[TAQuest]

Originally Posted by Formulajones

Here's a quick calculator to get in the ball park. Of course we need to know specifics about your engine like exact compression ratio for example, for these to be accurate.

http://www.wallaceracing.com/dynamic-cr.php

I believe Steve posted up similar calculators that work.

Another cam that would do the same thing with a little more lift would be the 2801 from Summit. It's a RAIII type cam that should idle nice and smooth in a 400.

I ran both the 2157 and the 068 on the calculator and I don't see a difference in compression.