ok I think I know what my prob is but I don't want to admit it. my car did lose a bit of power over the last week of driving. I have only put about 50 miles or so on the motor. I went to readjust my valves and the number 2 cylender exhaust is not moveing as much as the others. Did I wipe out my cam or could I be wrong? I did readjust it but there is still no change in how much the rocker is moving.

 

wiped lobe or a foobared lifter (if your running hydraulics)

 

yes they are hydrolics. they are new. I figured I would put in new lifters but I reused the old cam. I knew better too.

 

Flat tappets or roller?

 

Flat tappets. I am sure that I had wiped the cam. another cylender on the intakde is also doing it but not as bad. enough for me to see it with my eyes.

so how much lift can stock heads take? I was wondering if .480/.502 would be too much for stock heads. and if I should upgrade the stock heads would it be just upgrading to better springs and having the heads gone through? thanks