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ls1 vs. ls6 heads

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Old Sep 19, 2005 | 06:59 PM
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Default ls1 vs. ls6 heads

I have a set of 99 5.7 LS1 heads that were ported by Absolute Speed (stage 2)....They made 407 hp/395tq with a thunder 224 cam/kooks . My Question is Im gonna be getting a 01 LS6 motor from a low milage vette in the next week or 2. What would be the HP/TQ difference if I put the 224 cam in the Stock head LS6 motor????

I'm hoping I can just slide the cam in the motor and install some valve springs and go....Or should I stick the AS heads on the LS6 block????
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Old Sep 19, 2005 | 08:36 PM
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i would say look to see some less power if you use the ls6 heads but you can always port them
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Old Sep 19, 2005 | 09:35 PM
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Ported LS1 heads will flow WAY better than stock LS6 heads.

Ported LS6 heads could make 10-15hp more than the ported LS1 heads.

If I were you, I'd throw the LS1 ported heads on the LS6 block, and sell the LS6 heads.
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Old Sep 19, 2005 | 10:27 PM
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i knew a guy that had GTP stage 2 heads i belive. never dynoed good. he swapped out for some stock LS6 heads and gained 10 rwhp.
Just cause they are ported doesn't mean it a good port job.
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Old Sep 20, 2005 | 01:11 AM
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If, I were you, I would sell the LS1 heads and have the LS6 heads ported.
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Old Sep 20, 2005 | 05:37 AM
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Originally Posted by SUX2BU
i knew a guy that had GTP stage 2 heads i belive. never dynoed good. he swapped out for some stock LS6 heads and gained 10 rwhp.
Just cause they are ported doesn't mean it a good port job.

Same heads, my car dynos fine.
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Old Sep 20, 2005 | 07:22 AM
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Keep the LS1 heads. The 2001 Vette heads didn't have any of the advantages of the 2002 heads, i.e., lightweight valves, etc. I would re-use your current heads.
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