Ls-1 Vs. Ls-6

3674 Views 30 Replies 14 Participants Last post by bonequark, Feb 2, 2004

speed_demon_freak

Discussion Starter · Dec 18, 2003

What are the differences between the two?

Heads.... Cam....Intake?

Will parts interchange?

1 - 20 of 31 Posts

DevilYellow

· #2 · Dec 18, 2003

Well they come in different cars so they do have a different MAF and manifolds than a normal F-body... with the GTO's we will have to see.

The main difference is the heads. Flow much more. The intake and block is normally used with LS1's now anyways. The cam in the 02-04 Z06's should be comparable to a GTO cam. The LS6 also runs with a tad higher compression ratio.

They all interchange.

CMNTMXR57

· #3 · Dec 18, 2003

LS6 block has larger bay to bay breathing ports too.

crazywop112

· #4 · Dec 18, 2003

LS6 has a 6,500 rpm redline. LS1 has a 6,000 rpm redline.

CMNTMXR57

· #5 · Dec 18, 2003

LS1 is 6,250

crazywop112

· #6 · Dec 18, 2003

That's the second time I have been corrected by GOD this week. Thanks for the info.

CMNTMXR57

· #7 · Dec 18, 2003

No problem. I've bounced off of mine plenty of times to know.

'91 Formula

· #8 · Dec 19, 2003 (Edited)

CMNTMXR57 said:
LS6 block has larger bay to bay breathing ports too.

As far as the F-body goes I know they stopped using the smaller port LS1 block eairly 2002, or around that time. The ones built after then have the larger bay ports, LS6 block with the LS1 heads and LS6 intake.

LS6 intake replaced the LS1 in 2001 and 2002 in the F-bodies. I don't know about the Vettes.

CMNTMXR57

· #9 · Dec 19, 2003 (Edited)

That's a well known fact. The casting number for the LS6 block if you want is 12561168. You can also tell by the lister/finish on teh block. The LS6 has a less shiny/duller casting than the LS1. There are two plants that produced LS1/LS6 blocks. Montupet Canada and Nemak Mexico. When it came to producing the LS6 block, GM went with the Nemak facility.

What makes the difference in strength between the two blocks is that Montupet (LS1) uses a gravity feed process that uses a combination of metallic dies and sand cores. The Nemak factory uses a low-pressure precision fanning process.

The LS6 intake replaced all LS1 intakes by that time and did not incorporate EGR plumbing (the Vette version has never had an EGR for those that don't know) as GM utilized the ramp speeds and lobe separation on the camshaft to make up for it. To convert a NON-LS6 intaked F-Body to LS6 intake also requires a coolant bypass tube for up front and two block off lugs for the back. This is needed because the bottom of the LS1 intake has room for a coolant line to run underneath it to the back. The LS6 to make room for the additional runner size and what not eliminated this space. So you block off the back with those two lugs, and get the re-routing tube for up front. I also plumbed my factory EGR back into the LS6 intake.

See less See more

Larmo

· #10 · Dec 19, 2003

CMNTMXR57 said:
That's a well known fact. The casting number for the LS6 block if you want is 12561168. You can also tell by the lister/finish on teh block. The LS6 has a less shiny/duller casting than the LS1. There are two plants that produced LS1/LS6 blocks. Montupet Canada and Nemak Mexico. When it came to producing the LS6 block, GM went with the Nemak facility.

What makes the difference in strength between the two blocks is that Montupet (LS1) uses a gravity feed process that uses a combination of metallic dies and sand cores. The Nemak factory uses a low-pressure precision fanning process.

The LS6 intake replaced all LS1 intakes by that time and did not incorporate EGR plumbing (the Vette version has never had an EGR for those that don't know) as GM utilized the ramp speeds and lobe separation on the camshaft to make up for it. To convert a NON-LS6 intaked F-Body to LS6 intake also requires a coolant bypass tube for up front and two block off lugs for the back. This is needed because the bottom of the LS1 intake has room for a coolant line to run underneath it to the back. The LS6 to make room for the additional runner size and what not eliminated this space. So you block off the back with those two lugs, and get the re-routing tube for up front. I also plumbed my factory EGR back into the LS6 intake.

I'm speechless.

.

davbo

· #11 · Dec 19, 2003

Larmo, don't make his head any bigger......he already has a God complex.

Larmo

· #12 · Dec 19, 2003

Good tip.... but I do know when the respect those with superior intelligence to mine. (when it comes the LS1 and the GTO, anyway)

CMNTMXR57

· #13 · Dec 20, 2003

Hey, it's hard being me.

Just kidding. You'll find that I'm not really that smart, I just play someone who is on this internet thing.

Tails

· #14 · Dec 20, 2003

Shhhh... don't say it too loud but CMT is dyslexic. It should read DOG.

:drink: :drink:

CMNTMXR57

· #15 · Dec 20, 2003

Someone here already has "DOG" as their's and I'd hate to steal it.

tiggerfan

· #16 · Dec 20, 2003

CMNTMXR57 said:
Someone here already has "DOG" as their's and I'd hate to steal it.

We could switch

RedDevil

· #17 · Dec 30, 2003

CMNTMXR57 said:
The LS6 intake replaced all LS1 intakes by that time and did not incorporate EGR plumbing (the Vette version has never had an EGR for those that don't know) as GM utilized the ramp speeds and lobe separation on the camshaft to make up for it.

Could have sworn that 99 vette did have egr?

CMNTMXR57

· #18 · Dec 31, 2003

No LS1 Vette has had an EGR. Only F-Bodies up till '99 I think. I can never remember if it's '99 or '00.

RedDevil

· #19 · Dec 31, 2003

Its 00' for f-bodies

<----Has 00' that had EGR

Hunter98TA

· #20 · Dec 31, 2003

The LS6 kicks butt in an F-body!!!! I had a 2002 LS6 put in when the LS1 rods decided to come out and get a suntan. Times and dyno in sig.
Matt

1 - 20 of 31 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.