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

David Vizard's How to Port & Flow Test Cylinder Heads (SA Design) $18.79. All the modifications in the tests shown were performed by the author of this article, and cylinder head flow expert David Vizard, at Vizard's flow research facility. David Vizard's How to Port & Flow Test Cylinder Heads by David Vizard. David Vizard's How to Port & Flow Test Cylinder Heads. Cylinder head porting is not for everyone. David.Vizard.s.How.to.Port.Flow.Test.Cylinder.Heads.pdf. Download David Vizard's How to Port & Flow Test Cylinder Heads. For a highly developed two-valve race engine the pressure difference between From this premise it has been possible to develop a simple correlation between exhaust port-flow bench tests and dyno tests involving pipe diameter changes. 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". In order to understand the impact of intake port volume on performance, the folks at Dart Machinery tracked down engine guru, David Vizard, and asked him to write up the results of his testing on the topic. Exhaust System Science -by David Vizard. 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. Porting demands the right tools, skills, and application of knowledge. It takes a craftsman's touch to shape the surfaces of the head for the optimal flow characteristics and the best performance. Written by admin on September 3rd, 2010 The better the head flows the less suction it takes to fill (or nearly fill) the cylinder. IOf you Using Dart Platimun Pro cylinder heads with four different intake port volumes ranging from 180 to 230 cc, he compared the flow rates achieved at different valve lifts and found vurtually no difference amoing the four, until lift passed the 0.400-inch mark. This has brought about the curves shown in the graph Fig. David Vizard's How to Port & Flow Test Cylinder Heads (SA Design) $17.27. Porting heads is an art and science. It takes a craftsman's touch to shape the surfaces of the head for the optimal flow characteristics, and hence, the best performance.