Generation III Internal Engine 1997-2006 LS1 | LS6
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anyone done this?

Old 02-28-2007, 07:36 AM
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has anyone out there have a ls1 that has this?: tsp 5.3 heads, ms4 cam, 393 stroker kit, forged je pistons, fast 90 mm intake, ported tb, headers tune. how much hp do u think it wil have?
Old 02-28-2007, 07:40 AM
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over 500HP, id use ported LS6 heads instead of the 5.3's.
Old 02-28-2007, 07:49 AM
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why is that? im up for any opinion
Old 02-28-2007, 07:51 AM
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They are just a better cast head to start with and they can be milled down anyway to get whatever compression you want.
Old 02-28-2007, 08:01 AM
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I'd use the LS6 head because it has an updated combustion chamber that was redesigned by GM and because with a 393 cid motor you're not going to need a small chamber head to have compression.

Ben T.
Old 02-28-2007, 08:21 AM
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With a 4.155 bore I would get 035 (6.0L) casting with welded chambers for cc required and open them up to the bore.


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