What are the differences between the LS1 and Ls6 heads?

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Oct 31, 2003 | 09:19 PM

romanss

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Joined: Oct 2000

Posts: 324

From: windsor,ontario,canada Home of the fastest LS1 and LT1 6-speeds :D

What are the differences between the LS1 and Ls6 heads?

I was wondering what the specific differences were between the 2 style heads.

Thanks,

Roman

Nov 1, 2003 | 07:54 PM

Desolate_Flux

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Joined: Jul 2002

Posts: 266

I am curious as well.

Nov 1, 2003 | 07:56 PM

mr_muff

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Joined: Dec 2002

Posts: 797

From: Surrey, BC

ls6 has d-shape exhaust ports and ls1 is oval. i think, don't quote me on it.

Nov 2, 2003 | 04:36 PM

Capn Pete

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Joined: Jan 2002

Posts: 5,308

From: Oshawa - Home of the 5th-gen

Quote:

Originally posted by mr_muff
ls6 has d-shape exhaust ports and ls1 is oval.

I believe that is true

. As for the other differences, I don't think there are many "physical" differences besides the D-ports, but I believe that the valves are made of a different material (I think they're hollow or something like that as well?

) and the springs are heavier to take a higher lift cam.

Other than that, I'm not too sure?

Nov 3, 2003 | 10:24 PM

rick99ws6

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Joined: Sep 2002

Posts: 23

From: Ottawa, Canada

LS6 heads have D shaped ports, intake ports flow better, and smaller combustion chamber which raises compression to 10.5:1. Valves are hollow to reduce valvetrain mass, and stiffer springs.

Last edited by rick99ws6; Nov 3, 2003 at 10:27 PM.