[Fot] TR6 motor rebuild

[Charly Mitchel]

Greg, great information.  I've looked in to getting Venolia pistons at about 
$100 a piece and I've been thinking along the lines of using the stock rods. 
I have the whole selection of Kas' books and plan to do the lightening as he 
recommends.  Where do I find info on the Cosworth pistons? Are they 
available in the USA?
Thanks, Charly Mitchel
TR6 #44
----- Original Message ----- 
From: "greg" <gtlund at cyberspeedway.net>
To: "Charly Mitchel" <charly at mitchelplumbing.com>
Cc: "FOT LIST" <fot at autox.team.net>
Sent: Friday, December 14, 2007 4:06 PM
Subject: Re: [Fot] TR6 motor rebuild


> Charly,
>      The TR6 rod is fine if you follow Kas' comp prep instructions and 
> shot peen them. We used to shift at 7600 rpm and the rods never gave a 
> problem. Carrillo rods used to use 1/4" rod bolts and the only people I 
> know who broke TR6 rods were Carrillo users. Carrillo did this because 
> they didn't/wouldn't split the rods on a diagonal and there isn't any room 
> for bigger bolts on a conventional pattern rod due to the small bore of a 
> TR6. I had talked with Crower at one point and they thought they could use 
> 9/32" or 5/16" bolts. I also investigated Pauter and at the time they 
> thought they could do a diagonal split rod. The piston acceleration on a 
> TR6 is brutal because of the long stroke short rod combination. At 7000 
> rpm it is about the same as a 4" x 3" small block Chevy at 10,000 rpm.
>      First choice for pistons is Cosworth. We ran one set for 12 years, 
> 6-8 races a year. Arias is good too but the Cosworths fit the best at 
> temperature.
> Greg Lund
> Charly Mitchel wrote:
>> FoT,
>> I'm starting the rebuild on another TR6 racing motor and I'm looking for 
>> a
>> little input as to which parts I should be using.  I'll be running a CR 
>> of
>> about 11.5:1, have a KB cam and a stock crankshaft with Cambridge 
>> flywheel.
>> I'll be using the Lucas PI setup and will have a Tilton clutch.
>> I know I'll need to go to some better pistons than stock and will 
>> probably use
>> Venolia pistons.
>> Anybody got any suggestions on pistons and rods?  Is there a connecting 
>> rod
>> from another manufacturer that will take the place of a TR6 rod that is
>> better?
>> Thanks
>> Charly Mitchel
>> TR6 #44
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