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LS3 Heads on an LS1?

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Old Jul 15, 2010 | 06:26 PM
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Exclamation LS3 Heads on an LS1?
Sorry if this has been covered before, but is it possible to put LS3 Heads on an LS1?

If it is, you KNOW what THAT means!


http://www.lsxtv.com/forum/exclusive...-kit-2898.html
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Old Jul 15, 2010 | 06:35 PM
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Nope, they need a 4.00" bore. Time for a bigger engine.
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Old Jul 15, 2010 | 07:06 PM
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Unmodified L92/LS3 heads need at least a 4" bore, so no, they won't fit a LS1.

But, some machine shops are selling so called small bore LS3 heads. I can't post a link since they aren't sponsors, but google it.
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Old Jul 15, 2010 | 07:25 PM
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Mast motorsport. But i would like to see a set on a 383.
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Old Jul 15, 2010 | 07:51 PM
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man that would look good on my 99 z28 with lq4 bottom end with ls3 heads. Does anyone know a price yet? I have looked but not found anything. Probally $6000+.
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Old Jul 16, 2010 | 02:19 AM
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$7500:
http://www.camaro5.com/forums/showthread.php?t=95036

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Old Jul 16, 2010 | 02:21 AM
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What are you saying exactly?

Originally Posted by flatchat
Mast motorsport. But i would like to see a set on a 383.
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Old Jul 16, 2010 | 08:31 AM
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[QUOTE=libertyforall1776;13606956]What are you saying exactly?[/QUOTE

https://ls1tech.com/forums/generatio...s-engines.html



The valves will not clear on OEM L92 heads with a LS1....
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Old Jul 16, 2010 | 08:56 AM
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Before i bought that for $7500 i would do a maggie and lower the kmember with spacers and cut the cowl on it. I guess its time to do a truck manifold turbo kit.
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Old Jul 16, 2010 | 04:41 PM
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Originally Posted by libertyforall1776
Sorry if this has been covered before, but is it possible to put LS3 Heads on an LS1?

If it is, you KNOW what THAT means!


http://www.lsxtv.com/forum/exclusive...-kit-2898.html
For the bucks it cost for that thing, might as well go turbo.
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Old Jul 16, 2010 | 04:45 PM
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Originally Posted by flatchat
Mast motorsport. But i would like to see a set on a 383.
Isn't a 383 still a 3.9 inch bore?
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Old Jul 16, 2010 | 07:18 PM
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Originally Posted by redz_02
Isn't a 383 still a 3.9 inch bore?
Yes, but the Mast small bore LS3 heads will fit the 3.90 bore. Unmodified LS3 heads will not.
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Old Jul 22, 2010 | 07:20 AM
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But will they clear stock ls1 pistons?
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Old Jul 22, 2010 | 09:15 AM
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Originally Posted by Jditlfm
But will they clear stock ls1 pistons?
That will primarily depend on what cam you use.
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