LS3 head milling
LS3 head milling I am planning an LS3 build and want to get the compression up to about 11.5. I have figured I need the cc volume to be about 65.5 but I don’t know if that will be too much much material and would be better going to the LS9 head.
What is the stock combustion chamber volume on an LS3? I keep seeing conflicting information. The head I was looking at was the Chevy LS3 CNC that is advertised at 68cc but I’ve seen sites claiming they are 70cc.
What is the stock combustion chamber volume on an LS3? I keep seeing conflicting information. The head I was looking at was the Chevy LS3 CNC that is advertised at 68cc but I’ve seen sites claiming they are 70cc.
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Joined: Jun 2016
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From: Central Cal.
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Before calculating what size combustion chambers you'll need, determine what head gaskets you wanna use. And please don't say 'stock' head gaskets. 
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
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Before calculating what size combustion chambers you'll need, determine what head gaskets you wanna use. And please don't say 'stock' head gaskets.
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
https://www.summitracing.com/parts/fel-1161l041/
https://www.summitracing.com/parts/fel-1161r041/
LS3 heads are 68.5cc.
Lets assume that milling .007 of an inch equates to 1cc.
.007 x 3.5cc = 0.0245
None milled heads are 1.615 inches thick and if you remove 0.0245 inch you would have 65cc chambers and with a .040 thick gasket you would be at 11.56:1
Lets assume that milling .007 of an inch equates to 1cc.
.007 x 3.5cc = 0.0245
None milled heads are 1.615 inches thick and if you remove 0.0245 inch you would have 65cc chambers and with a .040 thick gasket you would be at 11.56:1
Staging Lane
Joined: Jan 2013
Posts: 66
Likes: 7
From: Black Hills
Before calculating what size combustion chambers you'll need, determine what head gaskets you wanna use. And please don't say 'stock' head gaskets.
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
I recommend improving your quench and going with .040" compressed gaskets. NOTE: Stock gaskets are .051" thick.
Best of luck!
KW
