Siamesed Runner TPI Questions...

[Doug Dayson]

Hi All...

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?

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?

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

TIA...

Doug

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org