Ferocity02

iTrader: (59)

Have this idea rattling around in my head... I currently am running my stock LM7 with ~115k miles and am thinking it may not last long with my ~600rwhp goal. Apparently the rods are pretty weak on these motors and will be the first thing to go. So I'm thinking of building up another 5.3L as a spare.

Block: My thought is to use a used 5.3L iron block, or would an aluminum 5.3L block be able to handle the power? Is a Gen IV iron block better than a Gen III?
Crank: Stock should suffice.
Rods: No idea.
Pistons: No idea.
Rings: New, gapped for boost?
Misc: ARP rod bolts. New main and rod bearings. Maybe ARP main studs?

What sponsors can build this for me? I can't find any that offer a simple 5.3L online, but perhaps I just need to ask them.

smokeshow

iTrader: (16)

Get a 2005+ 5.3. Will do 600 easy.

nonnieselman

iTrader: (10)

in stock form..

Ferocity02

iTrader: (59)

You mean a stock junkyard 5.3L motor?

That would be the cheapest option, but if I'm going to replace the motor then I might as well spend a little more and beefen it up. 600rwhp is the goal, but once I reach it then it's onwards and upwards

Ferocity02

iTrader: (59)

About what power are they good for?

smokeshow

iTrader: (16)

Spend as much as you like, its your money. But the late model 5.3 will probably last forever at 600 with a proper tune.

fastlsx463

do head studs, cam, rod bolts and springs

Blackpanther99

iTrader: (8)

600 RWHP will be a cake! Get a specd cam for the turbo you will be using, springs, better rods, head studs, and 60lb injectors.

GMCtrk

iTrader: (27)

How much boost in general will it take to hit 600 rwhp on a 5.3 in a truck?

Chevy_King1500

iTrader: (7)

≈15#'s