602 valve springs

[zlssefi]

What is the advantage to having a stiffer valve spring in a 602 crate?

[Egoracing]

Turn more RPM before you loose valve control.

[zlssefi]

Any idea what rate guys are using for that.? i know a stock spring is supposed to have an 80 lb seat pressure.

[Egoracing]

I've never seen a crate motor rule that allowed anything other than stock springs.