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Re: [Fot] GT6 carburetors

To: Jason Ostrowski <jason@multivintage.com> engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-10_02,2025-04-08_04,2024-11-22_01 clxscore=1015 mlxscore=0 bulkscore=0 malwarescore=0 mlxlogscore=999 suspectscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2308100000 definitions=main-2504100087
Subject: Re: [Fot] GT6 carburetors
From: Scott Janzen via Fot <fot@autox.team.net>
Date: Thu, 10 Apr 2025 07:58:20 -0400
Cc: DENNIS DELAP via Fot <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <9B8A59FF-C31E-431F-A290-3B17429BBCD4@multivintage.com>
Great history!  I know mine never ran that way back in the day. It came to me 
with twin SUs.
Sent from my iPhone

> On Apr 9, 2025, at 10:35â?¯PM, Jason Ostrowski <jason@multivintage.com> wrote:
> 
> SVRA actually did a pretty good job with their current classification of 
> the GT6. The choices they make in the classification compared to  other cars 
> (in the same class) favor the GT6.
> Why? Because SVRA references the 1967 SCCA regulations for class approval for 
> group 3.
> 
> Original SCCA classification had the GT6 in E production where it was 
> particularly dominate. Not many cars were prepared for National SCCA 
> competition in the first few years of the new 6 cylinder beast. (Like less 
> than 10 quality SCCA cars  until the 1969 season).
> At the end of 1969 and after a banner year of regional and national wins, the 
> car was reclassified after the ARRC at Daytona.
> So for the start of the 1970 season- and ever after,  the GT6 was in D 
> production.
> 
> With the most general sense of reason, and for the sake of a true and 
> accurate Base for â??Period Correct classificationâ??â?¦.  
> the Triumph GT6 is a D production car and it should run prepared to at or 
> about the 1972 SCCA rules as such.
> Most importantly; with a stock appearing manifold with no more than 2 
> throats. Stromberg or S.U. 1.5 â?? to 1.75â??
> To Jason Sukeyâ??s point outâ?¦ no penalty for an enlarged size of a dual 
> carb set-up. (Iâ??m all in on that footnote)
> 
> As far as a triple Webber set-up; with a custom manifold.
> That is a totally different scenario and  was never on these cars in the in 
> the first decades of competition. (Nice try, but Sorry Scott your GT6 
> didnâ??t have those Webers on it when it was campaigning for the SCCA DP 
> national championship).
> The only exception would be the Dolanâ??s group 44 car which actually ran in 
> GTU under IMSA rules at the hand of the Great Ted Schumacher!
> And, with every trick thrown at it; Itâ??s simply a bump in class.
> Intake Manifold modification, and or extra carbs. = C Production
> Lots of other mods = C production
> IMSA GTU type GT6= C prod.
> A modern E production SCCA well built car  like Anthony Parkerâ??s = C 
> production.
> For the record, I donâ??t care what type of GT6 you build or race.
> I love them all.
> But if we are to be fair to the original cars, certain modifications should 
> be evaluated.
> I see 2 types of GT6 race cars that  Iâ??d like to campaign .
> 1) almost period correct = DP
> 2) unlimited =CP.
> Any type of GT6 is eligible to win the Kastner cup.
> But All GT6 entries are eligible for a public stoning if they are found to be 
> slow.
> 
> Jason Ostrowski
> Friendly Ghost Racing
> 1969 Triumph GT6+ racecars
> 
> 
> 
> 
> 
> Sent from my iPhone
> 
>> On Apr 9, 2025, at 5:41 PM, Scott Janzen <sjanzen@me.com> wrote:
>> 
>> That may be true- the penalty bit, but Iâ??ve been running triple Weber 
>> 40s in Vintage for years. Even with that, a well prepared Tr4 is at least a 
>> match for my car. I run the Webers because once theyâ??re set up theyâ??re 
>> bulletproof, and I have to admit, I love the way they look.
>> Iâ??m not sure from a performance standpoint they offer a huge edge.
>> 
>> Sent from my iPhone
>> 
>>>> On Apr 9, 2025, at 6:24â?¯PM, Jason Ostrowski via Fot <fot@autox.team.net> 
>>>> wrote:
>>> 
>>> No.
>>> The GT6 always was sold with the 1.50 strombergs.
>>> The Only difference in GT6 carbs relates to style for various emission 
>>> requirements.
>>> And contrary to popular belief the 1:5â?? set of carbs (for all GT6 
>>> racecars) are the only style allowed in both Modern and Vintage rules 
>>> without some kind of corresponding class change or weight penalty.
>>> Jason Ostrowski
>>> Friendly Ghost Racing
>>> 1969 GT6+  racecars
>>> Sent from my iPhone
>>> 
>>>>> On Apr 9, 2025, at 1:55 PM, DENNIS DELAP via Fot <fot@autox.team.net> 
>>>>> wrote:
>>>> 
>>>> A M I C I
>>>> Iâ??ve got a question for the GT6 folks in the group. Was the larger 1 
>>>> 3/4â?? carburetor fitted to the GT6 towards the end of its run?
>>>> Thanks
>>>> Dennis
>>>> Sent from my iPhone
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