Ill second that. I would make sure the fuel pressure at the carbs is 1 1/2- 2
psi. ZS carbs do not like higher fuel pressure than that and will miss every
time a little too much fuel gets pushed past the float needle valves.
In fact it would be the first thing Id correct because all the tuning and
replacing parts wont fix too high of fuel pressure. I chased my tail for
longer than Id like to admit before I figured out high fuel pressure was
causing a miss on my 6.
Put a fuel pressure regulator on and test your pressure with a vacuum gage to
get it right, then do all the other things that have been suggested by the
list. Dont trust the numbers on the fuel pressure regulator they are not
accurate. Use a vacuum gage to set it.
Bud Rolofson
Extreme Parts Racing (more than just a haircut)
71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
On Oct 28, 2014, at 7:42 AM, Jason Ostrowski <jason@multivintage.com> wrote:
> It would also be good to start with 2psi fuel pressure. Typically, a the
> closer range is between 1 1/2 to 2 1/2. We run 2 psi and it is most likely
> that 3 is too much.
> good luck.
> Jason Ostrowski
> Friendly Ghost Racing
> On Tue, Oct 28, 2014 at 8:34 AM, <jeffwhall@aol.com> wrote:
>
>> Jason,
>>
>> I will go from scratch and "re-do" the items you suggest.
>>
>> Thanx,
>>
>> Jeffrey W. Hall
>>
>>
>> -----Original Message-----
>> From: jason <jason@multivintage.com>
>> To: jeffwhall <jeffwhall@aol.com>; jhasty <jhasty@mhc-law.com>
>> Cc: fot-bounces <fot-bounces@autox.team.net>; Fot <fot@autox.team.net>
>> Sent: Mon, Oct 27, 2014 7:58 pm
>> Subject: Re: [Fot] Stromberg Carb tuning
>>
>> What kind of fuel pump? Check all the all the throttle and idle
>> adjustments, there is a certain sequence to setting up the idle and doing
>> the initial setup of several intermingling parts. Did your guy set that
all
>> up for the GT6? I don't have the factory manual in front of me but there
is
>> all kinds of specific turns out to start at like three turns out for one
>> screw and theres all sorts of sequences for setting various stuff that
have
>> to do with the throttle stop screw? Did you follow that when you put them
>> back on? Some stuff is done cold and some is while hot and then you twist
>> it in to a certain rpm. I'd try to do that whole set procedure by the
book.
>> But perhaps you already did that? If not, let me know if you need the
>> guide..
>> Jason Ostrowski
>> Friendly Ghost Racing
>> Sent via BlackBerry by AT&T
>> ------------------------------
>> *From: *jeffwhall@aol.com
>> *Date: *Mon, 27 Oct 2014 21:18:50 -0400
>> *To: *<jhasty@mhc-law.com>; <jason@multivintage.com>
>> *Cc: *<fot-bounces@autox.team.net>; <fot@autox.team.net>
>> *Subject: *Re: [Fot] Stromberg Carb tuning
>>
>> 20 weight oil check, pistons fall evenly and click check, All emissions
>> controls holes blocked? Check, camshaft timing,
>>> ignition timing, valve adjustments, etc? engine was rebuilt and timing
>> advanced.
>>
>> Jeffrey W. Hall
>>
>>
>> -----Original Message-----
>> From: John Hasty <jhasty@mhc-law.com>
>> To: <jason@multivintage.com> <jason@multivintage.com>
>> Cc: Fot <fot-bounces@autox.team.net>; Fot <fot@autox.team.net>
>> Sent: Mon, Oct 27, 2014 6:49 pm
>> Subject: Re: [Fot] Stromberg Carb tuning
>>
>> Gee whiz, was it really 27? We felt put upon at 59 in Savannah, actually
had
>> to put on a long sleeve shirt.
>>
>> Sent from my iPhone
>>
>>> On Oct 27, 2014, at 7:04 PM, "jason@multivintage.com"
>> <jason@multivintage.com> wrote:
>>>
>>> What happens when you hold the pistons up and let them fall? They shoul
both
>> fall evenly and all the way down and click when it falls to the bottom?
