From mckearn2 at gmail.com  Sun Mar  2 18:52:32 2025
From: mckearn2 at gmail.com (McKearn McKearn)
Date: Sun, 2 Mar 2025 18:52:32 -0700
Subject: [Fot] GT6 flywheel
Message-ID: <CAAGAaPXUW9QOpc5vJ7OLH+15t0=uKxgEZbXT5pMzwY6DRj9VKA@mail.gmail.com>

Hi all.
  Can anyone tell me the difference between a GT6 and a TR6 flywheel ?
I am shopping for an aluminum flywheel and am not finding much for the GT.
                             Thanks. P.J.
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From jason at jsperformancemotoring.com  Sun Mar  2 19:06:34 2025
From: jason at jsperformancemotoring.com (JS Performance Motoring, LLC)
Date: Sun, 2 Mar 2025 21:06:34 -0500
Subject: [Fot] GT6 flywheel
In-Reply-To: <CAAGAaPXUW9QOpc5vJ7OLH+15t0=uKxgEZbXT5pMzwY6DRj9VKA@mail.gmail.com>
References: <CAAGAaPXUW9QOpc5vJ7OLH+15t0=uKxgEZbXT5pMzwY6DRj9VKA@mail.gmail.com>
Message-ID: <CAEN1C=QbgpTGzN-HUUJsJS+3A-Pr=2sYrD63Q8R6tO+ASgsmAA@mail.gmail.com>

GT6 and TR6 flywheels share the same crankshaft mounting, ring gear, and
clutch mounting.

The GT6 flywheel is about 1/2" thinner than a late TR6 flywheel, and
locates the clutch that much closer to the engine.

Fidanza does make a GT6 specific aluminum flywheel, although sometimes they
are made to order and not in stock.


Jason Sukey
JS Performance Motoring, LLC
440.984.7720
jason at jsperformancemotoring.com
www.jspmparts.com
https://www.facebook.com/JSPerformanceMotoring/


On Sun, Mar 2, 2025 at 8:58?PM McKearn McKearn via Fot <fot at autox.team.net>
wrote:

> Hi all.
>   Can anyone tell me the difference between a GT6 and a TR6 flywheel ?
> I am shopping for an aluminum flywheel and am not finding much for the GT.
>                              Thanks. P.J.
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/jason at jsperformancemotoring.com
>
>
>
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From sbarr at McCarty-Law.com  Thu Mar  6 11:30:09 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 6 Mar 2025 18:30:09 +0000
Subject: [Fot] TV Spitfire Scene
Message-ID: <BN7PR15MB22433FD90F736E2CA2081828E1CA2@BN7PR15MB2243.namprd15.prod.outlook.com>

Did anyone else catch this?

https://www.imcdb.org/v001453177.html

I wandered past while my wife was watching her "Emily in Paris" show (snore), and one of the characters drove up in this nice little red Spitfire.  Looks just like my '72, though it's a later ('78?) car, eurospec, obviously.


Scott (B.)
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From nicholsondustin at yahoo.com  Thu Mar  6 13:58:47 2025
From: nicholsondustin at yahoo.com (dustin nicholson)
Date: Thu, 6 Mar 2025 14:58:47 -0600
Subject: [Fot] TV Spitfire Scene
In-Reply-To: <BN7PR15MB22433FD90F736E2CA2081828E1CA2@BN7PR15MB2243.namprd15.prod.outlook.com>
References: <BN7PR15MB22433FD90F736E2CA2081828E1CA2@BN7PR15MB2243.namprd15.prod.outlook.com>
Message-ID: <4AD13D70-6324-4CE4-AE2D-3917EB55DF62@yahoo.com>

I also saw that scene while my wife was watching Emily In Paris. LOL!

Dusty Nicholson 
281-871-9623

> On Mar 6, 2025, at 12:53?PM, Barr, Scott via Fot <fot at autox.team.net> wrote:
> 
> ?
> Did anyone else catch this? 
>  
> https://www.imcdb.org/v001453177.html
>  
> I wandered past while my wife was watching her ?Emily in Paris? show (snore), and one of the characters drove up in this nice little red Spitfire.  Looks just like my ?72, though it?s a later (?78?) car, eurospec, obviously.
>  
>  
> Scott (B.)
> _______________________________________________
> fot at autox.team.net
> 
> http://www.fot-racing.com
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/nicholsondustin at yahoo.com
> 
> 
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From sbarr at McCarty-Law.com  Thu Mar  6 14:04:20 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 6 Mar 2025 21:04:20 +0000
Subject: [Fot] TV Spitfire Scene
In-Reply-To: <4AD13D70-6324-4CE4-AE2D-3917EB55DF62@yahoo.com>
References: <BN7PR15MB22433FD90F736E2CA2081828E1CA2@BN7PR15MB2243.namprd15.prod.outlook.com>
 <4AD13D70-6324-4CE4-AE2D-3917EB55DF62@yahoo.com>
Message-ID: <BN7PR15MB2243ED39D51AC8051F12C3BFE1CA2@BN7PR15MB2243.namprd15.prod.outlook.com>

Like most of them, it needs a new rear spring (IMHO).

Scott (B.)


From: dustin nicholson <nicholsondustin at yahoo.com>
Sent: Thursday, March 6, 2025 2:59 PM
To: Barr, Scott <sbarr at McCarty-Law.com>
Cc: FOT at autox.team.net FOT at autox.team.net <FOT at autox.team.net>
Subject: Re: [Fot] TV Spitfire Scene

I also saw that scene while my wife was watching Emily In Paris. LOL!

Dusty Nicholson
281-871-9623


On Mar 6, 2025, at 12:53?PM, Barr, Scott via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:
?
Did anyone else catch this?

https://www.imcdb.org/v001453177.html

I wandered past while my wife was watching her ?Emily in Paris? show (snore), and one of the characters drove up in this nice little red Spitfire.  Looks just like my ?72, though it?s a later (?78?) car, eurospec, obviously.


Scott (B.)
_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/nicholsondustin at yahoo.com

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From dave at microworks.net  Tue Mar 11 12:26:25 2025
From: dave at microworks.net (Dave Riddle)
Date: Tue, 11 Mar 2025 18:26:25 +0000
Subject: [Fot] Diff Cover to use?
Message-ID: <SN7PR14MB7043209735879F954E241DE2B5D12@SN7PR14MB7043.namprd14.prod.outlook.com>

We have two different Diff Covers we could use on the TR4A. Which is the best choice per the collective FTO wisdom?

The one that is "open" came off a TR4A but the one looks stonger. The open cover would hold more gear oil obviously

[cid:image001.png at 01DB9278.6B272560]

[cid:image002.png at 01DB9278.6B272560]

[MWLOGO-Signature]<http://www.microworks.net/>
Dave Riddle
Business IT Consulting
Office: 480.610.8234
Cell: 602.692.5276
eMail: dave at microworks.net<mailto:dave at microworks.net>
Website: http://www.microworks.net<http://www.microworks.net/>
[Microsoft-Partner-Network]<https://partner.microsoft.com/en-US/>[ace_1_orig]<https://www.acronis.com/en-us/>[CCCLogo]<https://www.clio.com/>[cityhosted-authorized-dealer_orig]<https://www.citycommunications.com/>

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From tr4 at wi.rr.com  Tue Mar 11 13:24:37 2025
From: tr4 at wi.rr.com (tr4)
Date: Tue, 11 Mar 2025 14:24:37 -0500
Subject: [Fot] Diff Cover to use?
In-Reply-To: <SN7PR14MB7043209735879F954E241DE2B5D12@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <mailman.6.1741721130.11533.fot@autox.team.net>

I would use the open cover.? Strength is not really an issue with the covers.Sent via the Samsung Galaxy S23+ 5G, an AT&T 5G smartphone
-------- Original message --------From: Dave Riddle via Fot <fot at autox.team.net> Date: 3/11/25  1:50 PM  (GMT-06:00) To: "FOT (fot at autox.team.net)" <fot at autox.team.net> Subject: [Fot] Diff Cover to use? 

We have two different Diff Covers we could use on the TR4A. Which is the best choice per the collective FTO wisdom?
?
The one that is ?open? came off a TR4A but the one looks stonger. The open cover would hold more gear oil obviously
?

?

?

Dave Riddle
Business IT Consulting
Office: 480.610.8234
Cell: 602.692.5276
eMail: 
dave at microworks.net
Website: 
http://www.microworks.net

?



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From 4msonset at gmail.com  Tue Mar 11 13:36:11 2025
From: 4msonset at gmail.com (J Wagner)
Date: Tue, 11 Mar 2025 12:36:11 -0700
Subject: [Fot] Diff Cover to use?
In-Reply-To: <SN7PR14MB7043209735879F954E241DE2B5D12@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB7043209735879F954E241DE2B5D12@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <E706A6CD-B7C2-473F-9DB9-B581506C81E4@gmail.com>

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From dave at microworks.net  Tue Mar 11 13:54:42 2025
From: dave at microworks.net (Dave Riddle)
Date: Tue, 11 Mar 2025 19:54:42 +0000
Subject: [Fot] First drive of the TR4
Message-ID: <SN7PR14MB70436A7BB6191F4043A7ABDDB5D12@SN7PR14MB7043.namprd14.prod.outlook.com>

Short video of two laps of Podium Club from this past weekend. The first clip is from Saturday and the 2nd clip is from Sunday. Sadly the SD Card filled up (I had not paid attention) so did not record the fastest lap of the weekend at a 1:57.

https://youtu.be/wgS2FBCHcOo



[MWLOGO-Signature]<http://www.microworks.net/>
Dave Riddle
Business IT Consulting
Office: 480.610.8234
Cell: 602.692.5276
eMail: dave at microworks.net<mailto:dave at microworks.net>
Website: http://www.microworks.net<http://www.microworks.net/>
[Microsoft-Partner-Network]<https://partner.microsoft.com/en-US/>[ace_1_orig]<https://www.acronis.com/en-us/>[CCCLogo]<https://www.clio.com/>[cityhosted-authorized-dealer_orig]<https://www.citycommunications.com/>

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From jaboruch at yahoo.com  Tue Mar 11 15:19:21 2025
From: jaboruch at yahoo.com (Joe Boruch)
Date: Tue, 11 Mar 2025 21:19:21 +0000 (UTC)
Subject: [Fot] First drive of the TR4
In-Reply-To: <SN7PR14MB70436A7BB6191F4043A7ABDDB5D12@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB70436A7BB6191F4043A7ABDDB5D12@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <1710673964.2488820.1741727961280@mail.yahoo.com>

 Dave, nice job on the track.? I am using a Bell helmet with a chin spoiler/duck bill.? It makes a big difference with keeping the helmet from lifting.? I borrowed a helmet once and like you, it kept trying to lift off my head.JoeB
    On Tuesday, March 11, 2025 at 04:56:55 PM EDT, Dave Riddle via Fot <fot at autox.team.net> wrote:  
 
  
Short video of two laps of Podium Club from this past weekend. The first clip is from Saturday and the 2nd clip is from Sunday. Sadly the SD Card filled up (I had not paid attention) so did not record the fastest lap of the weekend at a 1:57.

https://youtu.be/wgS2FBCHcOo
 
 ?
 
