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Generation IV Internal Engine
Whats my compression ratio?

Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

Whats my compression ratio?

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Nov 18, 2014 | 09:17 AM

#1

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From: Austin Texas

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Whats my compression ratio?

Block
Ly6 iron block gen4
Forged .03 over wiseco pistons +4 cc
stock rods
stock crank
LS3 heads with a minimal mill job to surface them
OEM .051 MLS head gaskets

From best I can tell I am right at 10.5:1 but I not 100% certain on that.

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Nov 18, 2014 | 09:30 AM

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11.3, probably missed something in your calculator

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Nov 18, 2014 | 10:03 AM

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Stock heads are 68cc right?

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Nov 18, 2014 | 10:10 AM

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68.5 I believe, so I used 67 in the calculation since you said they were milled slightly.

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Nov 18, 2014 | 12:16 PM

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From: Conroe, TX

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Quote:

Originally Posted by redtan

11.3, probably missed something in your calculator

I get the same as you. Gotta make sure you put in that 4cc in as a dome and not a dish.

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