Typical gain from switching from LS1 to LS6 heads on "cam only" car?
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As the title says, how much does the typical cammed LS1 gain from switching from stock LS1 heads to stock LS6 heads?
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i got 30rwhp, with TONS more low end and mid-range. car feels a lot stronger at all rpms. and for as cheap as stock LS6 heads are, it's a pretty good mod if you can;t shell out money for ported heads
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Originally Posted by transAm-98
i got 30rwhp, with TONS more low end and mid-range. car feels a lot stronger at all rpms. and for as cheap as stock LS6 heads are, it's a pretty good mod if you can;t shell out money for ported heads
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Originally Posted by cbrtrx
not arguing but if stock ls6 heads give you 30rwhp over ls1 heads then how come the latest basic ported ls6 heads are about 35rwhp over stock ls1 heads
my ported 5.3 heads gave me 35rwhp over my stock ls6 heads so does that mean that my 5.3 heads would have made 65rwhp over stock ls1 heads, i dont think so ![Happy](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_stretch.gif)
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I'll have my 2002 ls6 heads with the light weight valves for sale by next week for 550 + shipping if anyone is interested. They have rev springs good to .650 lift with about 5000 miles on them. Numbers from these heads and a g5x2ish cam are in my sig.
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If I'm correct 97-98 heads are the same (perimeter valve cover bolts) and 99-02 heads are the same internally. I've never seen a reference to 00-02 heads flowing better. I could be wrong here, so experts chime in.
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Originally Posted by jason.sabovich
If I'm correct 97-98 heads are the same (perimeter valve cover bolts) and 99-02 heads are the same internally. I've never seen a reference to 00-02 heads flowing better. I could be wrong here, so experts chime in.
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Originally Posted by jason.sabovich
If I'm correct 97-98 heads are the same (perimeter valve cover bolts) and 99-02 heads are the same internally. I've never seen a reference to 00-02 heads flowing better. I could be wrong here, so experts chime in.
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Interesting, I had no idea the casting was different. Can anyone here chime in on the difference between "243" casting heads? It seems there is a "true" LS6 version with lightweight valves and another version with normal valves that is called an LS6, but is really an LS2 cylinder head. I also read that there are casting differences within LS6 heads. The book I just finished said the heads with the small triangle casting just below each exhaust port are rumored to be worth another 8-10 hp over the regular heads.
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The ls6 heads have the 243 casting with lightweight sodium filled valves.
The ls2 heads have the 243 casting with regular old stainless valves.
The casting is the same between the two heads, only the valves are different.
As for the triangle on the ls1 heads, that means the ead was made using the SPM process, hence the 8 - 10 HP gain. If i recall correctly, all 241 heads were made using SPM process.
The ls2 heads have the 243 casting with regular old stainless valves.
The casting is the same between the two heads, only the valves are different.
As for the triangle on the ls1 heads, that means the ead was made using the SPM process, hence the 8 - 10 HP gain. If i recall correctly, all 241 heads were made using SPM process.
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I was putting 362 to the wheels with a 216/220 cam, stock heads, bolt ons and headers. I switched to the ls6 heads, 228/228 cam with dual exhaust and put down 422 to the wheels.