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Old 03-12-2004 | 10:09 PM
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who has more HP

Just a silly question,LS1 or LS6,who has more pwr.
Old 03-12-2004 | 10:12 PM
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LS6.

LS1 is ~350 HP, the LS6 is ~405 HP.

LS6 is only available (factory) in Z06 Corvettes.

FWIW though, 2001 + newer LS1's use the intake manifold from the LS6.
Old 03-12-2004 | 11:45 PM
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Like mine! Isnt the LS1 basically a corvette motor?
Old 03-13-2004 | 12:06 AM
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For all intents and purposes YES, there are just a few minor differences, such as the intake on the Corvette (not manifold, but where the air intake comes in on the car) and the exhaust on the 'Vette is a true dual system whereas the F-bodies use a 2-into-1, but otherwise the camshafts used are the same (although they switched in various years for the 'Vette, and changed from '98-'00 then '01-'02 for the F-bodies). Also, Corvettes use "drive by wire" or something like that instead of an actual throttle cable connected from the gas pedal to the throttle body.....instead I think they have a computer controlled box that pulls the throttle open.

All these little differences aside, you can swap them from one car to another without having to change much at all, and on an engine dyno they will make the same power.
Old 03-13-2004 | 06:15 AM
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What about the fbird.They don't have a LS6?
Old 03-13-2004 | 07:38 AM
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Nope, LS6's are only available in Z06 Vettes, even the regular Vettes can't get them. BTW GM has a LONG history, over 20 years at least, of NEVER putting the most powerful motor they currently make in anything else besides a Vette. It's why the 350's used in F-bodies were detuned as well as detuning the GN's to make sure the Vette was still faster. It's GM's flagship car, so nothing can be faster when produced. After all who would pay 55 grand for a Z06 if you could just buy a 30 grand Firebird just as fast? Thats why they do it the way they do.
Old 03-13-2004 | 11:11 AM
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Originally posted by Capn Pete
LS6.

LS1 is ~350 HP, the LS6 is ~405 HP.

LS6 is only available (factory) in Z06 Corvettes.

FWIW though, 2001 + newer LS1's use the intake manifold from the LS6.
Wrong, the new Cadillac CTS-V has the LS6
Old 03-13-2004 | 12:06 PM
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Originally posted by 6speedZ28
Wrong, the new Cadillac CTS-V has the LS6
Sorry, forgot about that.................but a Caddy isn't really in the same sports car class as F-bodies or 'Vettes.
Old 03-13-2004 | 12:35 PM
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Originally posted by 6speedZ28
Wrong, the new Cadillac CTS-V has the LS6
True, but the LS6 won't be GM's most powerful motor anymore .. with the arriving LS2
Old 03-13-2004 | 02:09 PM
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Originally posted by 1stls1
What about the fbird.They don't have a LS6?
No. Only a Z06 has 346 c.i. LS6. A '70 Chevelle SS could have had a 454 c.i. LS6 as well. But these are two different engines

A "Firebird" will have a 3.8 liter V6. A Formula, Trans Am, or WS6 will have an LS1

Originally posted by stubbs
BTW GM has a LONG history, over 20 years at least, of NEVER putting the most powerful motor they currently make in anything else besides a Vette.
Somebody forgot about the Syclones
Old 03-13-2004 | 02:13 PM
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Originally posted by Flat_Tire_
True, but the LS6 won't be GM's most powerful motor anymore .. with the arriving LS2
LS2 is rated at 400hp
LS6 is rated at 405hp

Be intresting to see if they dyno that way.

I was watching a T.V. show that said the second year the GTO is out they are going to offer a "405hp engine" which leads me to believe they are talking about the LS6.
Old 03-13-2004 | 06:12 PM
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Don't forget about the TTA in '89. It might have been the only GM car that was faster than a Vette. Then again, it was VERY limited production, so who knows.
Old 03-13-2004 | 09:15 PM
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Originally posted by 99blackSS
LS2 is rated at 400hp
LS6 is rated at 405hp

Be intresting to see if they dyno that way.

I was watching a T.V. show that said the second year the GTO is out they are going to offer a "405hp engine" which leads me to believe they are talking about the LS6.
On paper that's what GM has stated. In reality the LS6 puts out ~360 rwhp .. not to say the LS2 will put out more or less, but GM reps have stated that the new C6 will outperform the current Z06. I guess it's a crap shoot but my guess is the LS2 will dyno better .. Plus it will more than likely have more performance to unlock considering it's base is 400hp .. where the LS6's base was the LS1 ... 300hp (350hp if you want to go with the vette's #'s) ... again according to GM

EDIT: That's some sweet news about the GTO ... Hopefully it will still be somewhat affordable after that too.

Last edited by Flat_Tire_; 03-13-2004 at 09:18 PM.
Old 03-14-2004 | 09:11 AM
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Not true

Originally posted by stubbs
Nope, LS6's are only available in Z06 Vettes, even the regular Vettes can't get them. BTW GM has a LONG history, over 20 years at least, of NEVER putting the most powerful motor they currently make in anything else besides a Vette. It's why the 350's used in F-bodies were detuned as well as detuning the GN's to make sure the Vette was still faster. It's GM's flagship car, so nothing can be faster when produced. After all who would pay 55 grand for a Z06 if you could just buy a 30 grand Firebird just as fast? Thats why they do it the way they do.

89 TTA would rape an 89' Vette

0-60
1/4 ( by over a second )
top end
Old 03-14-2004 | 02:24 PM
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2002 Camaro ZL1 phase 1 came with LS6 and Phase 2 came with 475hp LS6

and according to www.LS1.com

Question 6-9: How much horsepower does the LS1 really have?

Answer: GM's 305hp rating is extremely conservative, they didn't want the LS1 f-body to steal any of the Vette's thunder, however it's commonly known that the F-body's LS1 makes pretty much the same 345hp as the Vette's. They generally put out the same hp to the rear wheels.

The fbodys LS1 isnt detuned but its exhaust set up isnt true dual like the vette thats the only real dif.



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