This
>> simple check can eliminate several possible problems.
>>> Jason Ostrowski
>>> Friendly Ghost Racing
>>> Sent via BlackBerry by AT&T
>>>
>>> -----Original Message-----
>>> From: Duncan Charlton <duncan.charlton54@gmail.com>
>>> Sender: "Fot" <fot-bounces@autox.team.net>Date: Mon, 27 Oct 2014 16:56:45
>>> To: <fot@autox.team.net>
>>> Subject: Re: [Fot] Stromberg Carb tuning
>>>
>>> 20 weight oil in the dampers? Damper pistons have intact rings? Damper
>>> covers screwed down evenly? All emissions controls holes blocked? No
>>> other coincidental changes to the engine such as camshaft timing,
>>> ignition timing, valve adjustments, etc? I have one SU on a TR street
>>> engine that does this slightly, so I'm hoping we'll hear a few more
ideas.
>>>
>>> Duncan
>>> (Texas)
>>>
>>>> On 10/27/14, 3:48 PM, jeffwhall@aol.com wrote:
>>>> I have a major tuning challenge on my 1971 GT6. The Stromberg carbs are
>> WAY
>>>> out of calibration. I just had them rebuilt by a professional, the fuel
>>>> pressure is 3 PSI. As I run the car the pistons move up and down
>> continuously.
>>>> Can anyone give advice on what to do?
>>>>
>>>> Jeffrey W. Hall
>>>>
>>>>
>>>> -----Original
>>>> Message-----
>>>> From: Diesel Performance Parts - Info
>>>> <info@dieselperformanceparts.com>
>>>> To: 'damys@charter.net' <damys@charter.net>
>>>> Cc: 'fot@autox.team.net' <fot@autox.team.net>
>>>> Sent: Mon, Oct 27, 2014 11:34 am
>>>> Subject: Re: [Fot] GT6 transmission
>>>>
>>>>
>>>> Dave & Alex,
>>>>
>>>> Taylor Race in Texas can
>>>> set you up with a Quaife dog ring box that bolts in
>>>> and should last as long as
>>>> you do. Ratios are available in anything you want
>>>> too. More than 3400.00 but
>>>> less than driving 8 hours to race and only making
>>>> one session.
>>>>
>>>> Mark Craig
>>>> Diesel Performance Parts, INC.
>>>> 411 Allied Drive
>>>> Nashville, TN 37211
>>>> 866-455-7788 Phone
>>>> 615-834-9923 Fax
>>>>
>>>> www.dieselperformanceparts.com
>>>> -----Original Message-----
>>>> From: Fot [mailto:fot-bounces@autox.team.net] On
>>>> Behalf Of damys@charter.net
>>>> Sent: Sunday, October 26, 2014 7:30 PM
>>>> To:
>>>> fot@autox.team.net
>>>> Subject: [Fot] GT6 transmission
>>>>
>>>> Looking for advice on a
>>>> transmission upgrade for the GT6. I've spoken with
>>>> Quantum Mechanics and they
>>>> offer four options. Standard GT6 box, upgraded GT6
>>>> box with TR7 gears, a TR6
>>>> trans mod and the T9 option. My fear with the GT6
>>>> option is the constant
>>>> rebuilding, although I understand it offers the best
>>>> ratios. The best seems
>>>> to be the T9, but
>>>> $3400 is a lot especially considering the other costs of
>>>> building a racecar
>>>> from the ground up If the T9 is the best, would it be a
>>>> sound move to go with
>>>> a lower diff ratio to be able to utilize 5th gear, or
>>>> stick with the 3.27:1.
>>>> Thanks
>>>> Dave and Alex
>>>> _______________________________________________
>>>> fot@autox.team.net
>>>> http://www.fot-racing.com
>>>>
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4@gmail.com
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ge.com
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om
>> _______________________________________________fot@autox.team.net
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