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Old Feb 22, 2008 | 01:45 PM
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HawaiianZ28Rider's Avatar
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Default ls1 to ls6?

quick question guys

i have a 1998 z28, if i were to get a hold of some ls6 heads along with a ls6 came, would i have 400 horsepower? would i bassically have a ls6/zo6 engine if i did that?
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Old Feb 22, 2008 | 01:54 PM
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i apologize if this question was asked a million times

again if i swapped my 241 heads with some 243's and a ls1 cam to a ls6, would i achieve 400 hp
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Old Feb 22, 2008 | 02:24 PM
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I dont see that happenning. I have the same thing as you do. I have put on LT headers, LS6 intake, Did some exhuast work and am ready to do a spring and cam swap, and with that I doubt I will be over 400.

Someone can correct me but I believe the LS6 intake is good for 12-18 hp, LT headers are good for 10-15 at best

Heads are a good start but may only net you 25 if nothing else is done. Now a cam, intake, head swap, and headers will get you there or darn close.
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Old Feb 22, 2008 | 04:31 PM
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I think it's plausable. Fly wheel yes, rear wheels no.
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Old Feb 22, 2008 | 04:33 PM
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RedZ_02 is right on, fly wheel I believe so.
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Old Feb 22, 2008 | 05:05 PM
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With your car being a 98 you will also need a ls6 intake manifold. If you do this swap be sure to buy the 02+ ls6 cam. The 01 ls6 motor was rated a 385. The 02 used a larger cam. But yes if you get a ls6 intake, heads, cam you will have 405.
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Old Feb 22, 2008 | 05:17 PM
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Originally Posted by WhosNXT
With your car being a 98 you will also need a ls6 intake manifold. If you do this swap be sure to buy the 02+ ls6 cam. The 01 ls6 motor was rated a 385. The 02 used a larger cam. But yes if you get a ls6 intake, heads, cam you will have 405.
at the crank...
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Old Feb 22, 2008 | 05:21 PM
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Originally Posted by aaron653
at the crank...
Thats what I was saying. Thats why I did not put 405rwhp
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Old Feb 23, 2008 | 10:31 AM
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I thought the ls6 had higher compression as well. Wouldnt that prevent him from hitting 405hp?
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Old Feb 23, 2008 | 11:38 AM
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The LS6's increased compression ratio comes from the 243 heads having a smaller combustion chamber. 64 cc versus 67cc for the LS1
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