Thread: Procomp aluminum heads/ kmj performance heads

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Originally Posted by 70chevybb

Easy on me guys, remember I am building this for a daily driver. I am still having a hard time on cam selection. I do think I will be ging with flat tappet. I really like the comp cam mahgnum292. I only say that as in the mid 80's I had a chevelle with a 396 and the same cam. It was a daily driver year around and by far the best running bb I ever had.

With the reduced quality of oil available today I would not consider a flat tappet cam, even for a daily driver. You can wipe a lobe too easy, and once it starts wearing it will grind the lobe to nothing in a few thousand miles, and the engine will be eating the abraded cam lobe metal to take out the rings & bearings with it. Sure you can run zinc additives, but why risk it?

Originally Posted by rspears

With the reduced quality of oil available today I would not consider a flat tappet cam, even for a daily driver. You can wipe a lobe too easy, and once it starts wearing it will grind the lobe to nothing in a few thousand miles, and the engine will be eating the abraded cam lobe metal to take out the rings & bearings with it. Sure you can run zinc additives, but why risk it?

times two and the roller cams offer so much better profiles