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David Vizard's How to Port & Flow Test Cylinder Heads David Vizard
Publisher: CarTech, Incorporated

This was the port flow tested, and the hole seemed not to affect the flow as the numbers delivered were strong. We'll show you how, but you'll need to leave those old myths at the door. Easy Steps To Building An Affordable Track-Day Terror. This article discusses porting for velocity and anti-reversion Annnnd, as somebody realized, this second edge has a bit of anti-reversion effect, that is, it tends to block the flow of any pressure waves that might be trying to come "UP-stream". Photography by David Vizard, Johnny Hunkins But having the greatest flowing heads counts for zero if the valves are not opened sufficiently or at the right time in relation to the crankshaft's rotation, and that very important function falls to the camshaft. From the March, 2008 issue of Muscle Mustangs & Fast Fords. Porting heads is an art and science. Stock-Block 535HP Screamer - D.S.S. David Vizard's How to Port & Flow Test Cylinder Heads (SA Design) Overview. David Vizard's How to Port & Flow Test Cylinder Heads (SA Design) $17.27. About the time this Ford head was in the development stage, AFR's founder, the late Ken Sperling, was heavy into swirl and wet flow testing. In the December 2001 issue of Muscle Mustangs & Fast Fords toward the back of the magazine is an article by David Vizard about porting a pair of Windsor Jr. From the February, 2009 issue of Popular Hot Rodding.