318 running with low power - dyno

Dragonbat13 said

I am not in the know on the action plus intake. Is it the same as the performer, or are the runners enlarged to 360 size? Reason I ask is for one I am planning on using the same intake, but on magnum heads. If the original heads have the smaller intake ports that would make for a restriction between the intake and the heads. I may be wrong, but I would think that would be somewhat of a factor.

Also, would a thermoquad work better for his setup?

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I would match the intake with what kind of carb that you are going to run.

You loose flow energy when you use adapters.

The Action Plus is made for a spreadbore carb, and has a power band from idle - 6000 RPM.

The Stealth is made for a square bore carb and has a power band from idle - 6800 RPM.

I like wiand dual planes over the performer. They have a wider RPM range and wiand makes a good casting. I've seen less core shift on wiand and offy intakes than I've seen on Edelbrock.

Also when you use a dual plane intake, use a split gasket to keep the stronger pulse all the way to the carburetor for stronger off line performance.