Join Date: Jan 2002
Location: Calgary, Canada
Terracan,- Kinda depends on if it is a street motor or a race type application. File fit rings are great, but it takes a few hours to properly gap them, and unless you have done a lot of file fit rings, it can be sometimes very difficult to get the gaps parallel and consistent.
Since most ring companys are recomending approx. .0045 gap per inch of bore on the 1st, and .0055 on the 2 ring, unless the motor is extremly loose the std gap rings will suffice.
Based on a 4.310 bore thats .019 on the 1st ring, and .023 on the 2nd groove. Street type applications probably require more gap, CHECK with the ring companies for their recomendation. Also The ring companies have found that opening up the 2nd gap has picked up power on the dyno. Nitrous applications call for more gap.
Hope this helps.
2002 Jerry Bickle Cavalier, 446" Small Block, Brodix Canted Valve, lenco 5 speed, 7.54 @ 180. mph,1.06 60', 2235 lbs for 2014. GM Canada Docs, Highly Optioned 69 RSZ28 , Hugger Orange, White Stripes, 42,000 mile survivor, owned since 1973.