Thread: comp cam noise

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I have a Comp Cam XE roller in my 383. It sounds like I have a solid cam. Called Comp , they sent me another set of lifters. Noise was the same. Replaced them with GM lifters. Noise is the same. If I wanted the sound of a solid cam I would have bought a solid lift cam. I'm replacing it with a LT hot cam or a Voodoo 60121.

As I've posted previously, in my 331 sbf, I'm running a Ford Racing X303 cam, Ford Racing roller rockers, and Harlan Sharp roller rockers. It is the noisiest motor I've ever owned or heard.........ticks like mad. When I tear it down I am going to do some serious research to find out whats what. Strange to hear you other guys are having noise issues and questions too.

Don

It's the xe (Xtreme Energy) part of the cam that's producing the problem. The ramps on those grinds are just this side of letting the edge of the lifter dig into the lobe. Change to a Magnum grind and the rattle should go away.

You can tell whether a cam is ground on the extreme pattern or not by subtracting the 0.050" duration from the advertised (0.006") duration. Anything 50 degrees or more (280/230 for instance) should be ok. Crane, I remember, used to grind all their cams with a 56 degrees difference.

The XE256H is 212/256 on the intake, a difference of only 44 degrees.