Join Date: Mar 2002
Location: Austin, TX, USA
stingr has the right idea. I just prefer to work it the other way. Start heavy (or medium actually) and then progressivly lighten the springs until it starts to ping. Then back up a step by changing one spring to a heavier spring. The two springs don't have to be the same weight.
It's probably OK to start with the light springs first, provided your compression ratio isn't too high. I'm just afraid that my first test might be my last if the engine detonates.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI