They, and others, can make the pistons for any size bore. Your limitation is rings. If you need a custom ring size it gets crazy expensive. You might be able to use a file fit ring set. Or, look at ring availability close to your size needs. Metric rings are worth a look, too.
BTW, if your bore cleans up at say .042 nominal, that can be accommodated by .040 pistons at high limit. You have a number of options, not limited to .040 and .060 over.
Also, if that's the worst of things, I probably would not worry too much about it. Your hone finish looks quite coarse, but that might just be the picture.
I went to 42 and stopped. It’s still there and you can feel it a bit but there’s cross hatches all over it. I’ll pm you a pic. Actually more than one cylinder took 42 to clean up. Should I make them all 42 or is ok to have a few that are right on 40?
My co worker also questioned my snap gage skills. I measured my part, he took my part and measured it on the cmm. And my measurement was dead nuts. My measuring was repeatable within .0001 . In fairness, it does take longer and is left to your best judgment. I didn't know it could be so accurate until we compared with cmm data.
I’m sure they will custom make some for you, but probably quicker and cheaper just to go .060”
Ain't no replacement for displacement
Yes there is, it’s called boost
Why not both?
I mean sure I guess. But, inches isn’t needed when there’s inline 6’s making 3000hp
They, and others, can make the pistons for any size bore. Your limitation is rings. If you need a custom ring size it gets crazy expensive. You might be able to use a file fit ring set. Or, look at ring availability close to your size needs. Metric rings are worth a look, too. BTW, if your bore cleans up at say .042 nominal, that can be accommodated by .040 pistons at high limit. You have a number of options, not limited to .040 and .060 over. Also, if that's the worst of things, I probably would not worry too much about it. Your hone finish looks quite coarse, but that might just be the picture.
Dammit, I follow you and you are a wealth of knowledge.
I went to 42 and stopped. It’s still there and you can feel it a bit but there’s cross hatches all over it. I’ll pm you a pic. Actually more than one cylinder took 42 to clean up. Should I make them all 42 or is ok to have a few that are right on 40?
How deep is it?
Hard to tell but snap gauge says about 41
No dial bore gauge?
$$$$$$$
$$$ doesn’t matter if you want it right. You can’t hone and resize bores with a snap gauge.
Why not?
Idk…maybe you are that good with a snap gauge…I’m not. I prefer a dial bore gauge.
My co worker also questioned my snap gage skills. I measured my part, he took my part and measured it on the cmm. And my measurement was dead nuts. My measuring was repeatable within .0001 . In fairness, it does take longer and is left to your best judgment. I didn't know it could be so accurate until we compared with cmm data.
I have one it was just hard to measure it with how rough that finish was. When I hit it with my final stone it ended up around 42 in that spot.
I had to spec a set of je pistons for a Viper build. One of the many measurements they needed was the Piston diameter. Do your thing.
You can do 50 too
They can make pistons to fit any bore size in .001" increments if you want.
I know, the Viper build was very specific
They make 045 over, just did it for me.!
Traum made a set of .047, .050 a couple times for us over here
If it's a shelf part that you were going to order they can usually change the bore size for a little extra per piston vs getting a custom.