Pontiac GTO 2004-2006 The Modern Goat

ls2 heads on a ls1

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Old 07-29-2007, 07:07 PM
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Default ls2 heads on a ls1

what all do i need to make this happen. i am getting my hands on a set--taking them in to get cleaned up a lil -- can i still use my intake manifold?

also gettin the cam as well-- would it be worth while to put it in?
Old 07-29-2007, 07:22 PM
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Yes and yes.
Old 07-29-2007, 07:32 PM
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LS2 heads = 243 castings, will fit onto LS1 no problem.
LS1 & LS6 manifolds will bolt up to LS2 heads no problem. Same bolt pattern and port shapes.

Assuming the LS2 cam is the factory fitted stock item, it will not work in LS1.

The stock LS2 cam does not have the cam reluctor at the rear, so your LS1 cam sensor will pick up no signal. You could put the LS2 front cover with front cam sensor onto LS1 but that's a lot of extra bother.
Old 07-29-2007, 08:35 PM
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Originally Posted by HSV-GTS-300
LS2 heads = 243 castings, will fit onto LS1 no problem.
LS1 & LS6 manifolds will bolt up to LS2 heads no problem. Same bolt pattern and port shapes.

Assuming the LS2 cam is the factory fitted stock item, it will not work in LS1.

The stock LS2 cam does not have the cam reluctor at the rear, so your LS1 cam sensor will pick up no signal. You could put the LS2 front cover with front cam sensor onto LS1 but that's a lot of extra bother.
glad to know about the cam. now i just need to decide on a cam.

something from one of the texas sponsers.
Old 07-29-2007, 10:17 PM
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Originally Posted by CABRO
glad to know about the cam. now i just need to decide on a cam.

something from one of the texas sponsers.
I got 43 HP out of a tiny little "224XE" grind from Texas Speed.

My car isn't daily driven, but I can comfortably say this cam would be great for a DD.
Old 07-29-2007, 10:41 PM
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about to put stage 3 ported 243 on my 04. let you know what cam i go with
Old 07-29-2007, 11:06 PM
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nice this is great info.
Old 07-29-2007, 11:13 PM
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Originally Posted by DeepBlueZ
I got 43 HP out of a tiny little "224XE" grind from Texas Speed.

My car isn't daily driven, but I can comfortably say this cam would be great for a DD.
what lobe seperation.
Old 07-30-2007, 04:23 PM
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Originally Posted by CABRO
what lobe seperation.

113
Old 07-31-2007, 04:16 PM
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Works for me!
Old 07-31-2007, 09:24 PM
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hey foster did you just throw the ls2 on or did you do something to them first.
Old 08-01-2007, 06:11 AM
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People are getting good gains with LS2 heads and the HPE S cam, mine is waiting install...
Old 08-01-2007, 01:33 PM
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Originally Posted by CABRO
hey foster did you just throw the ls2 on or did you do something to them first.
I bought them from a friend who pulled them off his Vette so they're not new. They have EDC Gen III springs on them and only had 1200 miles on the valvetrain, so I just had them cleaned up a bit. Should've milled the hell out of them but its my DD and I figured I'd stay a little conservative. My mistake!
Old 08-01-2007, 04:53 PM
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Originally Posted by KtownGoat
People are getting good gains with LS2 heads and the HPE S cam, mine is waiting install...

that's a big stick though, with a fairly peaky powerband.

If CABRO is looking for a daily driver-type cam, I wouldn't suggest it. For a weekend cruiser though, that would make for a very mean setup.
Old 08-01-2007, 05:08 PM
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There are actually quite a few people on ls1gto that daily drive the old grind S cam, that is why I got mine, you know what they say, pick out the cam, then go one size bigger! ('cause you will wish you had later)
Old 08-01-2007, 06:42 PM
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Originally Posted by KtownGoat
There are actually quite a few people on ls1gto that daily drive the old grind S cam, that is why I got mine, you know what they say, pick out the cam, then go one size bigger! ('cause you will wish you had later)

don't believe all of what you hear man....I did a TON of research before i selected a cam and one of the facts of LSx modification is that BIG cams like the S-cam WILL sacrifice streetability, not matter how well they're tuned.

One of the common myths is that "the right tuner can make ANYTHING daily driveable!" and it's simply not true. There are some people who are willing to put up with a lack of engine vacuum, a hellaciously choppy idle, a power curve that resembles a big single turbo car, single-digit fuel mileage and a car that rocks back and forth enough to rattle bolts loose on a daily basis.

Thats doesn't mean it's for everyone. Can a big cam be reigned in with good tuning to at least be satisfactory on the street? sure it can, but If you're not prepared for a BIG change in the demeanor of the car, a big cam in a daily driver is not for you.

that said, if you're cool with said change, go for it. You'll make a ton of high-end power.

personally, I like being able to put around shifting at 1500 RPM to keep my exhuast semi-quiet when I want to. I like mid-range punch, and I like the nice mix between power and comfort/reliability that a smaller cam delivers.

In general, what I'm saying is that you should examine your own goals for the car. Think hard about exactly what you want in a modified car and plan your modifications with that goal in mind. Don't necessarily put your faith in people you don't know on the internet as EVERYONE has different tastes.
Old 08-04-2007, 12:24 AM
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thanks for the info everyone. droping my heads off as soon as i get them.
Old 08-04-2007, 09:06 PM
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S-cam puts down nice peak numbers but its under the curve is lacking. It and cams like the MS3 are torqueless wonders.



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