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LS6 vs LS2

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Old Dec 23, 2006 | 06:18 PM
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Default LS6 vs LS2

I have a built LS6 sitting here and a stock LS2. Is it worth taking the heads and cam from the LS6 and put them in the LS2? Whats involved in making the LS2 a 402? This is all for a camaro race car if that matters on which motor.
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Old Dec 23, 2006 | 07:56 PM
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what heads & cam are on the ls6 ...

and the ls2 402 is just the ls2 with a longer stroke.
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Old Dec 23, 2006 | 09:14 PM
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the heads on a ls2 motor are ls6 heads. Not sure on cam specs for a ls2 i would think they might be the same or a liittle bigger because the motor is bigger. You need a 4 inch crank to make the ls2 into a 402. Might need bigger rods for the bigger stroke.
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Old Dec 23, 2006 | 11:53 PM
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Originally Posted by NSTG8R
what heads & cam are on the ls6 ...

and the ls2 402 is just the ls2 with a longer stroke.

The ls6 has cnc'ed 243 heads that have been ported and polished with a 231/234 .643"/.598" 111 LSA cam.
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Old Dec 24, 2006 | 12:09 AM
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Originally Posted by minytrker
The ls6 has cnc'ed 243 heads that have been ported and polished with a 231/234 .643"/.598" 111 LSA cam.
well the ls2 has the ls6 heads minus the sodium-filled valves .. so stock for stock it's really a toss up

... but since the ls6 heads are "done-up", if it were me, i'd go for the ls2 block, swap the heads from the ls6 put the ls2 heads onto the ls6 (sell that entire engine) and put a bigger cam (240-260s seem to be the norm) into the ls2 as well as possibly a nice new crank.

but thats what i'd do.

the LS2 block is a nice piece of work and definitely capable, from what we've seen so far, of handling a very decent amount of power. It's got an increased oil flow and if im not mistaken thicker cylinder walls.
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Old Dec 24, 2006 | 12:10 AM
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Originally Posted by sams96
the heads on a ls2 motor are ls6 heads. Not sure on cam specs for a ls2 i would think they might be the same or a liittle bigger because the motor is bigger. You need a 4 inch crank to make the ls2 into a 402. Might need bigger rods for the bigger stroke.
minus the sodium-filled valves ...
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Old Dec 24, 2006 | 07:03 AM
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mild port job on L92 heads w l76 intake..on forged 402 ls2 bottom end.

Sell the built LS6 as it is.

Last edited by JerriVette; Dec 24, 2006 at 07:07 AM.
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Old Dec 24, 2006 | 08:24 PM
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Why minus the Sodium Filled Valves, I thought that was a "plus".
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Old Dec 24, 2006 | 09:01 PM
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Originally Posted by vmaquera
Why minus the Sodium Filled Valves, I thought that was a "plus".
It is a plus, they cool better and are lighter, so there is less valve float. I think he was saying that is one of the differences.
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Old Dec 24, 2006 | 09:14 PM
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Originally Posted by Z28TOZO6
It is a plus, they cool better and are lighter, so there is less valve float. I think he was saying that is one of the differences.

... yes the ls6 had the sodium filled valves (which is a plus), the ls2 ones that even though they are still a 243 casting they no longer sport the same valves.
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