First Generation Firebird-L Mailing List ......................................................................... I recently hade my 400 stroked to 467 by a reputable builder. It put out 410 horses on the dyno. The compression is 8.5:1. The builder installed a high-pressure oil pump. The engine runs at 220-230 degrees with a reconditioned 4-core brass radiator. At start-up my oil temperature is 80. At 220-230 my oil pressure is 12-15. Cause for alarm? The valve train is fairly quiet. Thanks! Bo
> From: Pete D <[email protected]> > Reply-To: First Generation Firebird-L <[email protected]> > Date: Sat, 19 Sep 2009 13:52:26 -0700 (PDT) > To: First Generation Firebird-L <[email protected]> > Subject: RE: [FGF] engine problems need advise > > First Generation Firebird-L Mailing List > ......................................................................... > What are the bearing clearances set to? Some builders will set the clearance > to the high side to get a little more power. This is not advisable for a > street engine because of the issue with oil pressure. Low pressure = a noisy > valvetrain, ask me how I know. > > re: oil pump; if you're not running a standard pump then a high-volume pump is > a better choice vs. a high-pressure. If I recall a hi-press pump can have an > adverse affect on the bearings. > > Another possibility for low pressure is a faulty lifter(s). One or 2 bad > lifters can drop pressure as much as 10psi, [again ask me how I know]. > > PeteJD > [69 400] > > > > ------------------------------------------------------------------------ > 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/> > > ------------------------------------------------------------------------ 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/>
