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Which Heads - PRC LS6 or 5.3L?

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Old 09-26-2009, 10:48 PM
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Default Which Heads - PRC LS6 or 5.3L?

2001 camaro SS, LS1 motor, 6 speed, LS6 intake, 228 cam .585 lift 112 lsa, LT headers, ORY-pipe. Maybe getting a FAST 92/92.

Which heads will give Me the most RWHP gain, PRC (LS6 or 5.3L) stage 2.5 ported Heads?

Thanks
Old 09-26-2009, 10:52 PM
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I ran the prc 5.3 heads on my truck and liked them but IMO I'd do the ls6 heads
Old 09-26-2009, 11:00 PM
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The LS6 heads should flow just a little bit more. A few cfm's different is all.
Old 09-27-2009, 08:21 AM
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If done properly, at correct chamber size (all being equal), the 243s will win.
Old 10-01-2009, 06:00 PM
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I was under the impression that the boost in compression would create more power (as long as they flowed the same). I vote for the 5.3s, it is a proven setup on the forum.
Old 10-01-2009, 06:51 PM
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damn I wanna know the same thing.
I'll be running the ms3?
Old 10-01-2009, 07:37 PM
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You could mill the LS6 heads some if you want more compression.
Old 10-02-2009, 04:33 AM
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Originally Posted by TURBO6.0L
You could mill the LS6 heads some if you want more compression.
true, but doesn't milling hurt actual airflow, possibly countering the slightly higher cfm readings of the ls6 heads?
Old 10-02-2009, 09:07 AM
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not if you mill .030 or less, above that you start registering a slight decrease.
Old 10-02-2009, 09:22 AM
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Like stated, the LS6 heads will make more and better power than the 5.3L heads when setup properly. The 5.3L heads are very popular, due to their price however! We can mill the LS6 heads a bit to bump your compression up, without sacrificing your piston to valve clearance on a stock short-block for no extra charge when you purchase them new!
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Old 10-02-2009, 11:06 AM
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Ah ha! Put me in my place good. Well it's always great to learn something new.
Old 10-02-2009, 11:16 AM
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The LS6's offer better flow, even after porting, than the 5.3L heads.
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Old 10-02-2009, 11:20 AM
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Don't forget the PRC 215 heads as well! If you use your spring kit you'll get a aftermarket casting head with smaller runners, your choice of chamber size, better p/v, etc for under $2000!!!

http://www.texas-speed.com/shop/item...d=993&catid=20
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