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Generation III Internal Engine
unsure about heads...

Generation III Internal Engine 1997-2006 LS1 | LS6

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unsure about heads...

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Old

Jul 16, 2003 | 08:14 AM

#1

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Launching!

Joined: Mar 2003

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From: Central Va

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unsure about heads...

the heads i put on are 862. they have the same ports as the 241 i took off. is this a regular 5.7 or a 5.3 head? i was told the 4.8 and 5.3 had these kinda heads...

Old

Jul 16, 2003 | 09:05 AM

#2

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Joined: May 2003

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From: RainbowCity,Alabama

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Re: unsure about heads...

862 castings are 4.8 / 5.3 truck heads.

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Jul 16, 2003 | 12:20 PM

#3

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Launching!

Joined: Mar 2003

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From: Central Va

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Re: unsure about heads...

so that is why the combustion chambers looked so small.. so if that head had been milled .030" what would the approximate CR be on an otherwise stock engine?

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Jul 16, 2003 | 03:37 PM

#4

Constrictor 98TA

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Joined: Nov 2002

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From: Chicago Heights, IL

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Re: unsure about heads...

Im pretty sure a .030" mill on truck heads is worth 11.5:1 in an LS1.

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