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!

 

The cheap cast rings would be the way to go now. Might not last forever like the moly rings but with the used bore cast is about your only choice.