Thread: Need our engine experts to help me out.

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Those are good ideas about getting bigger pistons and using this block if need be. Last night Don, Dan, and I worked on Dons T bucket, changing his front end around, and I got another look at the walls of my block. It really isn't as bad as I thought, now that I have calmed down a little. The scuffing is very minor in the 6 and 12 positions. More and more I am leaning toward one of two things making the noise:
1) That fuel pump eccentric looks a little out of round to me, and loose.

2) I made a modification to the harmonic balancer that may have let it be slightly loose on the crank. I went to a Ford Racing short water pump assembly that picks up 1.5 inches of room in the front of the engine, however, Ford Racing has discontinued some of the parts needed to complete the swap. I was able to find a new timing cover and water pump, but the V belt pulleys are now almost impossible to find. So, I bought a set of Zoops billet aluminum pulleys, but because I am using a Ford Racing harmonic balancer the crank pulley sits back 3/16 of an inch too far to line up with the water pump pulley.

I bought a 3/16 spacer from Zoops, but it didn't register correctly on the balancer, and the pulley wobbled. I came up with the idea that if we could space the balancer 3/16 out from where it was it would line up. Dan and I cut 3/16 off of the end of another balancer and ground it totally concentric. I slipped this in first, then put the balancer on. The pulleys now lined up, but I am wondering if moving the balancer out 3/16 upset something.

The keyway on the crank looks very slightly rounded on the front and I see two marks on the opposite side of the snout from the keyway that looks like something was wobbling around. I am going to put the balancer back as designed and have Zoops machine me a proper spacer that registers on this balancer, to eliminate that problem. I don't know if this might have been causing any problem, but I didn't care for the jury rigged setup I had.

Here are a few pictures of some of the cylinders. If you look closely you can see the scuffing at the 6 oclock positon.

Thanks guys for the ideas.

Don