DIY_EFI Digest V4 #606 Re: Intakes
rpettibo at hpubs.com
rpettibo at hpubs.com
Wed Oct 27 21:17:26 GMT 1999
On the issue of single vs dual plane, I converted a 383 Chevy from a
Edelbrock Performer RPM (Dual Plane) and Holley 750 (#3310) to an EFI
using a Victor JR with sequential port injectors. Torque increased over
50 lb/ft and HP by 30. Both set ups were dyno tuned. From my experience
the best air-flowing manifold is the one to go with for EFI applications.
I know the runners on the Victor flow much better than the Performer on the
flowbench. I don't remember what the numbers were but it was significant.
The other VERY interesting thing about this conversion was an increase in
maifold vacuum. With the carb I ran 12" at idle, which is about right with
my solid roller cam (244in, 249ex @ 050 and 555 lift). With the fuel
injection I am at 15.8 - 16". Anybody see this on other applications? I
still find it hard to believe.
One thing is for sure injection is worth the price of admission.
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