dynamic compression ratio of stock cam?

[acannell]

say swirl head, 2.5, stock turbo roller cam?

[Warren Stramer]

Give me the mechanical compression ratio, measured duration @.50, installed centerline, and cam LSA and I can calculate it precisely for you.

[acannell]

Give me the mechanical compression ratio, measured duration @.50, installed centerline, and cam LSA and I can calculate it precisely for you.

yay!

i shall get back to you when I have that data

[Vigo]

If you plan to do some comparisons on different setups you can take the schrader valve out of a compression gauge and then do running compression tests at X rpm and X manifold pressure on the engine you plan to modify. There might be some limitations to this such as if your engine cant make full 'normal' boost with only 3 running cylinders. Don't forget to disable the injector.

[Force Fed Mopar]

Here's a calculator for it

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