[Formulajones]

Originally Posted by Stan Weiss

While the stock head rules do not allow you to do very much. They do allow any valve job. Exactly what that means and how far that can be pushed I don't know. The question is which casting after a "creative valve job" flows the best?


Stan

That's exactly what I was talking about earlier, and gave an example of how Paul used different valves and valve angles to pick up 30 cfm on the 7F6 heads he did for an engine I built without touching the ports or bowls at all.

I did something similar with the 12 heads on my 400 for PS racing. No porting allowed, but that doesn't mean you can't change the valves and play with valve job angles.