if this was just a rebuild not much. The 4.8 and 5.3 only had 15hp difference between them. My 4.8 made 450hp/450 tq on 10psi. Depends on how much performance you were looking for.
if this was just a rebuild not much. The 4.8 and 5.3 only had 15hp difference between them. My 4.8 made 450hp/450 tq on 10psi. Depends on how much performance you were looking for.
Name: Mark,
God created turbo lag so nitrous trucks could have a chance.
http://www.ls1truck.com/forums/my-ga...tml#post274877
What did the pistons you took out look like?
Bad call by the machine shop. The crank and pistons are for a 5.3L so all is good. I'm glad I had a chance to write you guys and look online, or I would have call the wrecking yard and looked like a ass!
Thanks guys for th quick help
Carnell
easiest way to tell with the heads off is if the pistons are flat-tops or not. 4.8 has flat; 5.3 has dished (except the L33 - it had flats too, but was an aluminum block)
00 FRC - just top end, exhaust, and a hot-air intake
99 Sierra - 5.3 / 5spd
↓ click the pic for the build ↓
I read that last night. I'm glad I took allot of pictures during the tear down
What is the CR of the L33? Wonder if its worth the work to switch the flat tops into my 5.3.
Last edited by Duct_tape123; 10-07-2010 at 09:44 PM.
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2boostedSilverado: I like Casey's rear end, I want to chat with him about it
If you look at the pictures, you'll see that the pistons have rims, unless it's been rebuilt, it's a 5.3L. Due to wear, I had to get new pistons. I'm not sure if they are going to be flat tops
it's a little higher than 10:1, it's a nice engine and runs good.Originally Posted by Duct_tape123
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