any advantage for unmolested 5.3l heads?

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Apr 13, 2009 | 01:45 PM

jason00ss

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any advantage for unmolested 5.3l heads?

i know alot of people are running worked over 5.3l heads, but i was wondering if there is any gain with the unmolested 5.3's over unmolested 853/241's? i have a small budget for my heads choice, and trying to decide to port my 853's, go with stock 5.3's, or stock 243's.

Apr 13, 2009 | 01:56 PM

Unertl42

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you'll bump up the compression with the 5.3L heads so it'll give you a boost in hp

Apr 13, 2009 | 03:44 PM

DONAIMIAN

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The 5.3's have a smaller intake valve than any of the other heads. I think its a 1.89. That will most likely counter any gains from the boost in compression.

Apr 13, 2009 | 08:21 PM

Old SStroker

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Quote:

Originally Posted by jason00ss

i know alot of people are running worked over 5.3l heads, but i was wondering if there is any gain with the unmolested 5.3's over unmolested 853/241's? i have a small budget for my heads choice, and trying to decide to port my 853's, go with stock 5.3's, or stock 243's.

unmolested adj. "Not interfered with, disturbed, or harmed."

LOL! Perfect description, because too many heads are "molested" in the pursuit of power. Shoot, many people even use computers to molest them.

From your choices, 243s with some milling and the correct valve job would be my choice for BBFTB (Best Bang For The Buck), assuming you can score the unmolested (can we say "virgin") 243s for a reasonable price.

Jon

Apr 14, 2009 | 05:19 AM

jason00ss

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but when it comes down to it, VIRGIN 243's will give me a bigger bump in hp and torque than VIRGIN 5.3's? i don't think i'll be able to afford to buy heads then have them worked on.