AlexLs1

iTrader: (1)

Im a bit confused.
Does the motor in an 04 GTO is it an Ls6 or an Ls1.

Does it have 241 or 243 heads, how does the cam compare to an Ls1 cam versus a Ls6 cam. Is it hotter in anyway if you will?

Any replies are appreciated.

Thanks

1INSANEGTO

iTrader: (13)

04=ls1

05-06=ls2

motorheadmike

The 04 GTO LS1 is kind of a 'special child'. It has an LS6 block and intake with LS1 cam and 241 heads.

slow

iTrader: (7)

it's a ls1, simple as that.

Ryan

ExTurbo

Its basically the same motor as the 02 SS's cam wise...you could swap an LS6 cam into it but i dunno why you would since you could throw a GT2/3 cam in there and make some pretty good power and still not have it be noticable. my buddy put down 370 with stock exhaust manifolds and that cam in his 04 goat (he did switch to 243 heads though)

oct03gto

iTrader: (15)

Actually, to be correct.

The block is an LS-6 casting with a milder cam and LS-1 241 cylinder heads. As well as the non EGR LS-6 intake.

AlexLs1

iTrader: (1)

Thanks for the resonses fella's.

What do 04's usually dyno stock to the wheels then, regardless of the tranny?

AshyLarry

iTrader: (8)

300 - 320 ish

yellowjacket48

iTrader: (3)

You have to consider the weight of the car too....I have an 04 GTO A4. I have headers, exhaust, tune, converter, CAI, PP throttle body and some other goody's and a WS6 trans am would prolly still walk me. Trans am's r just nasty fast!! I wouldn't back down from one now with the converter installed, but before, yeah....I would definetley tuck my tail. If you are looking at an 04, you can buy 243 heads for cheap....like $300. And if you are gonna swap heads, you might as well swap cams as well...reasoning behind that is you will swap springs and pushrods, so might as well do it while everything is apart. Just my two cents on the deal.

yellowjacket48

iTrader: (3)

Oh, and I don't know how much RWHP I'm putting down with all my mods....don't really care either....all HP is is just a bragging right...torque is what u feel in the seat of your pants!!

AlexLs1

iTrader: (1)

All good points thanks guys.

I'am looking at an 04 maybe an 05 if I can swing the cash for a daily driver.

Good point.

ExTurbo

Ls2 Fw

AlexLs1

iTrader: (1)

I know, that seems to be the way to go, I think nowadays with whats out there, if you buy an LS1 get a c5 or F-body.

Or you can be silly like me and want an 04 GTO for DDing.

mrtosh

What's soo silly about owning the first production GTO in over 30 years???
Collector item! F-body LS motors make 25 less HP and less torque. Plus give me a good ol fashioned throttle cable over a remote controlled throttle body(LS1vsLS2)anyday.... Automatic+Flybywire=****. I did a cam install on a friends '06(and will be shortly putting a stall in for him) and did not like the feel at all, when I was driving it home before the cam swap, hit the gas....delay....downshift....meh... Yes I've driven all three years(not that there was any discernable difference w/the '05-'06) '04 and '05-'06 and can tell you that there isn't that much of a difference(stock-stock). With a set of LT's and a tune I pulled on another buddy's '06 GTO w/no problems, numerous times..

ExTurbo

Sure the LS1 can be faster than a stock LS2 if you start modding it. And the Throttle by wire i have no problems with in my M6...its all about what you can afford. The LS2 will always be that much faster mod for mod, and your getting better brakes and 18's potentially. Theres nothing wrong with LS1 GTO's though i just love my LS2...430whp cam only

PS if they ever made an Ls3 version id be sitting here saying why the LS3 is better than the LS2. Bigger is always better when it comes to motors boys!

AlexLs1

iTrader: (1)

Sorry Tosh, I was being somewhat sarcastic, I didnt come off as I was, sorry.
I too have seen similar situations with Vette's and friends, C5 vs C6's.


An Ls3 in a GTO would be a very nice addition. It is all about what you can afford yes, the Ls2 will always be superior mod for mod. I however prefer some things on the Ls1 over the Ls2, and vice versa.

Tosh did you ever get your Corsa on? I was curious to hear a sound clip with that reverse split?

Rob

iTrader: (6)

The '04 GTO LS1 is identical to the F-Body '01-'02 LS1. Right down to the cam. Same heads(241), same block and intake(LS6). The exhaust manifolds are different and later LS1's had different water pumps(LS2).

I ran the GT2-3 cam in my car. I stopped telling people I had a cam because nobody would believe me because it sounded so stock. With long tubes/cats, SLP pulley, Speed Inc CAI, and tune, it put down 368/360. With the addition of GMPP LS6 65cc heads, it put down 393/380. With the stock cat back, nobody ever had a clue It sounded stock and looked stock. Drove like stock but with a lot more power. Great setup if you are looking for stealth and undetectable.

AlexLs1

iTrader: (1)

Thanks for the input.
That must of been fun on the street, I bet you have some stoires with people with shocked looks on there faces.

Rob

iTrader: (6)

Yep. Even had some saying I had hidden nitrous somewhere. It ran 12.3 the only time I had it to the track in that last configuration. After that I changed the cam and put a Corsa cat back on. Didn't take it to the track like that because the stock clutch couldn't handle it. Put a LS7 clutch in but ended up changing the cam and again to something milder, along with putting the stock cat back on.

But the GT2-3 was a great running combo. Sometimes I just wish I would have kept the car that way.

AlexLs1

iTrader: (1)

Those are some good times for the power with the weight of your car.