 ?
 




  
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From catpusher at aol.com  Tue Mar 11 17:57:49 2025
From: catpusher at aol.com (catpusher at aol.com)
Date: Tue, 11 Mar 2025 23:57:49 +0000 (UTC)
Subject: [Fot] tr4a diff covers
In-Reply-To: <mailman.13637.1741721129.11536.fot@autox.team.net>
References: <mailman.13637.1741721129.11536.fot@autox.team.net>
Message-ID: <1079107606.2970059.1741737469846@mail.yahoo.com>

I used to run an electronic temp sender in the filler hole of my TR diff.Hardy
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From tr3a58dean at gmail.com  Tue Mar 11 18:34:04 2025
From: tr3a58dean at gmail.com (Dean Tetterton)
Date: Tue, 11 Mar 2025 20:34:04 -0400
Subject: [Fot] tr4a diff covers
In-Reply-To: <1079107606.2970059.1741737469846@mail.yahoo.com>
References: <mailman.13637.1741721129.11536.fot@autox.team.net>
 <1079107606.2970059.1741737469846@mail.yahoo.com>
Message-ID: <CADK3t9497hhsbcdjfp8qqs=3Ks+CM9WGrpgLQPqa3GmDxq7Xug@mail.gmail.com>

So what did you do when it gets hot?

Dean

On Tue, Mar 11, 2025 at 8:25?PM Hardy Prentice via Fot <fot at autox.team.net>
wrote:

> I used to run an electronic temp sender in the filler hole of my TR diff.
> Hardy
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/tr3a58dean at gmail.com
>
>
>
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From gblake58tr3 at icloud.com  Tue Mar 11 19:31:20 2025
From: gblake58tr3 at icloud.com (Greg Blake)
Date: Tue, 11 Mar 2025 20:31:20 -0500
Subject: [Fot] tr4a diff covers
In-Reply-To: <CADK3t9497hhsbcdjfp8qqs=3Ks+CM9WGrpgLQPqa3GmDxq7Xug@mail.gmail.com>
References: <CADK3t9497hhsbcdjfp8qqs=3Ks+CM9WGrpgLQPqa3GmDxq7Xug@mail.gmail.com>
Message-ID: <3A5AC80B-0791-4093-AE55-0955407C33F3@icloud.com>

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From vfracing at aol.com  Wed Mar 12 06:00:30 2025
From: vfracing at aol.com (Philip Gott)
Date: Wed, 12 Mar 2025 08:00:30 -0400
Subject: [Fot] tr4a diff covers
In-Reply-To: <3A5AC80B-0791-4093-AE55-0955407C33F3@icloud.com>
References: <3A5AC80B-0791-4093-AE55-0955407C33F3@icloud.com>
Message-ID: <4D787240-6DE6-49FB-9EFC-2A0398D849B8@aol.com>

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From robertlangtr6 at yahoo.com  Wed Mar 12 14:28:16 2025
From: robertlangtr6 at yahoo.com (Robert Lang)
Date: Wed, 12 Mar 2025 20:28:16 +0000 (UTC)
Subject: [Fot] tr4a diff covers
In-Reply-To: <3A5AC80B-0791-4093-AE55-0955407C33F3@icloud.com>
References: <CADK3t9497hhsbcdjfp8qqs=3Ks+CM9WGrpgLQPqa3GmDxq7Xug@mail.gmail.com>
 <3A5AC80B-0791-4093-AE55-0955407C33F3@icloud.com>
Message-ID: <181317100.3357873.1741811296254@mail.yahoo.com>

 FWIW, the smart guys run an oil cooler and oil pump. Synthetic works great up to a point. Then kerblammo.
Diffs run HOT.
    On Tuesday, March 11, 2025 at 09:44:21 PM EDT, Greg Blake via Fot <fot at autox.team.net> wrote:  
 
 We have experience with this on the Tx endurance TR6 car. Anything over a 30-45 sprint race and you need to be running full synthetic gear oil. If not, you will melt diff mounts, puke all gear oil out of the diff, burn up bearings?all sorts of failures that we had never experienced with vintage sprint races.?
So if you plan on any endurance racing, go for the extra fluid capacity and use synthetic. If a road car or just sprint races, probably doesn?t mater.?
Greg?
Sent from my iPhone

On Mar 11, 2025, at 20:07, Dean Tetterton via Fot <fot at autox.team.net> wrote:



?So what did you do when it gets hot?
Dean
On Tue, Mar 11, 2025 at 8:25?PM Hardy Prentice via Fot <fot at autox.team.net> wrote:

I used to run an electronic temp sender in the filler hole of my TR diff.Hardy_______________________________________________
fot at autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/tr3a58dean at gmail.com



_______________________________________________
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From sjanzen at me.com  Thu Mar 13 09:58:03 2025
From: sjanzen at me.com (Scott Janzen)
Date: Thu, 13 Mar 2025 11:58:03 -0400
Subject: [Fot] Radiators
Message-ID: <EBDE60DE-6D27-44ED-9042-EECB32FE25F9@me.com>

someone had asked recently about aluminum radiator sources.  I just had a couple made for a sports racer I?m restoring.  After getting a quote from Wizard, who has done great work for me before, I choked on the price and got three other quotes.  Two were consistent, but the third, from Howe Radiators (https://howeracing.com/collections/radiators) was literally half the price.  I traded a couple of emails, looked at who they are, and figured I had to try it.  The new rads showed up today (less than two weeks  from ordering) and are excellent craftsmanship.  Totally custom - I sent in the old side-pod radiators and they copied them.
I doubt Howe can beat an off-the-shelf product, but if you need anything non-stock absolutely consider them.

This was a difference of $1500 from others, to $775 from Howe.  I do not see that anything was compromised at all.

NFI.

Scott
'68 Triumph GT6
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From dave at microworks.net  Thu Mar 13 16:49:29 2025
From: dave at microworks.net (Dave Riddle)
Date: Thu, 13 Mar 2025 22:49:29 +0000
Subject: [Fot] Pix from this past weekend..
Message-ID: <SN7PR14MB704370A19C720ACA6955D889B5D32@SN7PR14MB7043.namprd14.prod.outlook.com>

First weekend being able to do some test laps with the TR4.  Went really well.

[cid:image001.png at 01DB942F.7FD0B680]


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From jason at multivintage.com  Fri Mar 14 11:09:55 2025
From: jason at multivintage.com (Jason Ostrowski)
Date: Fri, 14 Mar 2025 12:09:55 -0500
Subject: [Fot] Pix from this past weekend..
In-Reply-To: <SN7PR14MB704370A19C720ACA6955D889B5D32@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB704370A19C720ACA6955D889B5D32@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <9184A59C-99F3-4668-8412-FD454F2CC6CD@multivintage.com>

The car looks slick.
A+.
Jason Ostrowski
Friendly Ghost Racing 
1969 Triumph GT6+ racecars

Sent from my iPhone

> On Mar 13, 2025, at 6:09 PM, Dave Riddle via Fot <fot at autox.team.net> wrote:
> 
> ?
> First weekend being able to do some test laps with the TR4.  Went really well.
>  
> <image001.png>
>  
>  
> _______________________________________________
> fot at autox.team.net
> 
> http://www.fot-racing.com
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jason at multivintage.com
> 
> 
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From mark at efishers.com  Fri Mar 14 13:11:56 2025
From: mark at efishers.com (Mark Fisher)
Date: Fri, 14 Mar 2025 19:11:56 +0000 (UTC)
Subject: [Fot] Pix from this past weekend..
In-Reply-To: <9184A59C-99F3-4668-8412-FD454F2CC6CD@multivintage.com>
References: <SN7PR14MB704370A19C720ACA6955D889B5D32@SN7PR14MB7043.namprd14.prod.outlook.com>
 <9184A59C-99F3-4668-8412-FD454F2CC6CD@multivintage.com>
Message-ID: <2069765938.4234306.1741979516880@mail.yahoo.com>

 It certainly is LOW!!
looks like a ton of fun!

Mark "Silo" Fisher
    On Friday, March 14, 2025 at 12:33:47 PM CDT, Jason Ostrowski via Fot <fot at autox.team.net> wrote:  
 
 The car looks slick.A+.Jason OstrowskiFriendly Ghost Racing?1969 Triumph GT6+ racecars

Sent from my iPhone

On Mar 13, 2025, at 6:09 PM, Dave Riddle via Fot <fot at autox.team.net> wrote:



?
#yiv5067548836 filtered {}#yiv5067548836 filtered {}#yiv5067548836 p.yiv5067548836MsoNormal, #yiv5067548836 li.yiv5067548836MsoNormal, #yiv5067548836 div.yiv5067548836MsoNormal {margin:0in;font-size:12pt;font-family:Calibri, sans-serif;}#yiv5067548836 span.yiv5067548836EmailStyle17 {font-family:Calibri, sans-serif;color:windowtext;}#yiv5067548836 .yiv5067548836MsoChpDefault {}#yiv5067548836 filtered {}#yiv5067548836 div.yiv5067548836WordSection1 {}
First weekend being able to do some test laps with the TR4.? Went really well.
 
 ?
 

<image001.png> 
 ?
 
