About 5 years ago, Florida Phil asked if he should consider swapping his ECZ-B intake for John's aluminum intake manifold. In response to Phil's question Joe-JDC stated that the average flow for an ECZ-B intake manifold is 182-185 cfm; whereas, the Mummert intake manifold flows an average of 274 cfm. Has the ECZ-B intake manifold been flow-tested after opening the four holes to two ovals and blending the runners into the plenum? Results?

Phil, if you replaced your B intake with Mummert's without making any other changes (other than a larger carburetor), did you experience a "seat-of-the pants" increase in performance? If so, what was the effect below 3500 rpm?