Mon premier blog

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

Written by admin on September 3rd, 2010 The better the head flows the less suction it takes to fill (or nearly fill) the cylinder. This has brought about the curves shown in the graph Fig. 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". David Vizard's How to Port & Flow Test Cylinder Heads (SA Design) $18.79. BOOKS ON SALE TODAY April 15, 2013 | free delivery | NO minimum purchase. 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. Porting heads is an art and science. The latest in the Dart University Master Series is an editorial piece on port volumes and what one needs to know and why to maximize your cylinder head investment. Best selling David Vizard's How to Port & Flow Test Cylinder Heads free download. David Vizard's How to Port & Flow Test Cylinder Heads (SA Design). 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. User | Posts: 99 | Joined: 03/12. 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. David Vizard's How to Port & Flow Test Cylinder Heads, CarTech book. Have you read the Popular Hot Rodding "Cylinder Head Porting - Head Porting Basics" Feb 2009 article by David Vizard, or read his porting book? 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.