 ?
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From jaboruch at yahoo.com  Fri Mar 14 16:54:24 2025
From: jaboruch at yahoo.com (Joe Boruch)
Date: Fri, 14 Mar 2025 22:54:24 +0000 (UTC)
Subject: [Fot] Radiators
In-Reply-To: <EBDE60DE-6D27-44ED-9042-EECB32FE25F9@me.com>
References: <EBDE60DE-6D27-44ED-9042-EECB32FE25F9@me.com>
Message-ID: <506579378.100214.1741992864933@mail.yahoo.com>

 Howe just made a custom radiator for my TR3.? I had the same one made by them over 20 years ago.? The tubes on that old one have started clogging and it was running hot.? It was $400 20 years ago and it is about $900 now, about inline with inflation over these last 20 years.JoeB
    On Thursday, March 13, 2025 at 12:16:23 PM EDT, Scott Janzen via Fot <fot at autox.team.net> wrote:  
 
 someone had asked recently about aluminum radiator sources. ?I just had a couple made for a sports racer I?m restoring. ?After getting a quote from Wizard, who has done great work for me before, I choked on the price and got three other quotes. ?Two were consistent, but the third, from Howe Radiators (https://howeracing.com/collections/radiators) was literally half the price. ?I traded a couple of emails, looked at who they are, and figured I had to try it. ?The new rads showed up today (less than two weeks ?from ordering) and are excellent craftsmanship. ?Totally custom - I sent in the old side-pod radiators and they copied them.I doubt Howe can beat an off-the-shelf product, but if you need anything non-stock absolutely consider them.
This was a difference of $1500 from others, to $775 from Howe. ?I do not see that anything was compromised at all.
NFI.
Scott'68 Triumph GT6_______________________________________________
fot at autox.team.net

http://www.fot-racing.com

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From 4msonset at gmail.com  Sun Mar 16 09:36:21 2025
From: 4msonset at gmail.com (J Wagner)
Date: Sun, 16 Mar 2025 08:36:21 -0700
Subject: [Fot] catch kit reservoir breather
Message-ID: <9AFB03CE-4D29-4765-9E00-4BA79E15A9A7@gmail.com>

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From spitlist at cox.net  Sun Mar 16 10:07:03 2025
From: spitlist at cox.net (JOE CURRY)
Date: Sun, 16 Mar 2025 16:07:03 +0000 (UTC)
Subject: [Fot] catch kit reservoir breather
In-Reply-To: <9AFB03CE-4D29-4765-9E00-4BA79E15A9A7@gmail.com>
References: <9AFB03CE-4D29-4765-9E00-4BA79E15A9A7@gmail.com>
Message-ID: <1456221882.2515576.1742141223709@mail.yahoo.com>

 Got one.? Works pretty well.
    On Sunday, March 16, 2025 at 08:52:32 AM MST, J Wagner via Fot <fot at autox.team.net> wrote:  
 
 Just something I saw on Temu?. Looks like it might be well sorted and yet cheap.

|  |
| 
| catch kit reservoir breathershare.temu.com |

 |

_______________________________________________
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From trmarty at hotmail.com  Sun Mar 16 10:13:32 2025
From: trmarty at hotmail.com (marty sukey)
Date: Sun, 16 Mar 2025 16:13:32 +0000
Subject: [Fot] catch kit reservoir breather
In-Reply-To: <9AFB03CE-4D29-4765-9E00-4BA79E15A9A7@gmail.com>
References: <9AFB03CE-4D29-4765-9E00-4BA79E15A9A7@gmail.com>
Message-ID: <IA2PR84MB3951D3C0DD1631E47C8EBFCCBADC2@IA2PR84MB3951.NAMPRD84.PROD.OUTLOOK.COM>

I purchased one of these off a website somewhere last year (not Temu) for I think $35 shipped to my door. The quality was outstanding.

Marty
________________________________
From: Fot <fot-bounces at autox.team.net> on behalf of J Wagner via Fot <fot at autox.team.net>
Sent: Sunday, March 16, 2025 11:36 AM
To: FOT <fot at autox.team.net>
Subject: [Fot] catch kit reservoir breather

Just something I saw on Temu?. Looks like it might be well sorted and yet cheap.

<https://share.temu.com/cBnscy9TizC>
[8e58d3fb-5739-4fdf-bb5f-9605d45a6930.jpg]
catch kit reservoir breather<https://share.temu.com/cBnscy9TizC>
share.temu.com<https://share.temu.com/cBnscy9TizC>
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From dlhogye at comcast.net  Sun Mar 16 10:21:31 2025
From: dlhogye at comcast.net (DAVE HOGYE)
Date: Sun, 16 Mar 2025 09:21:31 -0700 (PDT)
Subject: [Fot] Spitfire Gasser on Ebay
Message-ID: <1950473033.137955.1742142091445@connect.xfinity.com>

I thought this was worth sharing.  Pretty cool and generates smiles.
 
Cheers,
Dave H. 
 
https://www.ebay.com/itm/335864748972?_skw=Triumph&itmmeta=01JPFVGRPS0Y6YFPWYYEKEX70P&hash=item4e33195bac%3Ag%3AHXsAAOSwnt5n1uRL&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1ceO0oBDGfhb1bojROEB%2BvuFQ1xLIet4Cnz2kMhNd%2BPQudEzD%2BnIkO1KCk2Z4nXIsTqhsO1igIvTIgDn9Az1CU%2FQvrs0lK7iNBfM5YhB%2FgUidR408ySiw33kqEKzu99tt%2B%2BJ0WCxeEwJJ8SycGhPvg4Gd0Oi%2FTFvBOGOfb0hpdM9Ml1Hlp1YTXdeD9JdFiQR5OKxdRy1JBuB5boMlv3UAbkEBZyU%2FAYxm2%2BZpkpxBdnTGdobRyWOczWLL5DxovDNAayqajopQG7PdVwkMXPsfPBawTezwPKoZzRrMmB%2B%2FuhXQ%3D%3D%7Ctkp%3ABk9SR9CLw_uzZQ&LH_ItemCondition=3000
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From dcphotos at icloud.com  Mon Mar 17 10:07:47 2025
From: dcphotos at icloud.com (Don Couch)
Date: Mon, 17 Mar 2025 11:07:47 -0500
Subject: [Fot] J-type O/D on single rail gearbox - Spitfire
Message-ID: <F71230EA-B82D-4D0D-A43A-F6EFBB018163@icloud.com>

Just had a guy dropped off a gearbox he wants rebuilt. He has a three rail Spitfire gearbox and a Single rail Spitfire gearbox that has a J-type O/D on it.

He wants me to put the J-type O/D box on the three rail gearbox if possible.

Anyone know if that can be done without Duct tape, JB weld or bubble gum?

Thanks, 
Don

From chasgee22 at gmail.com  Wed Mar 19 18:25:26 2025
From: chasgee22 at gmail.com (chasgee22 at gmail.com)
Date: Wed, 19 Mar 2025 20:25:26 -0400
Subject: [Fot] Performance cam for a street TR4
Message-ID: <C720EA37-D0AC-4FB0-9E2C-8C905B404F40@gmail.com>

So it looks like I have to rebuild the motor on my street TR4.  The current motor is stock and could use a little more performance.  Does anyone have a better than stock cam they are willing to part with?  Preferably something I can use with stock valve springs, but that?s not a deal breaker.  

If you don?t have a cam for sale, do you have a good recommendation?

Thanks,

Chuck

From ponobill at gmail.com  Wed Mar 19 20:11:35 2025
From: ponobill at gmail.com (Ponostyle)
Date: Wed, 19 Mar 2025 16:11:35 -1000
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <C720EA37-D0AC-4FB0-9E2C-8C905B404F40@gmail.com>
References: <C720EA37-D0AC-4FB0-9E2C-8C905B404F40@gmail.com>
Message-ID: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>

Hi Chuck,
 I'm sure you?ll get plenty of recommendations, but honestly, if all you?re going to do is a stock rebuild, then a different cam won?t do much other than screw with your powerband. If you?re not going to change anything else, the only worthwhile change is displacement, and even that is of limited benefit.    
Bill Babcock
Beach Bum
bill at ponostyle.com
https://www.Ponostyle.com

> On Mar 19, 2025, at 2:25 PM, Chuck Gee via Fot <fot at autox.team.net> wrote:
> 
> So it looks like I have to rebuild the motor on my street TR4.  The current motor is stock and could use a little more performance.  Does anyone have a better than stock cam they are willing to part with?  Preferably something I can use with stock valve springs, but that?s not a deal breaker.  
> 
> If you don?t have a cam for sale, do you have a good recommendation?
> 
> Thanks,
> 
> Chuck
> _______________________________________________
> fot at autox.team.net
> 
> http://www.fot-racing.com
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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> 

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From chasgee22 at gmail.com  Wed Mar 19 20:24:15 2025
From: chasgee22 at gmail.com (chasgee22 at gmail.com)
Date: Wed, 19 Mar 2025 22:24:15 -0400
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
References: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
Message-ID: <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>

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From ponobill at gmail.com  Wed Mar 19 20:53:06 2025
From: ponobill at gmail.com (Bill Babcock)
Date: Wed, 19 Mar 2025 16:53:06 -1000
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>
References: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
 <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>
Message-ID: <493478FC-1C82-4E5D-A3AB-8DD522897AD2@gmail.com>

Welcome to the rabbit hole. 

> On Mar 19, 2025, at 4:24 PM, chasgee22 at gmail.com wrote:
> 
> Thanks Bill.  I plan on using 87mm pistons already so maybe I?ll just shave the head a little to get more compression too.
> 
> Chuck
> 
>> On Mar 19, 2025, at 10:11?PM, Ponostyle <ponobill at gmail.com> wrote:
>> 
>> ?Hi Chuck,
>>  I'm sure you?ll get plenty of recommendations, but honestly, if all you?re going to do is a stock rebuild, then a different cam won?t do much other than screw with your powerband. If you?re not going to change anything else, the only worthwhile change is displacement, and even that is of limited benefit.    
>> Bill Babcock
>> Beach Bum
>> bill at ponostyle.com <mailto:bill at ponostyle.com>
>> https://www.Ponostyle.com
>> 
>>> On Mar 19, 2025, at 2:25 PM, Chuck Gee via Fot <fot at autox.team.net <mailto:fot at autox.team.net>> wrote:
>>> 
>>> So it looks like I have to rebuild the motor on my street TR4.  The current motor is stock and could use a little more performance.  Does anyone have a better than stock cam they are willing to part with?  Preferably something I can use with stock valve springs, but that?s not a deal breaker.  
>>> 
>>> If you don?t have a cam for sale, do you have a good recommendation?
>>> 
>>> Thanks,
>>> 
>>> Chuck
>>> _______________________________________________
>>> fot at autox.team.net <mailto:fot at autox.team.net>
>>> 
>>> http://www.fot-racing.com
>>> 
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bill at ponostyle.com
>>> 
>>> 
>> 

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From chasgee22 at gmail.com  Wed Mar 19 20:24:15 2025
From: chasgee22 at gmail.com (chasgee22 at gmail.com)
Date: Wed, 19 Mar 2025 22:24:15 -0400
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
References: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
Message-ID: <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>

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From ponobill at gmail.com  Wed Mar 19 21:02:15 2025
From: ponobill at gmail.com (Bill Babcock)
Date: Wed, 19 Mar 2025 17:02:15 -1000
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>
References: <EB21A821-C7F2-4BFE-B9A8-50838C6E2746@ponostyle.com>
 <B3293213-1E82-45E8-A76A-F16955303198@gmail.com>
Message-ID: <E1B293CD-E72A-4716-99B2-F65D6FEB4052@gmail.com>

TR3/4 motor flows like a pillow is stuffed over the intake. One change leads to another. With an intake manifold that looks like it was cast using plumbing parts and valves in the wrong places, there?s a limit to what a cam, bigger pistons, and a little more compression can do. Increasing compression is a great idea, but then the rods and crank start needing frequent attention. Next thing, you'll want to rev past 4500, you maniac. 


