John, sorry to be late in replying but you are absolutely correct. One of the
best small engine builders/cylinder head shops was a company called Comptune
here in Ohio. Dave Tabor was the owner and all round everything. For years
they had an extremely high percentage of SCCA run-off's winners - everything
from MGB's to B and C sedan Datsun's. Dave said he alway got more power from
the 1 3/4" SU's (HS6) than the 2" . Problem was the cars that were eligible for
2" were not allowed to use the 1 3/4". Ted
"R. John Lye" wrote:
> Hi Richard,
> I'm (obviously) not Jack, but I can tell you of our experience trying
> to get 2" SU's to work on Chip Bond's E-Prod TR-4. He spent a lot of
> dyno time with those carbs, and the engine was making more and more
> horsepower on the dyno and going slower and slower on track. My take
> on it is that the engine was making more power at the top end, but was
> giving up so much driveability that his lap times were suffering badly.
> We ended up going back to 1 3/4" SU's and he went faster again.
>
> I hope that helps,
>
> R. John Lye
>
> rjl6n@cstone.net
--
Ted Schumacher
<tedtsimx@bright.net>
TS Imported Automotive
108 S. Jefferson St.
Pandora, Ohio, USA 45877
Ph. 800/543-6648 USA/Canada FAX 419/384-3272 24 hour
Ph. 419/384-3022 - tech./general information
Web page http://www.tsimportedautomotive.com
New-Used-Rebuilt-NOS-Performance British car parts.
200 - 300 parts cars in our British-only salvage yard.
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