Hi everyone, I just put a new cam in and i have a question. Due to some unforseen circumstances with the old cam and lifters, i believe i may have weakened a couple if not all of my springs. I am noticing some bad harmonics, low manifold vacuum, and relatively low RPM float (as well as poor performance!). Here are the specs on my new cam: 222 in/ex .498 lift in/ex 110 lobe separation I have a set of valve springs laying around the house that i ordered from summit some time ago. They are the Edelbrock springs, single with a dampener (#5722). My question is, should i use these springs with my current cam? The springs are designed for the Edelbrock RPM cam. They list the seat pressure as 120lbs closed and 338lbs @ 1.200". The sheet that came with my cam says "spring requirements": 95lbs closed, 253lbs open. What do i stand to gain/lose by using these springs? Would i need anything else besides retainers and locks to use them (studs/guideplates)? Would you use them on YOUR car with that cam? Other than that...if you guys don't think i should use them...anyone know what summit's return policy is? Thanks!
cam sounds like you wiped some cam lobes. Take the valve covers off, pull all the plugs, and you can hand crank the engine over and measure each valves complete movement. Only takes one lobe.
Thanks for the response, rickyracer! That was my concern with the OLD cam, which is exactly why i put in a new cam! This cam has less than 1,000 miles on it and the car runs much better than it did before with all the tappets seized (they seized because i had the heads milled and the studs are the unadjustable posi-stop type). Anyways, i got the comp cams kit to make the valves fully adjustable and put the new cam/lifters in, and it runs well but i'm still getting low vacuum and relatively low rpm float (about 4k and it feels like it floats). Just wondering if the springs i have would be a good matchup for my cam.