> On Mar 19, 2025, at 4:24 PM, chasgee22 at gmail.com wrote:
> 
> Thanks Bill.  I plan on using 87mm pistons already so maybe I?ll just shave the head a little to get more compression too.
> 
> Chuck
> 
>> On Mar 19, 2025, at 10:11?PM, Ponostyle <ponobill at gmail.com> wrote:
>> 
>> ?Hi Chuck,
>>  I'm sure you?ll get plenty of recommendations, but honestly, if all you?re going to do is a stock rebuild, then a different cam won?t do much other than screw with your powerband. If you?re not going to change anything else, the only worthwhile change is displacement, and even that is of limited benefit.    
>> Bill Babcock
>> Beach Bum
>> bill at ponostyle.com <mailto:bill at ponostyle.com>
>> https://www.Ponostyle.com
>> 
>>> On Mar 19, 2025, at 2:25 PM, Chuck Gee via Fot <fot at autox.team.net <mailto:fot at autox.team.net>> wrote:
>>> 
>>> So it looks like I have to rebuild the motor on my street TR4.  The current motor is stock and could use a little more performance.  Does anyone have a better than stock cam they are willing to part with?  Preferably something I can use with stock valve springs, but that?s not a deal breaker.  
>>> 
>>> If you don?t have a cam for sale, do you have a good recommendation?
>>> 
>>> Thanks,
>>> 
>>> Chuck
>>> _______________________________________________
>>> fot at autox.team.net <mailto:fot at autox.team.net>
>>> 
>>> http://www.fot-racing.com
>>> 
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bill at ponostyle.com
>>> 
>>> 
>> 

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From chasgee22 at gmail.com  Thu Mar 20 07:21:28 2025
From: chasgee22 at gmail.com (chasgee22 at gmail.com)
Date: Thu, 20 Mar 2025 09:21:28 -0400
Subject: [Fot] Performance cam for a street TR4
In-Reply-To: <E1B293CD-E72A-4716-99B2-F65D6FEB4052@gmail.com>
References: <E1B293CD-E72A-4716-99B2-F65D6FEB4052@gmail.com>
Message-ID: <EC33F09D-3454-4179-B7EF-E270F59B896F@gmail.com>

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From quikrx at yahoo.com  Thu Mar 20 08:32:29 2025
From: quikrx at yahoo.com (ralph hansen)
Date: Thu, 20 Mar 2025 14:32:29 +0000 (UTC)
Subject: [Fot] in search of
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
Message-ID: <1278973088.6352767.1742481149042@mail.yahoo.com>

hello everyone,
I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.
Cheers,Ralph?
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From sbarr at McCarty-Law.com  Thu Mar 20 08:58:46 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 20 Mar 2025 14:58:46 +0000
Subject: [Fot] in search of
In-Reply-To: <1278973088.6352767.1742481149042@mail.yahoo.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
Message-ID: <BN7PR15MB22435ADCA07DD3DEE727CAEAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>

Try Accurate Alignment & Frame Service in Appleton.  They made a custom spring for my Spit racer.[Image]


Scott Barr
McCarty Law LLP
(920) 257-2233
________________________________
From: Fot <fot-bounces at autox.team.net> on behalf of ralph hansen via Fot <fot at autox.team.net>
Sent: Thursday, March 20, 2025 9:32:29 AM
To: FOT Triumph <fot at autox.team.net>
Subject: [Fot] in search of

hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
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From spitlist at cox.net  Thu Mar 20 09:02:14 2025
From: spitlist at cox.net (JOE CURRY)
Date: Thu, 20 Mar 2025 15:02:14 +0000 (UTC)
Subject: [Fot] in search of
In-Reply-To: <1278973088.6352767.1742481149042@mail.yahoo.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
Message-ID: <1659250773.3462502.1742482934606@mail.yahoo.com>

 It has been that way for years.? It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.? Therein lies the rub!
Good luck.
Joe
    On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net> wrote:  
 
 hello everyone,
I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.
Cheers,Ralph?_______________________________________________
fot at autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net


  
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From rocky at spitfire4.com  Thu Mar 20 11:51:13 2025
From: rocky at spitfire4.com (rocky spitfire4.com)
Date: Thu, 20 Mar 2025 17:51:13 +0000
Subject: [Fot] in search of
In-Reply-To: <1659250773.3462502.1742482934606@mail.yahoo.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
Message-ID: <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>

Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?

The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).

Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.

I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.

He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
[A diagram of a shock bolt  AI-generated content may be incorrect.]
The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.

He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.

Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.

It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.

I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.

?Rocky Entriken



From: Fot <fot-bounces at autox.team.net> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: Re: [Fot] in search of

It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!

Good luck.

Joe

On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:


hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net

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From ponobill at gmail.com  Thu Mar 20 13:07:34 2025
From: ponobill at gmail.com (Ponostyle)
Date: Thu, 20 Mar 2025 09:07:34 -1000
Subject: [Fot] in search of
In-Reply-To: <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
Message-ID: <0D9DCDCA-08E7-43A4-B291-BF1AE1DB4950@ponostyle.com>

For what it's worth, Benz Sping in Portland, OR will make any spring you want. It used to be silly cheap compared to the alternatives, but I haven?t used them for decades. I had front springs for Peyote that ranged in 20 pound increments. I?ve still got a bunch of them though I gave the current caretaker most of my parts. I also had rear leaf springs made one, easy folks to work with, even for dinky jobs like mine. 

> On Mar 20, 2025, at 7:51?AM, rocky spitfire4.com via Fot <fot at autox.team.net> wrote:
> 
> Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?
>  
> The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).
>  
> Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.
>  
> I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues. 
>  
> He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
> <image001.jpg>
> The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off. 
>  
> He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.
>  
> Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.
>  
> It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.
>  
> I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.
>  
> ?Rocky Entriken
>  
>  
>  
> From: Fot <fot-bounces at autox.team.net <mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
> Sent: Thursday, March 20, 2025 10:02 AM
> To: FOT Triumph <fot at autox.team.net <mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com <mailto:quikrx at yahoo.com>>
> Subject: Re: [Fot] in search of
>  
> It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!
>  
> Good luck.
>  
> Joe
>  
> On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net <mailto:fot at autox.team.net>> wrote:
>  
>  
> hello everyone,
>  
> I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.
>  
> Cheers,
> Ralph 
> _______________________________________________
> fot at autox.team.net <mailto:fot at autox.team.net>
> 
> http://www.fot-racing.com <http://www.fot-racing.com/>
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net
> 
> 
> _______________________________________________
> fot at autox.team.net <mailto:fot at autox.team.net>
> 
> http://www.fot-racing.com <http://www.fot-racing.com/>
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/bill at ponostyle.com

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From sbarr at McCarty-Law.com  Thu Mar 20 13:30:01 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 20 Mar 2025 19:30:01 +0000
Subject: [Fot] in search of
In-Reply-To: <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
Message-ID: <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>

It must work great or you wouldn?t have used it so successfully for 40 years, but?when under straight line braking, when the droop get arrested by the cable, doesn?t it go from whatever the spring?s rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?

Scott (B.)


From: Fot <fot-bounces at autox.team.net> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: Re: [Fot] in search of

Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?

The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).

Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.

I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.

He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
[A diagram of a shock bolt  AI-generated content may be incorrect.]
The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.

He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.

Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.

It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.

I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.

?Rocky Entriken



From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!

Good luck.

Joe

On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:


hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net
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From rocky at spitfire4.com  Thu Mar 20 14:04:34 2025
From: rocky at spitfire4.com (rocky spitfire4.com)
Date: Thu, 20 Mar 2025 20:04:34 +0000
Subject: [Fot] in search of
In-Reply-To: <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
Message-ID: <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>

Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine

Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven?t used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.

Not sure what you mean by ?infinite spring rate.? The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn?t run out of talent and screw up the braking, upsetting the balance.

--Rocky

From: Barr, Scott <sbarr at McCarty-Law.com>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com>; JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: RE: [Fot] in search of

It must work great or you wouldn?t have used it so successfully for 40 years, but?when under straight line braking, when the droop get arrested by the cable, doesn?t it go from whatever the spring?s rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?

Scott (B.)


From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?

The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).

Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.

I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.

He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
[A diagram of a shock bolt  AI-generated content may be incorrect.]
The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.

He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.

Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.

It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.

I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.

?Rocky Entriken



From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!

Good luck.

Joe

On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:


hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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From sbarr at McCarty-Law.com  Thu Mar 20 15:12:55 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 20 Mar 2025 21:12:55 +0000
Subject: [Fot] in search of
In-Reply-To: <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
Message-ID: <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>

What I meant by ?infinite spring rate? is, based on my understanding of the system you?re describing, the condition when both rear axles droop and hit the end of the cable ?leash?.  As I understand it, you essentially had both rear axles hanging from a single cable that slid from side to side under cornering loads but, under braking, with both axles traveling downward at the same time, would be arrested by hitting the end of that cable ?leash?.  Am I understanding the setup correctly?  I would think that would be similar to having a leaf spring hit the bump stop and going from whatever the spring rate is to *no* spring, or ?infinite spring rate?.

I asked because I considered creating a similar system once for my Spit racer, as well as for my dad?s swing axle GT6 racer, but wanted either to add a spring in the middle of the cable or to run the cable over a spring-loaded central pully of some sort ? just to ease the transition from normal spring operation to full leash arrest.   Maybe that wouldn?t be necessary?

Scott (B.)

From: rocky spitfire4.com <rocky at spitfire4.com>
Sent: Thursday, March 20, 2025 3:05 PM
To: Barr, Scott <sbarr at McCarty-Law.com>; JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: RE: [Fot] in search of

Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine

Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven?t used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.

Not sure what you mean by ?infinite spring rate.? The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn?t run out of talent and screw up the braking, upsetting the balance.

--Rocky

From: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of

It must work great or you wouldn?t have used it so successfully for 40 years, but?when under straight line braking, when the droop get arrested by the cable, doesn?t it go from whatever the spring?s rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?

Scott (B.)


From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?

The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).

Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.

I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.

He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
[A diagram of a shock bolt  AI-generated content may be incorrect.]
The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.

He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.

Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.

It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.

I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.

?Rocky Entriken



From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!

Good luck.

Joe

On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:


hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net
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From solarant at hotmail.com  Thu Mar 20 16:54:08 2025
From: solarant at hotmail.com (Anthony Parker)
Date: Thu, 20 Mar 2025 22:54:08 +0000
Subject: [Fot] in search of
In-Reply-To: <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
Message-ID: <MN0PR84MB3867B29BA266F481B92FDBC8D7D82@MN0PR84MB3867.NAMPRD84.PROD.OUTLOOK.COM>

This is a very interesting setup and discussion.

Formula VEEs, especially the later "zero roll" designs have elastomeric pucks in the droop limiters to ease the shock on rebound. Might not be worth the complexity in the Spitfire.

