i was gapping my rings and i notice that the oil rings was all diffrent in specs,
between .022 inch to .030 inch its was all diffrent in each cly, is this in spec??

 

any body knows the specs?

 

Are they aftermarket Piston or stock. How bigs the bore
Cheap fix or brand new ? off the bat they sound a bit big
Rule of thumb for any petrol engine is 0.003" to every inch of bore.
85mm/25.4= 3.346"
3.346"*0.003"= 0.010"ish

Your limit being 1mm/0.040" says your within in spec's( I don't like the sound of a 1mm gap but think about what its doing and you could get over it , I guess)
All this is if your running stock pistons if aftermarket check the sheet with your piston etc.

Straight out of the book: if your running stock pistons and rings with standard boost
Standard value:
No. 1 ring 0.25 – 0.35 mm / 0.010" to 0.013"
No. 2 ring 0.40 – 0.55 mm / 0.0155" to 0.21"
Oil ring 0.10 – 0.40 mm
Limit:
No. 1, No. 2 ring 0.8 mm
Oil ring 1.0 mm
If you are running aftermarket pistons boost and application comes into play, 850hp+ I personally go about 0.017-19" top, a little bigger or tighter (depending) 2nd and neutral for O-ring

 

.020 over pistons , i have

 

those are way too big. i run a .017 on my top and .019 on my mid ring. This is on a 1000hp motor so its built pretty loose. if this is more of a DD car with less than 500hp i'd shoot for a .016 top and a .018 on the the mid ring.

 

am talking about the oil rings not the compression top rings