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Generation III Internal Engine
ls2 heads on a 5.3

Generation III Internal Engine 1997-2006 LS1 | LS6

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ls2 heads on a 5.3

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Old

Apr 25, 2011 | 10:08 PM

#1

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Staging Lane

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From: thibodaux LA

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ls2 heads on a 5.3

i have a set of 243 heads is it worth the trouble of instaling with a ls6 cam??need to know before i sale these heads

Old

Apr 25, 2011 | 11:05 PM

#2

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From: Ft. Wayne, IN

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Quote:

Originally Posted by 86 g-body

i have a set of 243 heads is it worth the trouble of instaling with a ls6 cam??need to know before i sale these heads

the 243/799 castings are the same thing essentially. Gm used the 799 on the aluminum blocked 5.3. So yes they will work fine!!

Old

Apr 26, 2011 | 08:56 AM

#3

Jon@Texas-Speed

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They will work but you are going to be giving up some compression to the stock heads but gaining some airflow. If you decide to install them, I would mill them to try and gain some of that compression back if not gain some. With a LS6 cam, you should be room to do some decent milling to help out on the compression.

Jon

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Apr 26, 2011 | 08:24 PM

#4

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Staging Lane

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will it be a big rwhp gain compaired to stock with the ls6 cam and ls1 intake and tb??

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Apr 26, 2011 | 08:37 PM

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only if you mill them if you dont the loss of comp will pretty much negate the gain in airflow

Old

Apr 26, 2011 | 10:57 PM

#6

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Staging Lane

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Quote:

Originally Posted by tripblackls1

only if you mill them if you dont the loss of comp will pretty much negate the gain in airflow

ok with the heads milled what would be my rwhp ???

Old

Apr 27, 2011 | 07:47 AM

#7

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From: Central IL

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Are these the same 243's that you've already agreed to sell me?

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Old

Apr 27, 2011 | 08:08 AM

#8

TECH Apprentice

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lol..

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