Ring Gap

[YLD-CHLD]

Has anyone else who has used Arias pistons found the ring gap on the supplied rings to be excessive .038".

I contacted Rocket & exchanged the rings for another set but they aren't much better at .028".

I am now searching for a top & second ring that require a file fit & that will match the Arias pistons.

Any help would be appreciated.

[R32-GTS]

Use a nissan n1 top ring and a standard nissan second ring. Thats what i had to do.

[proengines]

What's the bore size like? every extra .001" bore diameter will give an extra ~.003" ring gap (using Pi*D).

Most finished ring sets are made to give at least the minimum gap at the exact bore diameter they're made to suit for easy fitting by anyone. I know the Wiseco rings we use still require gapping even with .001" extra bore dia. They might be worth a try but off the top of my head the Arias pistons use a 1.5/1.5/3.0 ring set and the Wisecos use a 1.2mm top ring and maybe a 2.8mm oil ring. You could always go for a set of compression rings .010" bigger oversize, say .040" if the bore is .030" and file them to suit, they should have almost no gap to start with so you can set what you want.

ACL might do file backs in the standard ring widths, otherwise try Colin at Special Piston Service in Melbourne, he might have something there.

[YLD-CHLD]

What's the bore size like? every extra .001" bore diameter will give an extra ~.003" ring gap (using Pi*D).

Most finished ring sets are made to give at least the minimum gap at the exact bore diameter they're made to suit for easy fitting by anyone. I know the Wiseco rings we use still require gapping even with .001" extra bore dia. They might be worth a try but off the top of my head the Arias pistons use a 1.5/1.5/3.0 ring set and the Wisecos use a 1.2mm top ring and maybe a 2.8mm oil ring. You could always go for a set of compression rings .010" bigger oversize, say .040" if the bore is .030" and file them to suit, they should have almost no gap to start with so you can set what you want.

ACL might do file backs in the standard ring widths, otherwise try Colin at Special Piston Service in Melbourne, he might have something there.

Thanks i will be trying Rocket tomorrow for a set of file backs.

Bore size is 3.899 approx. .004" clearance ,what Arias recommend.

Thanks again if i don't do any good i will try acl & SPS.