Originally Posted By: snowman4839
Well the set I ordered has 5/64" first and second compression rings and 3/16" oil rings. Is that not the stock ring size?

I'll be sure to talk to him when I decide to order.


I can't remember off hand but,, IIRC, there are two sizes that came on 250 pistons.

I had ordered a set of rings when I was 16 years old & they were too thick. It said they were for a 250 engine, but I think they were a truck 250 engine? (Never looked futher into it)

Get this,,,, being young & foolish, I used my piston ring groove cleaner tool & actually machined the grooves wider so the rings fit on the pistons. DO NOT DO THIS!

I put the engine back together & it had so much blow by it was ridiculous.Probably installed the oil control rings in wrong. \:D Live & learn.
The engine ran fine believe it or not, but it just had massive blow by.
People driving in there cars & would be @ a stop light would say to me, hey, your engine is smoking.
MBHD

12 port SDS EFI