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Nov 25, 2008 | 05:58 PM

454navyss

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From: Providence Village, TX

heads

what are the stock heads on a 2002 5.3? would a set of 241s resurfaced .010 and fully refreshed 25000 miles ago be worth swapping?

Nov 25, 2008 | 06:16 PM

tallChevy

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From: Douglas Georgia

no the 241s are not good heads. maybe some 243s. or just save some money and get some ported 5.3 heads.

Nov 25, 2008 | 06:35 PM

dirt track racer 81

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From: Hennessey, Oklahoma

still just to have 243s you have to have them milled quite abit to retain stock compression ratio

Nov 25, 2008 | 10:18 PM

fastrt

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From: Midlothian, Texas

are they 706's? some one chime in.....if so I would keep the 706's and do a pnp and step up on the valves and a .030" mill and bump up compression in the 10.X to 1 range.

Nov 25, 2008 | 11:21 PM

southern_chevy

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From: Sulphur Springs,Tx

I am with him^ find you a good machine shop around there and let them work over a stock set of heads and will them .030-.040.

Nov 28, 2008 | 11:37 AM

cwalker2006

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From: dumas, texas

if you mill the stock heads that much. will it require you to use premium octane fuel?

Nov 28, 2008 | 05:25 PM

fastrt

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From: Midlothian, Texas

Quote:

Originally Posted by cwalker2006

if you mill the stock heads that much. will it require you to use premium octane fuel?

yes, but gas is $1.50 a gallon....so I like the higher comp idea, I wonder how much it will bump up power?

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