That's the common wisdom alright, and Robert's setup sure looks great,
but its's hard for me to justify the price of the Maniflow intake
manifold. We are not running full race cams and max compression, and I
like to think that the factory log problems can be mitigated somewhat.
There are some awful powerful SCCA 1275's that seem to prove that. I
started with the HS2 manifold and made some nice O-ringed adapters to
mount the HS4's, but am working on the B manifold now. The HS2 manifold
can't be opened up large enough at the mounting flange without welding
to take advantage of the larger carbs IMO, although it might just work
fine for the street. The early 1-1/2 carbs even had the same bolt
pattern as the 1-1/4's.
John
Fogelsville, PA
derf wrote:
> Since your "bottleneck" will probably be at the head/manifold
> attachment point, it would probably be possible to open up a dual
> 1-1/4 SU intake to facilitate dual 1-1/2 SUs.
> Just about any aftermarket manifold is better than factory dog/log.
>
> Also, it seems as though you can mount two 1-1/2 SUs on a Weber DCOE
> intake, albeit close together and you may need to drill extra holes or
> add something to bolt the carbs to.
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