M1, Victor340, and RPM Air Gap flow testing

mgoblue9798 said

So at what point do you make the call to go from the air gap to a single plane for a mostly street driven engine?

Lets say eddy heads/or eq heads that flow about 260 @.600 are on the hypothetical engine. 340 or 360 engine.

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Years ago I ran a stock stroke 340, 11.4-1, Edelbrock's that flowed in the mid 290's, 236/242° @ .050" hydraulic and a Weiand X-cellerator. For that engine the Weiand was a good fit. An Air Gap would be better for something with less head, cam, compression and gear. If I was running 3.55 gears I'd run the Air Gap, with 3.91's a smaller single plane like the X-cellerator would be tempting.