Thread: Rods hitting cam, Cam gear scrubs block..

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As you said you havee had the whole assembly balanced is there any way that you can go for a smaller base circle cam so that the rod misses the cam lobe. Because take to much off the rod and you will have an imbalance problem. To be double sure check with your machinist and work from there.

Yea thats what I figured, the machine shop guy stopped by and it turned out it was because it was a factory roller block, and I was using a flat tappet setup with a double roller timing chain and gears. He showed me where it needed to be grinded, which was a whole lot, so we opted to get a truck timing chain and gears instead. As far as the rods and cam problem, I have been hearing that 60 thousanths is the recomended clearance between them, Im barely hitting, and only in 2 cyclinders that I know of as of now. I guess we will see how tha goes, I thought about a small base circle cam, and to be honest I am a little unsure of how the exactly are designed. How much more clearance will I get? And will that mean I need a special pushrod? Thanks for all the input, this seems to be a really active forum, prolly the most active I've been on, very helpful, thankyou.