By David Vizard
Writer Vizard covers mixing the bowls, easy porting techniques, in addition to pocket porting, porting the consumption runners, and lots of complicated tactics. complex systems comprise unshrouding valves and constructing the precise port region and perspective.
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Extra info for David Vizard's How to Port & Flow Test Cylinder Heads
Four different times he has entered a race series with vehicles he was unfamiliar with at the start of the season. In each case by less than halfway through the season his car was not just competitive but truly dominant. As an inventor David has been responsible for numerous patents. At last count this was about 40 but the number of his patentable designs is probably five times that. Patents range from fuels to F1 cylinder heads. But some of his work is not really patentable. An example here was the Ford Anglia ground-effect “Tunnel” car he built in 1971.
But I was concerned by the third and most important thing I learned or, more accurately, realized. If I were going to learn anything significant about engineering big horsepower numbers from engines, I was going to have to do a substantial amount of original research. Sure, there are plenty of books on the general design of internal combustion engines. Heck—I have most of them in my library. But back then, trying to find an engineering book that focused on the real nitty-gritty of boosting engine power left you with a very short list of books to choose from.
Although going this route may make the comparison of results fast and convenient, it can also, as we shall see, compromise port development. Fig. 2. These curves show how the airflow varies with test pressure. To make viable comparisons, we need to test at or near the same test pressures. Although corrections can be made, the bigger the correction, the greater the possible error produced. Until the 1990s, when the International Automobile Federation (FIA) let the reigns go on naturally aspirated F1 engine development, it seemed the heyday of rapid piston engine development was during World War II.