I would love to see a back to back experiment between this setup and one with very short dampers which limited the droop to the same degree as the cable system we're discussing. I think a large question now is, with the static camber of this setup, whether jacking and tuck-under still prevail, or is cornering squat possible? If cornering squat is possible, then the cable and inside spring are exacerbating it, but this may be ok if the body rolls enough.

This pre-loaded spring setup does not result in "infinite rate" when reaching the travel limit or droop, but in extension or downward wheel travel, does result in 0 lbf change per 0 inches of deflection.  This, however, does not mean that the rear tire contact patch sees zero force from the ground.  Here, steady state breaking potential for the rear axle will be limited by contact patch shape/size and forward weight transfer. Certainly, droop limiting to zero degrees camber will result in the best contact patch and may reduce forward weight transfer because the C.G. may remain lower in this setup than one with the rear spring helping to lift the rear of the car.



________________________________
From: Fot <fot-bounces at autox.team.net> on behalf of Barr, Scott via Fot <fot at autox.team.net>
Sent: Thursday, March 20, 2025 5:12 PM
To: rocky spitfire4.com <rocky at spitfire4.com>; JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: Re: [Fot] in search of


What I meant by ?infinite spring rate? is, based on my understanding of the system you?re describing, the condition when both rear axles droop and hit the end of the cable ?leash?.  As I understand it, you essentially had both rear axles hanging from a single cable that slid from side to side under cornering loads but, under braking, with both axles traveling downward at the same time, would be arrested by hitting the end of that cable ?leash?.  Am I understanding the setup correctly?  I would think that would be similar to having a leaf spring hit the bump stop and going from whatever the spring rate is to *no* spring, or ?infinite spring rate?.



I asked because I considered creating a similar system once for my Spit racer, as well as for my dad?s swing axle GT6 racer, but wanted either to add a spring in the middle of the cable or to run the cable over a spring-loaded central pully of some sort ? just to ease the transition from normal spring operation to full leash arrest.   Maybe that wouldn?t be necessary?



Scott (B.)



From: rocky spitfire4.com <rocky at spitfire4.com>
Sent: Thursday, March 20, 2025 3:05 PM
To: Barr, Scott <sbarr at McCarty-Law.com>; JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: RE: [Fot] in search of



Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine



Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven?t used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.



Not sure what you mean by ?infinite spring rate.? The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn?t run out of talent and screw up the braking, upsetting the balance.



--Rocky



From: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of



It must work great or you wouldn?t have used it so successfully for 40 years, but?when under straight line braking, when the droop get arrested by the cable, doesn?t it go from whatever the spring?s rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?



Scott (B.)





From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?



The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).



Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.



I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.



He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.

[A diagram of a shock bolt  AI-generated content may be incorrect.]

The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.



He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.



Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.



It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.



I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.



?Rocky Entriken







From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!



Good luck.



Joe



On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:





hello everyone,



I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.



Cheers,

Ralph

_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/spitlist at cox.net
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From rocky at spitfire4.com  Thu Mar 20 17:17:54 2025
From: rocky at spitfire4.com (rocky spitfire4.com)
Date: Thu, 20 Mar 2025 23:17:54 +0000
Subject: [Fot] in search of
In-Reply-To: <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
Message-ID: <BYAPR05MB6405BEAEADFCCE979884847FEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>

Yeah, Okay. [?]  Well with this setup, especially on the race car where we tied it up as tight as possible, essentially there?s no droop. The cable does slide side to side, but it?s very minimal movement. On my street car I purposely left it able to droop some but then I?m seldom really threshold braking in that car, so when it?s on the ground (as opposed to on jackstands) the effect is just a softer ride.

--Rocky

From: Barr, Scott <sbarr at McCarty-Law.com>
Sent: Thursday, March 20, 2025 4:13 PM
To: rocky spitfire4.com <rocky at spitfire4.com>; JOE CURRY <spitlist at cox.net>; FOT Triumph <fot at autox.team.net>; ralph hansen <quikrx at yahoo.com>
Subject: RE: [Fot] in search of

What I meant by ?infinite spring rate? is, based on my understanding of the system you?re describing, the condition when both rear axles droop and hit the end of the cable ?leash?.  As I understand it, you essentially had both rear axles hanging from a single cable that slid from side to side under cornering loads but, under braking, with both axles traveling downward at the same time, would be arrested by hitting the end of that cable ?leash?.  Am I understanding the setup correctly?  I would think that would be similar to having a leaf spring hit the bump stop and going from whatever the spring rate is to *no* spring, or ?infinite spring rate?.

I asked because I considered creating a similar system once for my Spit racer, as well as for my dad?s swing axle GT6 racer, but wanted either to add a spring in the middle of the cable or to run the cable over a spring-loaded central pully of some sort ? just to ease the transition from normal spring operation to full leash arrest.   Maybe that wouldn?t be necessary?

Scott (B.)

From: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>
Sent: Thursday, March 20, 2025 3:05 PM
To: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of

Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine

Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven?t used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.

Not sure what you mean by ?infinite spring rate.? The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn?t run out of talent and screw up the braking, upsetting the balance.

--Rocky

From: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of

It must work great or you wouldn?t have used it so successfully for 40 years, but?when under straight line braking, when the droop get arrested by the cable, doesn?t it go from whatever the spring?s rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?

Scott (B.)


From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?

The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That?s when I decided not to renew my AAA membership, but I digress).

Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn?t work all that well.

I drove the car without a CC for a few years, then gave it to my brother (who?s a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle?s swing-axle issues.

He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.
[A diagram of a shock bolt  AI-generated content may be incorrect.]
The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.

He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.

Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another ?64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn?t autocross that car). On that one I found a pulley that came with a shroud, didn?t need the retainer.

It works as a camber compensator without that evil spring. The swing axle doesn?t swing any more. Both rear wheels remain constant with each other.

I?ve given this design to several other drivers. One came up with a clever trick ? he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.

?Rocky Entriken



From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of

It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!

Good luck.

Joe

On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:


hello everyone,

I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.

Cheers,
Ralph
_______________________________________________
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From sbarr at McCarty-Law.com  Thu Mar 20 17:33:33 2025
From: sbarr at McCarty-Law.com (Barr, Scott)
Date: Thu, 20 Mar 2025 23:33:33 +0000
Subject: [Fot] in search of
In-Reply-To: <MN0PR84MB3867B29BA266F481B92FDBC8D7D82@MN0PR84MB3867.NAMPRD84.PROD.OUTLOOK.COM>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <MN0PR84MB3867B29BA266F481B92FDBC8D7D82@MN0PR84MB3867.NAMPRD84.PROD.OUTLOOK.COM>
Message-ID: <BN7PR15MB2243FE8DEE5B1D7B475AE8B0E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>

<< This pre-loaded spring setup does not result in "infinite rate" when reaching the travel limit or droop, but in extension or downward wheel travel, does result in 0 lbf change per 0 inches of deflection.   >>

Yes, that might be a better way of putting it.  This is the other side of the coin from hitting the bump stop.  As the axles droop, there is SOME amount of spring pressure pushing the tires into the track (or the shoulders of the tires, possibly, depending on how long your cable is).  But when you hit the end of the "leash", there is suddenly NO spring pressure.  I was wondering if that sudden change from some to none would upset the car at all.  Evidently not.

Rocky must be a very smooth driver  :-)

Scott (B.)

From: Fot <fot-bounces at autox.team.net> On Behalf Of Anthony Parker via Fot
Sent: Thursday, March 20, 2025 5:54 PM
To: FOT Triumph <fot at autox.team.net>
Subject: Re: [Fot] in search of

This is a very interesting setup and discussion.

Formula VEEs, especially the later "zero roll" designs have elastomeric pucks in the droop limiters to ease the shock on rebound. Might not be worth the complexity in the Spitfire.

I would love to see a back to back experiment between this setup and one with very short dampers which limited the droop to the same degree as the cable system we're discussing. I think a large question now is, with the static camber of this setup, whether jacking and tuck-under still prevail, or is cornering squat possible? If cornering squat is possible, then the cable and inside spring are exacerbating it, but this may be ok if the body rolls enough.

This pre-loaded spring setup does not result in "infinite rate" when reaching the travel limit or droop, but in extension or downward wheel travel, does result in 0 lbf change per 0 inches of deflection.  This, however, does not mean that the rear tire contact patch sees zero force from the ground.  Here, steady state breaking potential for the rear axle will be limited by contact patch shape/size and forward weight transfer. Certainly, droop limiting to zero degrees camber will result in the best contact patch and may reduce forward weight transfer because the C.G. may remain lower in this setup than one with the rear spring helping to lift the rear of the car.



________________________________
From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> on behalf of Barr, Scott via Fot <fot at autox.team.net<mailto:fot at autox.team.net>>
Sent: Thursday, March 20, 2025 5:12 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of


What I meant by "infinite spring rate" is, based on my understanding of the system you're describing, the condition when both rear axles droop and hit the end of the cable "leash".  As I understand it, you essentially had both rear axles hanging from a single cable that slid from side to side under cornering loads but, under braking, with both axles traveling downward at the same time, would be arrested by hitting the end of that cable "leash".  Am I understanding the setup correctly?  I would think that would be similar to having a leaf spring hit the bump stop and going from whatever the spring rate is to *no* spring, or "infinite spring rate".



I asked because I considered creating a similar system once for my Spit racer, as well as for my dad's swing axle GT6 racer, but wanted either to add a spring in the middle of the cable or to run the cable over a spring-loaded central pully of some sort - just to ease the transition from normal spring operation to full leash arrest.   Maybe that wouldn't be necessary?



Scott (B.)



From: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>
Sent: Thursday, March 20, 2025 3:05 PM
To: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of



Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine



Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven't used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.



Not sure what you mean by "infinite spring rate." The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn't run out of talent and screw up the braking, upsetting the balance.



--Rocky



From: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of



It must work great or you wouldn't have used it so successfully for 40 years, but...when under straight line braking, when the droop get arrested by the cable, doesn't it go from whatever the spring's rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?



Scott (B.)





From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?



The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That's when I decided not to renew my AAA membership, but I digress).



Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn't work all that well.



I drove the car without a CC for a few years, then gave it to my brother (who's a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle's swing-axle issues.



He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.

[A diagram of a shock bolt  AI-generated content may be incorrect.]

The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.



He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.



Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another '64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn't autocross that car). On that one I found a pulley that came with a shroud, didn't need the retainer.



It works as a camber compensator without that evil spring. The swing axle doesn't swing any more. Both rear wheels remain constant with each other.



I've given this design to several other drivers. One came up with a clever trick - he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.



-Rocky Entriken







From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!



Good luck.



Joe



On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:





hello everyone,



I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.



