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4.8/5.3 pistons?

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Old 06-12-2006, 10:41 PM
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Default 4.8/5.3 pistons?
i think i remember readin that the 5.3's had dished pistons and the 4.8's had flat top pistons?? is that true or they both the same? if the 4.8's are flat top how much would that raise the compression in a 5.3?
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Old 06-12-2006, 10:47 PM
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True about the pistons. I thought i saw something about the compression being 10.3:1 or so but dont quote me on that.
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Old 06-12-2006, 10:48 PM
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Easier to mill the heads
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Old 06-12-2006, 10:52 PM
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or if you have the block out in the first place throw a set of forged pistons and arp rod bolts then spray the **** out of it!
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Old 06-12-2006, 11:12 PM
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The pin positions are different,different length rods,so you can't use 4.8 pistons with a 5.3 crank.
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Old 06-12-2006, 11:31 PM
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Originally Posted by whitt1
The pin positions are different,different length rods,so you can't use 4.8 pistons with a 5.3 crank.
the crank is the same there all 3.622 to my knowledge


4.8 has a 6.2 rod with a flat top
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Old 06-13-2006, 07:24 AM
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And yes the pin heights are different between the 4.8 & 5.3.
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Old 07-01-2006, 09:00 PM
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so there is no way my 5.7 rods and crank will fit in my 4.8. i think i need to sell my 4.8 so i can buy pistons for my ls1.
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Old 07-01-2006, 10:28 PM
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The'll fit but all you will have is a 5.3. You would have to get 5.3 pistons of course.
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Old 07-02-2006, 01:25 AM
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he could use the 5.7 pistons, rods, and crank in the 4.8 and just turn it in to a 5.7 with a set of 4.8/5.3 heads.
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