First Generation Firebird-L Mailing List .........................................................................
I file fitted them all last night and this morning. Basically the top rings were close, around .015. The Speed Pro spec is .004/inch of bore or .0166 (loose 16, tight 17 on the feeler guage). The second rings were around .011, dangerously tight. The spec is .005/inch of bore or .0208 (loose 20, tight 21). It's interesting to note that the 2nd rings are tighter when they are suppose to have more clearance. This is a mfg defect, mispacking, or some other problem. FM specifically said you should not file fit these rings. I confirmed with FM that the Speed Pro specs should be used with Sealed Power rings as well. The manual specs, .020 +/- .010, should not be used based on everyone I talked with (BP, my machinest, FM). Curiously enough, the rotating torque dropped to about 40 ft-lb. This is still a bit tight and there is a jerkiness to it with #7/8 at BDC. I've put way too much time into this, both research and rechecking clearnances. It's time to call it good and move on. I would not buy these rings again with the reversed specs on top and 2nd ring and the overly tight oil ring. Sheen> When it comes to sizing/fit it doesn't really matter who makes the rings. The rings [compression & oil] always have to be checked for correct fit.> > The same goes for the oil pump; I always disassemble the pump and check the clearances and fit of the pick-up. It goes w/o saying, the pump is too critical to assume anything.> > PeteJD> [69 400/400] _________________________________________________________________ News, entertainment and everything you care about at Live.com. Get it now! http://www.live.com/getstarted.aspx ------------------------------------------------------------------------ Submissions to Firebird-L: <[email protected]> Unsubscribe from Firebird-L: <[EMAIL PROTECTED]> Help: <http://FirstGenFirebird.org/firebird/Firebird-L.html> Classifieds: <http://FirstGenFirebird.org/ubb/> Owner Pictures: <http://FirstGenFirebird.org/show/> Donations: <http://FirstGenFirebird.org/store/cart.mv?999999> FGF Merchandise: <http://FirstGenFirebird.org/store>