Cheers,

Ralph

_______________________________________________
fot at autox.team.net<mailto:fot at autox.team.net>

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From rocky at spitfire4.com  Thu Mar 20 21:35:05 2025
From: rocky at spitfire4.com (rocky spitfire4.com)
Date: Fri, 21 Mar 2025 03:35:05 +0000
Subject: [Fot] in search of
In-Reply-To: <BN7PR15MB2243FE8DEE5B1D7B475AE8B0E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
References: <1278973088.6352767.1742481149042.ref@mail.yahoo.com>
 <1278973088.6352767.1742481149042@mail.yahoo.com>
 <1659250773.3462502.1742482934606@mail.yahoo.com>
 <BYAPR05MB64054499CF988AA20D5A1C8BEBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243648967AF77A1EBFAA271E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <BYAPR05MB640547F55C01ED706A1551C8EBD82@BYAPR05MB6405.namprd05.prod.outlook.com>
 <BN7PR15MB2243F6732BE0D9AA319ED6AAE1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
 <MN0PR84MB3867B29BA266F481B92FDBC8D7D82@MN0PR84MB3867.NAMPRD84.PROD.OUTLOOK.COM>
 <BN7PR15MB2243FE8DEE5B1D7B475AE8B0E1D82@BN7PR15MB2243.namprd15.prod.outlook.com>
Message-ID: <BYAPR05MB6405DDF004CBB5D524FA82CDEBDB2@BYAPR05MB6405.namprd05.prod.outlook.com>

Smooth? Well, sometimes. LOL. Check the attached.

Two pix. Same event (2000 Solo Nationals). Similar corners.

The top one was first run. I came in too hot, braked too late, got the car all jacked up, you can get an idea of how much droop it really has when I do it wrong. It's actually one of my favorite photos because it's a very dynamic picture, but it is not an example of "smooth" driving. [?]  But what's not happening is the right rear wheel is not tucking under the car, I'm not cornering on the sidewall (I've done that when the car was still my street car).

Bottom photo, car is flat , I'm much smoother here, car is leaning but all four tires are in contact with the pavement and I'm faster through the corner. I've always felt like with my cable setup essentially the car will rotate horizontally on a line from nose to tail, but the body roll is not really that severe. [?]

Of course, with the welded diff, even with a wheel in the air I still get power to the down wheel and can power out.

--Rocky

From: Barr, Scott <sbarr at McCarty-Law.com>
Sent: Thursday, March 20, 2025 6:34 PM
To: Anthony Parker <solarant at hotmail.com>; FOT Triumph <fot at autox.team.net>; rocky spitfire4.com <rocky at spitfire4.com>
Subject: RE: [Fot] in search of

<< This pre-loaded spring setup does not result in "infinite rate" when reaching the travel limit or droop, but in extension or downward wheel travel, does result in 0 lbf change per 0 inches of deflection.   >>

Yes, that might be a better way of putting it.  This is the other side of the coin from hitting the bump stop.  As the axles droop, there is SOME amount of spring pressure pushing the tires into the track (or the shoulders of the tires, possibly, depending on how long your cable is).  But when you hit the end of the "leash", there is suddenly NO spring pressure.  I was wondering if that sudden change from some to none would upset the car at all.  Evidently not.

Rocky must be a very smooth driver  :-)

Scott (B.)

From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of Anthony Parker via Fot
Sent: Thursday, March 20, 2025 5:54 PM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>
Subject: Re: [Fot] in search of

This is a very interesting setup and discussion.

Formula VEEs, especially the later "zero roll" designs have elastomeric pucks in the droop limiters to ease the shock on rebound. Might not be worth the complexity in the Spitfire.

I would love to see a back to back experiment between this setup and one with very short dampers which limited the droop to the same degree as the cable system we're discussing. I think a large question now is, with the static camber of this setup, whether jacking and tuck-under still prevail, or is cornering squat possible? If cornering squat is possible, then the cable and inside spring are exacerbating it, but this may be ok if the body rolls enough.

This pre-loaded spring setup does not result in "infinite rate" when reaching the travel limit or droop, but in extension or downward wheel travel, does result in 0 lbf change per 0 inches of deflection.  This, however, does not mean that the rear tire contact patch sees zero force from the ground.  Here, steady state breaking potential for the rear axle will be limited by contact patch shape/size and forward weight transfer. Certainly, droop limiting to zero degrees camber will result in the best contact patch and may reduce forward weight transfer because the C.G. may remain lower in this setup than one with the rear spring helping to lift the rear of the car.



________________________________
From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> on behalf of Barr, Scott via Fot <fot at autox.team.net<mailto:fot at autox.team.net>>
Sent: Thursday, March 20, 2025 5:12 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of


What I meant by "infinite spring rate" is, based on my understanding of the system you're describing, the condition when both rear axles droop and hit the end of the cable "leash".  As I understand it, you essentially had both rear axles hanging from a single cable that slid from side to side under cornering loads but, under braking, with both axles traveling downward at the same time, would be arrested by hitting the end of that cable "leash".  Am I understanding the setup correctly?  I would think that would be similar to having a leaf spring hit the bump stop and going from whatever the spring rate is to *no* spring, or "infinite spring rate".



I asked because I considered creating a similar system once for my Spit racer, as well as for my dad's swing axle GT6 racer, but wanted either to add a spring in the middle of the cable or to run the cable over a spring-loaded central pully of some sort - just to ease the transition from normal spring operation to full leash arrest.   Maybe that wouldn't be necessary?



Scott (B.)



From: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>
Sent: Thursday, March 20, 2025 3:05 PM
To: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of



Yes, it caused no trouble for me. Neither road racing nor autocrossing. Essentially no droop. And FWIW, on numerous occasions when other people have driven my car, they often commented on how well it handled. Very neutral. I never did the turnbuckle thing on mine



Originally it had a limited slip diff, but I finally wore that thing out. Replaced with a welded-up rear. It was even better, tighter. (But harder to push around in the paddock.) I usually had a 4:55, best for autocrossing and most MiDiv tracks. Originally it had a 4:11 but I haven't used that for decades. Borrowed a 3:89 to do the 2011 Runoffs at Road America.



Not sure what you mean by "infinite spring rate." The only spring is the transverse springs over the top of the diff (and I still had the stock spring!). When I went to do a straight-line stop, it stopped. In a straight line. It would trail brake nicely and predictably, with both tires on the ground. As long as I didn't run out of talent and screw up the braking, upsetting the balance.



--Rocky



From: Barr, Scott <sbarr at McCarty-Law.com<mailto:sbarr at McCarty-Law.com>>
Sent: Thursday, March 20, 2025 2:30 PM
To: rocky spitfire4.com <rocky at spitfire4.com<mailto:rocky at spitfire4.com>>; JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: RE: [Fot] in search of



It must work great or you wouldn't have used it so successfully for 40 years, but...when under straight line braking, when the droop get arrested by the cable, doesn't it go from whatever the spring's rate is instantly to infinite spring rate?  Am I understanding that correctly?  And that change caused no trouble for you?



Scott (B.)





From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of rocky spitfire4.com via Fot
Sent: Thursday, March 20, 2025 12:51 PM
To: JOE CURRY <spitlist at cox.net<mailto:spitlist at cox.net>>; FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



Are we talking the camber compensator for the Spitfire that has a middle mounting bolted to the bottom three bolts of the differential?



The scariest moment I ever had in my 1964 Spitfire, back when it was my daily driver (ca. 1967), was when my diff locked up as I was passing a semi on I-35 in Kansas City. I barely got the car over to the shoulder without getting run over, then spent six hours on the roadside waiting for AAA to send me a tow truck! (That's when I decided not to renew my AAA membership, but I digress).



Turned out the middle mounting on that camber compensator had broken off the sections on the two end bolts because of the constant flexing on it, so only the middle bolt was holding it in place. The constant action on that one bolt eventually made the round bolt hole oval shaped, and all the diff fluid drained out. A dry diff really doesn't work all that well.



I drove the car without a CC for a few years, then gave it to my brother (who's a mechanic) to turn into a race car, He came up with a solution which I understand originated with Volkswagen owners to address the Beetle's swing-axle issues.



He tied a cable to the bottom shock mount, ran it up to a pulley attached to the top shock mount, then across to the same setup on the other side.

[A diagram of a shock bolt  AI-generated content may be incorrect.]

The biggest modification was to take that big bolt at the top of the shock, drill and tap it through the head to take a shouldered 1/4-inch bolt which becomes the hub for the pulley. Not shown, a simple retainer over the top of the pulley to prevent the cable from jumping off.



He did that in 1971. He raced the car for three years, then I got it back and raced and autocrossed it through 2011. In all that time, 40 years, I replaced the cable just once.



Since it was going on a race car, we jacked the rear suspension as high as we could (filled the trunk with heavy stuff while the car was on jackstands, then sat someone in the trunk while we attached the cable) which both lowered the car and stiffened the ride. I later bought another '64 Spit as a street car and did the same trick, but let the suspension droop more so it was softer for street use (I also didn't autocross that car). On that one I found a pulley that came with a shroud, didn't need the retainer.



It works as a camber compensator without that evil spring. The swing axle doesn't swing any more. Both rear wheels remain constant with each other.



I've given this design to several other drivers. One came up with a clever trick - he cut an opening in the diff tunnel under the gas tank (which also provides nice access to the bolts holding the spring to the top of the diff). Then he installed a turnbuckle in the cable at that location. Adjustable suspension! Cheap and easy. And IMHO safer.



-Rocky Entriken







From: Fot <fot-bounces at autox.team.net<mailto:fot-bounces at autox.team.net>> On Behalf Of JOE CURRY via Fot
Sent: Thursday, March 20, 2025 10:02 AM
To: FOT Triumph <fot at autox.team.net<mailto:fot at autox.team.net>>; ralph hansen <quikrx at yahoo.com<mailto:quikrx at yahoo.com>>
Subject: Re: [Fot] in search of



It has been that way for years.  It became impossible for me to market them at the price that I knew was affordable for most Spitfire owners.  Therein lies the rub!



Good luck.



Joe



On Thursday, March 20, 2025 at 07:48:44 AM MST, ralph hansen via Fot <fot at autox.team.net<mailto:fot at autox.team.net>> wrote:





hello everyone,



I'm looking for a leaf spring manufacturer to make up about 25 single leaf springs. Preferably close to Milwaukee but just about anywhere might work. Must do good work and be reliable. These springs would be for the TR camber compensators. Doing some shopping around since one I've used has doubled the cost in 5 years. Thanks in advance.



