In a message dated 5/21/01 10:33:17 PM Pacific Daylight Time,
spitlist@gte.net writes:
<< So anyone running SU's please share any tips you have that will help. >>
Hi Joe,
I am sure that smoothing out the inside of your carbs will not hurt, but
anything else may or may not help. I am going to copy and paste in some old
Jack Wheeler information:
<<Subj: RE: spitfire SU needles - need help
Date: 4/26/00 1:55:12 PM Pacific Daylight Time
From: jwheeler@seidata.com (Jack Wheeler)
Sender: owner-fot@autox.team.net
Reply-to: jwheeler@seidata.com (Jack Wheeler)
To: matthews-home@worldnet.att.net ('Janice/Matt Matthews')
CC: fot@autox.team.net ('FOT')
------ =_NextPart_000_01BFAF97.760F4D20
I raced a TR-4 with 1 3/4" SU's in SCCA for 24 years. Over the years I did
a lot of modifications to the carburetors including, rounding off the outer
edge of the piston, grinding off the bridge where the fuel comes up into
the carb. body, and opening up the outer diameter of the carb. body. We
did many dyno runs and quite a bit of flow bench work. The conclusion I
finally came to after all of these trials is that the factory had it right.
The best combination I found was stock pistons and carb bodies with no
modifications whatsoever to these components. I used RB needles, but I'm
sure this won't correlate to your 1300 setup. Good luck.>>
Subj: Re: spitfire SU needles - need help
Date: 4/27/00 8:35:16 AM Pacific Daylight Time
From: WEmery7451
To: jwheeler@seidata.com
In a message dated 4/26/00 1:55:12 PM Pacific Daylight Time,
jwheeler@seidata.com writes:
Hi Jack,
Did the carburetors you had Dick Stockton set up not do you any good? Did
you have a stock set of carburetors on your car when you won the run-offs?
Many years ago, I bought a supposedly race prepared set of carburetors from
Ed Wasnewski at the Ledges. As it turned out, I had to swap pieces from my
carburetors with his carburetors to get rid of sloppy linkage and enlarged
wear holes in the casting. My pistons are rounded off in the front. Should
I go back to stock pistons?
In the late 60's, Bob Stanford found out that he gained another six
horsepower on a dyno by removing rich needles and reinstalling stock Triumph
needles.
Any information will be appreciated.
Bill Emery
Subj: RE: spitfire SU needles - need help
Date: 4/27/00 11:45:59 AM Pacific Daylight Time
From: jwheeler@seidata.com (Jack Wheeler)
Sender: owner-fot@autox.team.net
Reply-to: jwheeler@seidata.com (Jack Wheeler)
To: WEmery7451@aol.com ('WEmery7451@aol.com')
CC: fot@autox.team.net ('FOT')
------ =_NextPart_000_01BFB04E.9D6F06A0
Bill,
Dick was one of the people who suggested I go back to stock pistons
and bodies. The carbs he did for me were on the car when I won the
runoffs, and they had stock (unmodified) pistons & bodies. Based on my
experience and the flow bench work Dick did, I strongly recommend this
setup.
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