Quick 5.3L Head Question...
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stock they've got a smaller combustion chamber that will raise your compression. ~10.8 all things being equal. however they've got a smaller intake valve 1.89 vs 2.00 on the 5.7's. stock for stock cfm is pretty much equal.
stock they've got a smaller combustion chamber that will raise your compression. ~10.8 all things being equal. however they've got a smaller intake valve 1.89 vs 2.00 on the 5.7's. stock for stock cfm is pretty much equal.
Originally Posted by Brian Tooley
And the 4.8/5.3 head has a 3.8" chamber diameter and has to be opened up to 3.9" and have the valve changed before it makes as much power as the 5.7
Originally Posted by jrp
the stock seats will hold a 2.00 or 2.02 valve though right? only if you want 2.05 do the seats need to be changed?
I don't think the 1.89 valve in a 5.3 will make as much power as the 2.00 in a stock 5.7 head, no way.
You have to do the chamber and put a 2.00 or 2.02 valve in a 5.3 head in order to make more power then a 5.7.
BTW, I never checked that thread, you wanna flow a head? PM me or call me 330 784-5210
