LS2 stock manifolds vs LS1
08-03-2005, 12:08 AM
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LS2 exhaust manifolds vs LS1 Has anyone done any testing yet on the LS2 stock exhaust manifolds?
Since I'm moving to California, I can't (legally) run LTs. Just curious how the LS2 manifolds compare to the older ones. Got a feeling they are all going to choke my 402ci LS2 a bit, but would still like to see some numbers if anyone has tried them.
Since I'm moving to California, I can't (legally) run LTs. Just curious how the LS2 manifolds compare to the older ones. Got a feeling they are all going to choke my 402ci LS2 a bit, but would still like to see some numbers if anyone has tried them.
Last edited by 89FormulaLS2; 08-06-2005 at 10:44 AM.
08-03-2005, 02:59 PM
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hi: Hot Rod did a test on an LS2 crate motor and they put on Z06 manifolds from a 2001 + motor and they gained like 5 more HP also they gained like 8-9 HP buy running a ls6 manifold and smaller trottle body. This was on an engine dyno not a chassis one. the Z06 manifolds seem to flow the best of the stock ones. The GTO manifolds are a tri-y design like the Z06 ones so they should flow pretty good. The outlet is only 2 1/4 inch on them from what I heard. Maybe you could open them up a bit to 2 1/2 or 3 inch. Good luck
08-04-2005, 11:36 AM
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I have a set of GTO manifolds and LS2 manifolds, and while I don't have flow numbers, the LS2s are much bigger and lighter. I measure the opening on the GTO manifolds at 2.0" and the LS2s at a full 2.5"
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08-06-2005, 10:43 AM
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Originally Posted by StickSS
hi: Hot Rod did a test on an LS2 crate motor and they put on Z06 manifolds from a 2001 + motor and they gained like 5 more HP also they gained like 8-9 HP buy running a ls6 manifold and smaller trottle body. This was on an engine dyno not a chassis one. the Z06 manifolds seem to flow the best of the stock ones.
08-06-2005, 10:46 AM
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Originally Posted by Derek 357i
I have a set of GTO manifolds and LS2 manifolds, and while I don't have flow numbers, the LS2s are much bigger and lighter. I measure the opening on the GTO manifolds at 2.0" and the LS2s at a full 2.5"
Still curious if anyone has any actual flow numbers, though? I suspect that the LS2 exhaust manifolds might be the best of the OEM options, but I'd really like to *know* before we finish the car.
