Quote:

John,

Just curious what was open load pressure on the springs used ?

logan426

I have been also looking at the ratings, the Edelbrock performer heads I'm using deliver 120-pounds seat load at the as-delivered installed height of 1.880 inches, and are able to handle up to .600-inch lift.

I'm using a 564 lift cam, so I'm within what it can handle, but wondering if stiffer springs would reduce noise or possibly increase it?
RJ