Moly or Cast Rings?

[69-er]

I have an old SBC that is maxed out at 0.60” over. It has about 70,000 miles since it was rebuilt. Several thousand miles ago, I tore down the motor and did a quick hone and ran the motor with no apparent blow-by problems. (On cold mornings, it does sound like a diesel! Piston slap?) I can’t remember what type of rings I used.



For other reasons, I have torn down the motor again and I’m going to try to do a hone one more time. I have no idea what the actual taper is. There is very slight ridge I can feel, with the sides of the cylinders being a little less, so I know there is an out-of-round condition. I can still see a lot of the original cross hatch on the walls, but the pattern is irregular and somewhat patchy.



Since this is not the correct way to be resurfacing the cylinders, I was wondering what would be the best ring to use that could tolerate the irregular wear.


Thanks!

[Joe 1320]

I have an old SBC that is maxed out at 0.60” over. It has about 70,000 miles since it was rebuilt. Several thousand miles ago, I tore down the motor and did a quick hone and ran the motor with no apparent blow-by problems. (On cold mornings, it does sound like a diesel! Piston slap?) I can’t remember what type of rings I used.



For other reasons, I have torn down the motor again and I’m going to try to do a hone one more time. I have no idea what the actual taper is. There is very slight ridge I can feel, with the sides of the cylinders being a little less, so I know there is an out-of-round condition. I can still see a lot of the original cross hatch on the walls, but the pattern is irregular and somewhat patchy.



Since this is not the correct way to be resurfacing the cylinders, I was wondering what would be the best ring to use that could tolerate the irregular wear.


Thanks!

Yikes. I'm not sure I would bother. at .060 over you already know it's at it's end of life. The fact that you're seeing irregular wear on a .060 over block could mean the pistons are done, it could mean there is some core shift in the block, so many things. I'm probably not helping the situation, but I see nothing but problems on the horizon.

[Trash man]

go to the junkyard, get a virgin 350 block and bore to 30 over and use moly rings