502 heads on 454 mpi?
#1
502 heads on 454 mpi?
A friend of mine has a pair of 502 rectangle port heads that i can get cheap. right now i have a 96 7.4 mpi with the 502 intake(for looks) any way i have the oval port heads and want to swap out to the rectangle port heads. what difference will i see? will i need my computer remaped for the increased rpm range? whats the good and bad?
jay
jay
#2
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A friend of mine has a pair of 502 rectangle port heads that i can get cheap. right now i have a 96 7.4 mpi with the 502 intake(for looks) any way i have the oval port heads and want to swap out to the rectangle port heads. what difference will i see? will i need my computer remaped for the increased rpm range? whats the good and bad?
jay
jay
I assume you have the 310 HP L29 Vortec engine. The 385 HP Mag already has rec port heads.
Last edited by jeffswav; 09-30-2009 at 07:34 PM.
#5
#6
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Is it a Gen 5 or 6 ? Gen 5 has small oval port heads with 118cc chambers. Gen 6 has vortec large oval port heads with 100cc chambers.
Last edited by jeffswav; 10-01-2009 at 07:11 PM.
#7
seems like you'll lose torque & hp through most of your RPM range atleast till 4500 w/ the rec port heads. I would port your Vortecs or stay w/ large ovals on a 454. The guy who ported & flowed my vortecs said they should support up to 550hp.
#8
thanks jay
#9
The same guy mentioned above put a mild cam (224/224 .500") in a stock low compression 454 w/ non ported peanut heads & it dynoed approximately 420hp / 530tq. I don’t remember if it was a roller or flat tappet, probably roller.
#10
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it has the small oval with the 118cc. so from my understanding because f my cam being small i really wont make power improvements? so can some one reccomend a valve train upgrade to match or should i just contact rmbuilder i have read alot about? im not looking to go over board, just want to beef up some power out of the mpi. can i use the 500hp efi cam?
thanks jay
thanks jay