How to Port & Flow Test Cylinder Heads (S-A Design)

Vizard is legendary for being able to put complex technical topics down clearly on paper in an understandable way and this book is no exception. Many technical writers merely state things based on their training and experience. And those statements may be 100 percent accurate. Vizard takes the extra steps to show you the proof that comes from his objective testing. If you are a geek like me, you will devour every word of this book like it was your first meal after a three day fast. I wished for a little "more" on the topic but know there is a level past which this can't be taught without hands-on experience. Consider this book a primer for someone in preparation for gaining some specific experience. There is no "one size fit's all" when it comes to porting so it really can't be taught generically. I'm sure Vizard could have taught how to port a particular head and given us one of his secret recipes for that head but that recipe wouldn't translate to another head. The bottom line here is that if you expect this book, or any other, to show you how to port any head for fun, profit and mondo horsepower with no more than a die grinder, you will be disappointed. While you can successfully make minor improvements that are beneficial, you can't get into the "Big Leagues" without a flow bench, a small array of precision tools and a few extra heads to experiment on.

Have a bunch of Davids books, and have ported SB chevy heads using his methods with good results.

Some say too technical. Not so for me. I like knowing why when learning a new skill. Keeps me from undervaluing the practical applications of the skill. Well worth the read. If you get it I would start with chapter 7 and read the 5 golden rules then start at the beginning. Now you’ll be ready to take notes.

Not very informative

If you are curious about doing your own performance head porting, this is where you start. Great information!

This has increased my understanding of the internal combustion process greatly. I recommend it especially if you are thinking a a camshaft upgrade.

The author is a master of his craft, and this publication a far reach into the mind of a man exceptional at his craft.

Dv is such a resource it gave me a great perspective on the area of the heads to work on and how to allocate my time resources to maximize my gains a must read