Found my Cam Problem in the Big Block

[1970 CST Short Wide]

When I built my 454 I used a Comp Cam #11-207-3 this is a 270 duration cam with a 510 lift. It sounded like a solid lifter cam that was out of adjustment. I called Comp and told them my problem and they sold me another cam (same #) at cost and said to see if that fixed it. It DID NOT FIX IT, It still sounded nasty. After putting out $350 to have my lifter bores reconditioned and trying it again I Still had the same problem. I mean this thing was loud and nasty. A local machine shop said that they used that same cam and had the same problem in a few Big Blocks that they built. They said to use Comp Cam #11-242-3 a split duration 268 / 280 Cam with a 520 lift. The noise is gone and the performance is Sweeeet.

I called Comp and told them of my problem and that I wasn’t very happy after changing out the cam 3 times.

I'm waiting on there answer and will keep you all informed IF they call back