Cheers,

Ralph

_______________________________________________
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From vfracing at aol.com  Sat Mar 22 13:13:46 2025
From: vfracing at aol.com (Philip Gott)
Date: Sat, 22 Mar 2025 15:13:46 -0400
Subject: [Fot] Differential cross shaft pin retention
References: <C0797877-5888-429F-9622-95928AD16A4A.ref@aol.com>
Message-ID: <C0797877-5888-429F-9622-95928AD16A4A@aol.com>

Hi FOT;
On two different cars I?ve had the small pin that holds the cross shaft in place come loose. (One a street stock TR3B, the other a 4A race car.) What is the collective FoT wisdom for  methods of locating the cross shaft or keeping the retaining pin in place?
Phil Gott


Sent from my iPhone

From michaelndeweerd at gmail.com  Sat Mar 22 16:09:55 2025
From: michaelndeweerd at gmail.com (Michael Deweerd)
Date: Sat, 22 Mar 2025 18:09:55 -0400
Subject: [Fot] TR4 head port dimensions
Message-ID: <CAHAH3R7b23wDpsxw7-nFHrhZ22UB=C9k5XsE8juV+OuxR2TwgA@mail.gmail.com>

Has anyone ever laid out the TR4 port sizes and dimensions?
I?m wanting to know the distance between exhaust ports and the bolt pattern
to make my header.
If anyone has a pdf drawing it would be appreciated.
Cheers

*Mike Deweerd*
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From thompsong at prodigy.net  Sat Mar 22 17:33:52 2025
From: thompsong at prodigy.net (GREGORY THOMPSON)
Date: Sat, 22 Mar 2025 23:33:52 +0000 (UTC)
Subject: [Fot] TR4 head port dimensions
In-Reply-To: <CAHAH3R7b23wDpsxw7-nFHrhZ22UB=C9k5XsE8juV+OuxR2TwgA@mail.gmail.com>
References: <CAHAH3R7b23wDpsxw7-nFHrhZ22UB=C9k5XsE8juV+OuxR2TwgA@mail.gmail.com>
Message-ID: <1913631327.722119.1742686434259@mail.yahoo.com>

I had a stainless plate made up but won?t be able to get the file until Monday. ?Are you doing steel? I could get a quote if you want? ?It?s a shop my son works at so I get a little break.??Email me at thompsong at prodigy.net if you want to take it off the FOT list.



?Greg


Sent from AT&T Yahoo Mail for iPhone


On Saturday, March 22, 2025, 5:14 PM, Michael Deweerd via Fot <fot at autox.team.net> wrote:

Has anyone ever laid out the TR4 port sizes and dimensions??I?m wanting to know the distance between exhaust ports and the bolt pattern to make my header.?If anyone has a pdf drawing it would be appreciated.?Cheers?

Mike Deweerd_______________________________________________
fot at autox.team.net

http://www.fot-racing.com

Donate: http://www.team.net/donate.html
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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From tjwakeman at gmail.com  Sun Mar 23 17:01:31 2025
From: tjwakeman at gmail.com (TeriAnn J. Wakeman)
Date: Sun, 23 Mar 2025 16:01:31 -0700
Subject: [Fot] TR4 head port dimensions
In-Reply-To: <CAHAH3R7b23wDpsxw7-nFHrhZ22UB=C9k5XsE8juV+OuxR2TwgA@mail.gmail.com>
References: <CAHAH3R7b23wDpsxw7-nFHrhZ22UB=C9k5XsE8juV+OuxR2TwgA@mail.gmail.com>
Message-ID: <694035c0-5a9e-440a-b1d3-10c287eef39d@gmail.com>

On 3/22/25 3:09 PM, Michael Deweerd via Fot wrote:
> Has anyone ever laid out the TR4 port sizes and dimensions?
> I?m wanting to know the distance between exhaust ports and the bolt 
> pattern to make my header.
> If anyone has a pdf drawing it would be appreciated.
> Cheers
> /Mike Deweerd/

/Some people have found my web site to be useful./

/http://www.tr3a.info/FAQ_heads.htm/

/TeriAnn
/
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From rkramer56 at gmail.com  Sun Mar 23 18:15:51 2025
From: rkramer56 at gmail.com (Bob Kramer Gmail)
Date: Sun, 23 Mar 2025 19:15:51 -0500
Subject: [Fot] TR4 head port dimensions
In-Reply-To: <694035c0-5a9e-440a-b1d3-10c287eef39d@gmail.com>
References: <694035c0-5a9e-440a-b1d3-10c287eef39d@gmail.com>
Message-ID: <61B25BDD-EDAC-4FDA-B611-584BF878DB82@gmail.com>

Many people!

You only get one chance at life, make it a TRIUMPH.

> On Mar 23, 2025, at 6:18?PM, TeriAnn J. Wakeman via Fot <fot at autox.team.net> wrote:
> 
> ?
> On 3/22/25 3:09 PM, Michael Deweerd via Fot wrote:
>> Has anyone ever laid out the TR4 port sizes and dimensions? 
>> I?m wanting to know the distance between exhaust ports and the bolt pattern to make my header. 
>> If anyone has a pdf drawing it would be appreciated. 
>> Cheers
>> Mike Deweerd
> Some people have found my web site to be useful.
> 
> http://www.tr3a.info/FAQ_heads.htm
> 
> TeriAnn
> 
> _______________________________________________
> fot at autox.team.net
> 
> http://www.fot-racing.com
> 
> Donate: http://www.team.net/donate.html
> Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/rkramer56 at gmail.com
> 
> 
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From dave at microworks.net  Mon Mar 24 21:49:26 2025
From: dave at microworks.net (Dave Riddle)
Date: Tue, 25 Mar 2025 03:49:26 +0000
Subject: [Fot] Gear ratio recommendations
Message-ID: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>

While we will be running the Toyota 5 speed in the TR4 at Lime Rock that gear box and engine are slated to go back in the BajaTR3 afterwards.  The motor that is being built for the TR4 is being mated to a 4-speed TR4 box that has been order.  Trying to determine what gear ratios to run in it.  Will have both a 3.71 and 4.11 final drive and the motor turning over at 6k with about 175 hp at the rear wheels.

Currently the Toyota boxes we have are running...

1st           3.950                    3.830
2nd          2.140                    2.060
3rd           1.38                       1.430
4th           1.00                       1.00
5th           0.810                    0.840

Anyone care to share the hot setup for a 4-speed TR4 box?

[MWLOGO-Signature]<http://www.microworks.net/>
Dave Riddle
Business IT Consulting
Office: 480.610.8234
Cell: 602.692.5276
eMail: dave at microworks.net<mailto:dave at microworks.net>
Website: http://www.microworks.net<http://www.microworks.net/>
[Microsoft-Partner-Network]<https://partner.microsoft.com/en-US/>[ace_1_orig]<https://www.acronis.com/en-us/>[CCCLogo]<https://www.clio.com/>[cityhosted-authorized-dealer_orig]<https://www.citycommunications.com/>

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From vfracing at aol.com  Tue Mar 25 04:41:17 2025
From: vfracing at aol.com (Philip Gott)
Date: Tue, 25 Mar 2025 06:41:17 -0400
Subject: [Fot] Gear ratio recommendations
In-Reply-To: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <A242DE2F-34AC-4817-83C4-65E76A3CD948@aol.com>

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From vfracing at aol.com  Tue Mar 25 04:50:46 2025
From: vfracing at aol.com (Philip Gott)
Date: Tue, 25 Mar 2025 06:50:46 -0400
Subject: [Fot] Gear ratio recommendations
In-Reply-To: <A242DE2F-34AC-4817-83C4-65E76A3CD948@aol.com>
References: <A242DE2F-34AC-4817-83C4-65E76A3CD948@aol.com>
Message-ID: <6153B4F8-ACD8-4DEA-874A-8B5FB52F9B20@aol.com>

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From triumphsix at yahoo.com  Tue Mar 25 04:53:57 2025
From: triumphsix at yahoo.com (David Gott)
Date: Tue, 25 Mar 2025 10:53:57 +0000 (UTC)
Subject: [Fot] Gear ratio recommendations
In-Reply-To: <A242DE2F-34AC-4817-83C4-65E76A3CD948@aol.com>
References: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
 <A242DE2F-34AC-4817-83C4-65E76A3CD948@aol.com>
Message-ID: <1811262330.842923.1742900037471@mail.yahoo.com>

Hi Dave,
At lime rock a 3.7 with stock ratios you will only use 3 and 4. ?When I lost the ability to downshift, I found I could still be within a second of pace just leaving it in 4th the whole way?. With an engine tuned for midrange power, shifting (when possible) at 6k. ? ?Bogging a little out of the esses. ?Probably taught me a lot when you take away options (how do I keep it in the rev. range???)? ?A true momentum track. ?I try to convince myself that I?m a freight train not having to shift while others go through 3 gears losing momentum each time?next to me down the straight. ? Did I mention I have rose colored glasses?
Dave Gott


Sent from Yahoo Mail for iPhone


On Tuesday, March 25, 2025, 6:46 AM, Philip Gott via Fot <fot at autox.team.net> wrote:

Dave;With that power and a 6k red line the 3.7 will do you just fine at Lime Rock assuming you have 23 inch tires.Phil Gott

Sent from my iPhone

On Mar 25, 2025, at 12:07?AM, Dave Riddle via Fot <fot at autox.team.net> wrote:



?
#yiv8038686006 filtered {}#yiv8038686006 filtered {}#yiv8038686006 p.yiv8038686006MsoNormal, #yiv8038686006 li.yiv8038686006MsoNormal, #yiv8038686006 div.yiv8038686006MsoNormal {margin:0in;font-size:12pt;font-family:Calibri, sans-serif;}#yiv8038686006 span.yiv8038686006EmailStyle17 {font-family:Calibri, sans-serif;color:windowtext;}#yiv8038686006 .yiv8038686006MsoChpDefault {}#yiv8038686006 filtered {}#yiv8038686006 div.yiv8038686006WordSection1 {}
While we will be running the Toyota 5 speed in the TR4 at Lime Rock that gear box and engine are slated to go back in the BajaTR3 afterwards.? The motor that is being built for the TR4 is being mated to a 4-speed TR4 box that has been order.? Trying to determine what gear ratios to run in it.? Will have both a 3.71 and 4.11 final drive and the motor turning over at 6k with about 175 hp at the rear wheels.
 
 ?
 
Currently the Toyota boxes we have are running?
 
 ?
 
1st?????????? 3.950??????????????????? 3.830
 
2nd????????? 2.140??????????????????? 2.060
 
3rd?????????? 1.38?????????????????????? 1.430
 
4th?????????? 1.00?????????????????????? 1.00
 
5th?????????? 0.810??????????????????? 0.840
 
 ?
 
Anyone care to share the hot setup for a 4-speed TR4 box?
 
 ?
 

