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Old 09-25-2009, 05:19 PM   #1
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Default LS2 heads on ls1...power gains?
I got a chance to buy a set of 6.0 heads for my ls1. What kind of power gains would i get with these heads if any at all?
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Old 09-25-2009, 05:46 PM   #2
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15hp untouched 30hp ported. Just my guess.
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Old 09-25-2009, 07:07 PM   #3
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I agree with Codygto... Probably around 15-18hp untouched..... How much are you picking them up for???? For the money they usually go for your better off getting say patriots stage 3's.... For 1200 bucks... Those you would gain about 35whp with. Better bang for buck in my oppinion.
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Old 09-25-2009, 08:55 PM   #4
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BTW The LS2 heads are 243 castings which are the same as the LS6 heads just without the hollow valves.

I have heard they are good for a solid 15rwhp or so as is and they have plenty of potential when ported.

For the right price ($400-500 max) I think they are an excellent upgrade.
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Old 09-25-2009, 08:58 PM   #5
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You get about 20 out of them.If you port the runners and polish them up you can get a lil more.How much are you getting them for?
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Old 09-25-2009, 09:47 PM   #6
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Anything over 500 bucks and i would just save a little more and get the stage 2.5 5.3L heads from TSP.
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Old 09-25-2009, 10:34 PM   #7
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A guy posted on LS1GTO a while back that he got 20 HP by just swapping on the 243 heads.
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Old 09-25-2009, 11:44 PM   #8
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Did he dyno that or was that what it felt like he gained?
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Old 09-26-2009, 02:58 PM   #9
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Quote:
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Did he dyno that or was that what it felt like he gained?
on a dyno
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Old 09-26-2009, 09:49 PM   #10
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It was on a dyno, if I thought about it, I might be able to come up with his name.
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Old 09-27-2009, 09:33 AM   #11
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I wouldn't get the Stage 3's as they are only for 4.00 bores or larger. The stage 2's are a perfect fit for your LS1. I love mine!
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Old 09-27-2009, 11:42 AM   #12
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Quote:
Originally Posted by StealthFormula View Post
BTW The LS2 heads are 243 castings which are the same as the LS6 heads just without the hollow valves.

I have heard they are good for a solid 15rwhp or so as is and they have plenty of potential when ported.

For the right price ($400-500 max) I think they are an excellent upgrade.


Those are my thoughts too.

Most sell there 243's for $450-500.

Thats what mine will be up for sale for it a bit...
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Old 09-27-2009, 05:21 PM   #13
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You also have to ask what mods you already have. If you bolt them on a bone stock 04 you may gain 15 hp, but if you bolt them on a 04 with cam and headers you might gain 25. It is all relative.
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Old 09-27-2009, 11:59 PM   #14
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i got 21hp and 30 tq
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Old 09-30-2009, 09:51 AM   #15
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Quote:
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i got 21hp and 30 tq
what mods were already in place when you switched them out?

i have the torquer V2 cam, LTs and PRC springs, retainers, blahblahblah...

im looking for a nice set of 243's too (shhhh... dont tell the woman) and was wondering what kind of gains people are seeing with a similar setup.
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Old 10-25-2009, 09:17 PM   #16
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id guess 20ish like every1 else has said.
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2004, cai, camshaft, gain, gains, gto, heads, horsepower, hp, ls1, ls2, maximum, patriot, ported, power


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