5.3 or 5.7 Heads??
10-12-2004, 10:29 PM
#1
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5.3 or 5.7 Heads?? What's the difference? I have noticed that the 5.3s are cheaper. I have also seen LS1 heads and LS6 heads. What is the difference? Don't they both just bolt up? Why choose one over the over? I just need to know so I can figure what direction to go with my car. It's my daily driver.
10-12-2004, 11:41 PM
#3
5.7's and 5.3's flow relatively the same and this is with the 5.3 having a smaller intake valve (2.00 vs 1.89). when ported they are again pretty much the same, the 5.3 has a smaller chamber which will most likely spec out to ~62cc when its said and done, this will raise your compression a half a point and more in conjunction with a thinner gasket. so with the 5.3 you get the same flow of the 5.7 and you get the increased compression all w/o milling.
ALL gen 3 heads bolt up. what it comes down to is your budget and application.
ALL gen 3 heads bolt up. what it comes down to is your budget and application.
10-12-2004, 11:41 PM
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https://ls1tech.com/forums/showthrea...=5.3+heads+5.7
https://ls1tech.com/forums/showthrea...=5.3+heads+5.7
https://ls1tech.com/forums/showthrea...=5.3+heads+5.7
Try that too... simple search in the internal section...
https://ls1tech.com/forums/showthrea...=5.3+heads+5.7
https://ls1tech.com/forums/showthrea...=5.3+heads+5.7
Try that too... simple search in the internal section...
