First Generation Firebird-L Mailing List .........................................................................
Hi pete, thanks for the advice.? I will check the hidden plug issue> we installed a high flow pump in yyesterday.? But nothing changed.? We had three lifters that were bad > the manufurers are saying that the quality is down. steve -----Original Message----- From: Pete D <[email protected]> To: [email protected] Sent: Sat, Sep 19, 2009 4:52 pm 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/>
