Big Valves and porting?

[Jim Brierley]

Originally Posted by GeneBob

Jim,
Is there a guide or YouTube video or something to show where and how much porting is done? I have wanted to do some porting but don't know how.
Thanks,
Gene

Gene, Not that I know of, but basically you just need to smooth the castings and enlarge them slightly, especially near the valves. Use of a high RPM die grinder is the best tool for this. Some use of JB Weld or similar to direct the air flow can help. IMO bigger valves are not worth the expense and trouble unless you want to race.

You might want a copy of my '4-bangers and me' book. e-mail me at [email protected] for info on it.