[Stan Weiss]

Originally Posted by 25stevem

Did you confirm that the carb was opening all the way, because even with headers that vacuum reading of about -.8 says that you could use more cfm, at or above 4300 rpm, especially once those numbers get above -1.1!
At .8 your motor is now starting to work at pulling air in instead of atmospheric pressure pumping it in.

Steve,
Maybe we need a clarification here. That heading says Pan and not Manifold.

Stan