When to rebuild/re-ring

[robert0762]

When I rebuilt my motor I ended up at 170 psi. Just wondering how much of a drop in compression before i rebuild or freshen up the top end. As long as cylinders and pistons have correct clearance i can just hone and re ring correct ?

[thomas h.]

Just depends but most bore at 100-110 psi

 

At lite hone and new rings well it's up to you my guess is about 150 psi but cause if your running race gas then keep it at race gas compression

 

A good question would be how big can the cylinder get be for you risk breaking a ring.

 

Well just give your machineinst the jugs to check when ever you order rings. At some point he will say its time to bore or the bore is scratched so bad it time to bore