Originally Posted by HotRodDave
Originally Posted by polyspheric
Far too many cam explanations leave out 2 factors (1 big, one small):
1. combustion chamber design (shape, volume, stem angle); wedge cam and hemi cam = chalk & cheese
2. rod ratio


If a hemi and wedge somehow ended up with identical flow numbers (hypothetically obviously), compression, displacement... how would you change cam specs based on the chamber and valve arrangement?

What change would you do to a cam if everything was identical but one had much shorter rod stroke ratio?

Go ask on speed-talk.com. There are a few very knowledgeable cam grinders, engine builders, and class racers who regularly get into cam debates.
I wish Harold was still around. He was the man. I think Vizard may have addressed some of this in his books.

In theory, there is no difference between theory and practice. In practice, there is.