<image001.jpg> 
Dave Riddle
 
Business IT Consulting
 
Office: 480.610.8234
 
Cell: 602.692.5276
 
eMail: dave at microworks.net
 
Website: http://www.microworks.net
 

<image002.png><image003.png><image004.png><image005.png>
 ?
 _______________________________________________
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From robertlangtr6 at yahoo.com  Tue Mar 25 06:20:56 2025
From: robertlangtr6 at yahoo.com (Robert Lang)
Date: Tue, 25 Mar 2025 12:20:56 +0000 (UTC)
Subject: [Fot] Gear ratio recommendations
In-Reply-To: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <118173538.173789.1742905256316@mail.yahoo.com>

 Not to beat a dead horse, but with your setup, the 4.10 would be the best bet. You'll use the 1:1 and the overdrive gears only.
Lime rock "standard" times for small bore production cars, lap average speeds are close to 90 MPH. Sidebar: the track has one of the highest if not the highest average lap speed for any track in the USofA. The slowest corner on the track is the exit of Big Bend and if you get the line perfect, you're at 65 to 70 MPH. The left hander is a tosser, so don't even try to gear for that. The most critical corner is West Bend because you carry that "Mo" all the way to the entry to Big Bend.
I'll also +1 the tire diameter - I assume 23" - 24" diameter tires with a nod towards 24". Smaller than that, you need the 3.70, for sure.
Regards,Bob Lang
    On Monday, March 24, 2025 at 11:59:39 PM EDT, Dave Riddle via Fot <fot at autox.team.net> wrote:  
 
  
While we will be running the Toyota 5 speed in the TR4 at Lime Rock that gear box and engine are slated to go back in the BajaTR3 afterwards.? The motor that is being built for the TR4 is being mated to a 4-speed TR4 box that has been order.? Trying to determine what gear ratios to run in it.? Will have both a 3.71 and 4.11 final drive and the motor turning over at 6k with about 175 hp at the rear wheels.
 
 ?
 
Currently the Toyota boxes we have are running?
 
 ?
 
1st?????????? 3.950??????????????????? 3.830
 
2nd????????? 2.140??????????????????? 2.060
 
3rd?????????? 1.38?????????????????????? 1.430
 
4th?????????? 1.00?????????????????????? 1.00
 
5th?????????? 0.810??????????????????? 0.840
 
 ?
 
Anyone care to share the hot setup for a 4-speed TR4 box?
 
 ?
 

 
Dave Riddle
 
Business IT Consulting
 
Office: 480.610.8234
 
Cell: 602.692.5276
 
eMail: dave at microworks.net
 
Website: http://www.microworks.net
 

 
 ?
 _______________________________________________
fot at autox.team.net

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From cartravel at pobox.com  Tue Mar 25 09:37:09 2025
From: cartravel at pobox.com (Larry Young)
Date: Tue, 25 Mar 2025 10:37:09 -0500
Subject: [Fot] Gear ratio recommendations
In-Reply-To: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
References: <SN7PR14MB7043A6A0113192AC55A11CAAB5A72@SN7PR14MB7043.namprd14.prod.outlook.com>
Message-ID: <6f52839b-06c0-4e27-9cec-4479a7dd3655@pobox.com>

I tried a bunch of arrangements when I raced my TR3. I agree that you 
want something close to a standard 3.7 final drive. My favorite setup 
was close ratio 4 speed, A-type overdrive and 4.55 rear. The 0.82 
overdrive gives 3.73 in 4th overdrive. Your overdrive ratio is similar. 
- Larry Young

On 3/24/2025 10:49 PM, Dave Riddle via Fot wrote:
>
> While we will be running the Toyota 5 speed in the TR4 at Lime Rock 
> that gear box and engine are slated to go back in the BajaTR3 
> afterwards.? The motor that is being built for the TR4 is being mated 
> to a 4-speed TR4 box that has been order.? Trying to determine what 
> gear ratios to run in it. Will have both a 3.71 and 4.11 final drive 
> and the motor turning over at 6k with about 175 hp at the rear wheels.
>
> Currently the Toyota boxes we have are running?
>
> 1^st 3.950??????????????????? 3.830
>
> 2^nd 2.140??????????????????? 2.060
>
> 3^rd 1.38?????????????????????? 1.430
>
> 4^th 1.00?????????????????????? 1.00
>
> 5^th 0.810??????????????????? 0.840
>
> Anyone care to share the hot setup for a 4-speed TR4 box?
>
> MWLOGO-Signature <http://www.microworks.net/>
>
> *Dave Riddle*
>
> Business IT Consulting
>
> Office: 480.610.8234
>
> Cell: 602.692.5276
>
> eMail: dave at microworks.net <mailto:dave at microworks.net>
>
> Website: http://www.microworks.net <http://www.microworks.net/>
>
> Microsoft-Partner-Network 
> <https://partner.microsoft.com/en-US/>ace_1_orig 
> <https://www.acronis.com/en-us/>CCCLogo 
> <https://www.clio.com/>cityhosted-authorized-dealer_orig 
> <https://www.citycommunications.com/>
>
>
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate:http://www.team.net/donate.html
> Archive:http://autox.team.net/archive http://www.team.net/pipermail/fot
> Unsubscribe/Manage:http://autox.team.net/mailman/options/fot/cartravel at pobox.com
>
>
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From fhoustonsmith at gmail.com  Fri Mar 28 19:21:06 2025
From: fhoustonsmith at gmail.com (F.Houston Smith)
Date: Fri, 28 Mar 2025 21:21:06 -0400
Subject: [Fot] Spitfire SCCA GP for sale
Message-ID: <E0C0AF2B-A572-41BD-8A32-FE4F8E2C9C22@gmail.com>

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From trmarty at hotmail.com  Sat Mar 29 06:54:20 2025
From: trmarty at hotmail.com (marty sukey)
Date: Sat, 29 Mar 2025 12:54:20 +0000
Subject: [Fot] PVGP Triumph/MG Challenge
In-Reply-To: <LV8PR84MB396527005E631F4780B70359BAF92@LV8PR84MB3965.NAMPRD84.PROD.OUTLOOK.COM>
References: <LV8PR84MB396527005E631F4780B70359BAF92@LV8PR84MB3965.NAMPRD84.PROD.OUTLOOK.COM>
Message-ID: <IA2PR84MB3951881ADEC87A6DCBE90589BAA32@IA2PR84MB3951.NAMPRD84.PROD.OUTLOOK.COM>

Just a heads up. The early registration discount for the PVGP ends 3/30/25.

Marty
________________________________
From: Fot <fot-bounces at autox.team.net> on behalf of marty sukey via Fot <fot at autox.team.net>
Sent: Friday, February 14, 2025 8:21 PM
To: FOT <fot at autox.team.net>
Subject: [Fot] PVGP Triumph/MG Challenge

Registration for the Pittsburg Vintage Gran Prix at Pittrace is now open. Be sure to check the box for the Triumph/MG challenge when you register. It looks like we will get eight total track sessions throughout the weekend with one Saturday and one Sunday being Triumph/MG only races. If we get a big enough turnout PVGP is interested in this being a recurring event added to the schedule.  We have reserved most of the South Paddock reserved electric RV spots for Triumphs. I think there are a couple still available. Let me know if you want one.  This should be a hoot.

Marty Sukey
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From david.c.cutter at gmail.com  Sat Mar 29 11:19:53 2025
From: david.c.cutter at gmail.com (David Cutter)
Date: Sat, 29 Mar 2025 13:19:53 -0400
Subject: [Fot] Fidanza flywheel 172551 for GT6.
Message-ID: <CAC5qWeB1HnsReJvFwdo-JaOaUpFdGzvqL-9_dSt9e09Hh7DraQ@mail.gmail.com>

Looking for a Fidanza 172551 flywheel for the GT6.  All the usual sources
are backordered.

Anyone have an extra on their parts shelf that they would be willing to
part with?

Thanks, Dave
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From vintageclassicsus at outlook.com  Sat Mar 29 14:47:14 2025
From: vintageclassicsus at outlook.com (Tony Garmey)
Date: Sat, 29 Mar 2025 20:47:14 +0000
Subject: [Fot] Spitfire wheels F/S
Message-ID: <SA1P220MB165635EA3D63ABB80CFFFF77ABA32@SA1P220MB1656.NAMP220.PROD.OUTLOOK.COM>

G?day :-)

A set of 4 , panasports -
13 x 5
3 3/4 PCD
Back space @  31/2

They show some wear in tear ( there not perfect)

Asking 550 for the set .
Willing to ship at cost !

Cheers
Tony Garmey

[IMG_4953.jpg]


[IMG_4952.jpg]

Sent from my iPhone
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From sjanzen at me.com  Mon Mar 31 08:33:42 2025
From: sjanzen at me.com (Scott Janzen)
Date: Mon, 31 Mar 2025 10:33:42 -0400
Subject: [Fot] GT6/Spitfire Wheels for Sale
References: <CEE89261-8019-43D9-AD88-BDFA37A6CC39@me.com>
Message-ID: <9FDA588E-29CF-47FA-BC13-0649580ED0F4@me.com>

Four wheels for sale.  GT6 or Spitfire.
3.75? dia mounting stud circle
13? x. 5.5?
Backspace - 4? to edge of rim, 3.5? to inside tire bead surface
$500 for the set

These came with a project car I recently got.  They are freshly refinished, like new condition, tires never mounted, very high quality finish.  I was told they are Cosmics, but there are no markings on them and they look more like wheels that originally might have been on a Lotus.

Have good boxes and can ship, or I will be at the Jefferson 500 in May, Lime Rock in June and Pittrace in July.

Scott Janzen
215-817-9315



Sent from my iPhone

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From trmarty at hotmail.com  Mon Mar 31 09:25:54 2025
From: trmarty at hotmail.com (marty sukey)
Date: Mon, 31 Mar 2025 15:25:54 +0000
Subject: [Fot] PVGP TR/MG Challenge
Message-ID: <IA2PR84MB39513465353560B2BEDCDF8EBAAD2@IA2PR84MB3951.NAMPRD84.PROD.OUTLOOK.COM>

With 3-1/2 months to go there are already 25 entrants in the Triumph/MG challenge race at the PittRace PVGP. This should be a blast. Grid is equal Triumphs vs MGs currently. The PVGP staff is planning some special stuff for this race. I will update as plans come together. Come join us.

Marty Sukey
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From mark at bradakis.com  Mon Mar 31 10:25:28 2025
From: mark at bradakis.com (Mark Bradakis)
Date: Mon, 31 Mar 2025 10:25:28 -0600
Subject: [Fot] GT6/Spitfire Wheels for Sale
In-Reply-To: <9FDA588E-29CF-47FA-BC13-0649580ED0F4@me.com>
References: <CEE89261-8019-43D9-AD88-BDFA37A6CC39@me.com>
 <9FDA588E-29CF-47FA-BC13-0649580ED0F4@me.com>
Message-ID: <ed0982cf-11c0-431f-9345-69ff0e0f6eb9@bradakis.com>

Wheels look good!   Not something you see every day.  But I don't have 
any running Spitfires at the moment, though I hope to remedy that 
situation before the end of summer.  But I am rethinking just what I can 
actually get done, may be unloading some of my stuff soon.  Stay tuned 
for some shameless self promotion parts selling!

mjb.