Holley Contender

ploughman · #1 (**permalink**) 05-27-2003, 02:48 PM

I have a holley contender inlet manifold (Dual plane?) on my chevy 350 powered cobra but can find very little information on it. Can anyone help? Is it a good manifold? Should I change it for a single plane. Any info appreciated

Mike (UK)

Cobra20646 · #2 (**permalink**) 05-27-2003, 05:11 PM

Mike,

It's been my understanding that single plane manifolds are more at home on an engine that will spend a lot of time in the upper RPM ranges, i.e. racing environment. Dual plane manifolds are more for everyday street use. As for your specific manifold, I can't help you there, sorry

- Jim -

George Snyder · #3 (**permalink**) 05-27-2003, 08:54 PM

I will agree with Jim.

If you know what cam is in the engine, add up the total over lap when adding both the intake and exhaust together.
A good rule used for a performance cam choice in a 350 for the street is 50 to 70. 70 equalling at the ratical, unstreetable edge

Unless you have say 65 or higher or the need for higher performance in the 5k + rpm range I would stay with a dual plane. Most people experiance better drive ability and crisper throttle response with a dual plane.

Sorry, can't answer your question about your intake. I would suggest you contact Holley Tech Services and ask for any Old Fart. I am assuming that intake may have some years on it, but i am not sure.
Bud

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