The author of the summary below on the "Order of Choice" is Jack Drews, just
to keep the record straight. Joe (A)
> I have been communicating with Joe Alexander regarding induction for my
> some-time to be TR250 vintage race car. I asked what would be
> preferred -- 2 SUs or 2 Strombergs.
> Here is his reply [maybe from a digest mode]
> "So the order of choice is 1 - late SU's, 2 - early SU's, 3 - Stroms
>
> Now the reason that nobody with a vintage TR6 uses any of the above is
> that the stock intake manifold absolutely kills intake flow. It is just
> awful. That's the reason everybody running TR6's use Webers. TR6 intake
> ports are very restrictive, and putting the stock manifold on it kills it.
>
> If Webers not a choice, I'd get the Richard Good three carb manifold
> without the Stroms he sells and put SU's on in their place. A few
> purists might wince, but nobody in a club like VSCDA would care. Just an
> opinion, but I think a TR6 with two carbs on a stock manifold would be
> beaten by every TR4 on the track. But if the owner can't afford Webers,
> go with it".
>
> Unfortunately, SOVERN, the vintage group whom I will be racing under
> requires the car to be setup to the 1969 SCCA regulations. According to
> their site, this means 1.75 Strombergs or SUs [no mention of PI, though
> Kas has related to me that that was the only way the factory raced
> them].
>
> So, to the collected group:
> What carbs give me the most gas? Is there anything [visibly legal] that
> can be done to improve the intake manifold's flow?
>
> Thanks,
> Chuck
|