Siamesed Runner TPI Questions...

[Bruce]

> Researching EFI updates for 71 Vette with 406/400. 218 @ .050 110 LSA flat
hyd
> cam with TFS Twisted Wedge heads and headers etc, currently a well-dialed
Q-Jet
> and Performer dual-plane (hood clearence). Power peak is at 5200 rpm and
the
> torque peak is about 4000 rpm.
> So, since TPI stuff is cheap I was wondering how siamesed runners would
effect
> the power curve?

Just the oem stuff.

> A stock or big tube TPI (with big manifold base) will kill power over 4500
rpm
> with a 406ci, but I'd think that the siamesed runners would behave more
like
> the shorter runners of the Lingenfelter/Accel Super Ram as they're
partially
> open etc. What do Ya'll think?

Still no plenum volume.
If you happy with what you have how about, a TBI?.
Maybe a  Weiand 7527, or 7546 manifold, then up grade one of them to TPI if
you want to progress further.

> Would a Big Manifold Base/TB Siamesed Runner TPI set-up be able to support
a
> 406ci through 5600 rpm?

Would be a real push to even try
Bruce
> TIA...
> Doug

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