First Generation Firebird-L Mailing List ......................................................................... Sheen, You're making extra work for yourself. Cam break-in takes 15 minutes, which does not have to be continuous. I normally run 1500 -2000 rpm (no idling!) about 5 minutes, shut down and let it cool then repeat 2x. Or you can just go drive 15 to20 minutes as long as there is no significant idling. My preference is to do the cam break-in stationary so that I can check for leaks, optimize timing, etc prior to the road test. There is no need to change headers. The exhaust gas temperatures during break-in shouldn't be significantly higher than normal street driving unless you have a lean mixture issue or your timing is way off.
I let it cool because the car is stationary and has less airflow across the radiator & I don't want excessive coolant temperature. Also there may be small air pockets in the system since the block was just filled with coolant. If you're concerned about the header coating, you could break-in the cam two minutes at a time. As long as you get it started quickly, keep the rpm's correct, and get a total of about 15 minutes, the cam break-in should go fine. The headers are going to get hot sooner or later - it's not uncommon for headers (or manifolds) to glow red at night in normal service. Good luck on the start up! It's always fun to hear one fire off for the first time after putting it all back together. David ----- Original Message ---- From: S Sterchi <[EMAIL PROTECTED]> To: First Generation Firebird-L <[email protected]> Sent: Thursday, October 16, 2008 9:41:45 PM Subject: RE: [FGF] Exhaust manifolds for '69 RA III 400 First Generation Firebird-L Mailing List ......................................................................... Dan, Please let me know if you are wiling to give up your rusty old headers. I need a "sacrificial" set to break in my motor. During the intial cam break in, the motor produces a LOT of heat and it can easily ruin the finish on my new ceramic coated headers. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------------------------------------------------------ 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>
