cylinder head specs - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-01-2007, 05:19 PM   #1
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Default cylinder head specs

does any one know what the combustion chamber size of the LN3 cylinder head (NA engine) and also the combustion chamber of the L67 cylinder head (SC series1)? Or better yet a place on the net where I can go to find these specs. I am in Iraq so going to the local machine shop is out of the question.
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Old 08-01-2007, 05:46 PM   #2
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I have all the specs at home. I can get back to you tonight. Shoot me a PM to remind me.

I have GM'* master prints for the S1 L67 heads.
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Old 08-01-2007, 10:10 PM   #3
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If I bolt on my LN3 head to my L67 will I increase, decrease, or not affect the compression ratio
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Old 08-01-2007, 11:12 PM   #4
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I can't tell you that. I don't have the master prints for the LN3. I'd suspect absolutely zero change.

If you want to change compression, shave the heads. I wouldn't suggest that though. There are much easier ways to do that, like raising your effective compression through boost.
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