Thread: CR question?

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Originally Posted by JBoss

OK. I need more enlightenment. Please explain "Dynamic CR"

I will be using a comp cam. 270H

Go back to the calculator:
http://www.kb-silvolite.com/calc.php?action=comp
Enter all of your information and then plug in your rod length (5.7 inches) and the intake closing angle for the cam (61 degrees) and this will give you your dynamic compression ratio. It is much more accurate than static compression ratio in determining whether your engine will run on pump gas. As a general rule of thumb, iron headed engines should be 8.0 or less while aluminum headed engines should be 8.5 or less. If you want to read up no DCR, check out this thread:
http://www.chevytalk.org/fusionbb/sh...php?tid/92966/