LILWS6

I got a block super cheap from work it needs some work. it came out of a 2004 suburban that didnt' change the oil on for 11,000 miles no ticking no knocking just ALOT ALOT of sludge. My question is what is an ideal setup for this motor with boost? should i keep the stock internals and clean then up? I don't really know alot about boosting these things. So any help would be greatly appreciated. Thanks all

nastychevelle

iTrader: (7)

completely disassemble and clean the sludge... then get ls6 cam and springs and it should be good

LILWS6

OH i also forgot to mention i took the heads off and gave them to a buddy so it also does not have heads

pwrtrip75

iTrader: (8)

Get some 317 heads for it. drops it down to about 8.6:1 compression.

taws6m6

iTrader: (37)

don't mean to hijack here....I had the same idea and people said stay with the ls1 if I had a choice since the piston and rods were made out of the same material(weakest link).

pwrtrip75

iTrader: (8)

Ive seen a few LS1 pistons with the edges broken off, they are flat tops. The 5.3 pistons are dished, they have quite a bit of material around the edge. Also being a smaller bore they would have more structural integrity.

I dont really know whats stronger, but my stock 5.3L bottom end from a junk yard has been holding up for 3 years putting 640hp to the wheels through a really loose converter. And im not easy on it.

hellbents10

iTrader: (10)

I concur the 5.3ls are stronger then the 5.7's. I have had them to 800+ at the flywheel many times with out failure.

nastychevelle

iTrader: (7)

stock bottom end?

camarokid94

iTrader: (2)

im not 100% on this but i think 317s wont work or are not as good on a 5.3 as the valves and cylinder have issues either contacting of stopping flow.

pwrtrip75

iTrader: (8)

I have 317s on mine, they work fine. The valves are in the same position, same spot as the 5.3 heads. The combustion chamber is bigger, it overlaps the cylinder slightly. But larger combustion chamber = less valve shrouding = better flow. The 317s also have better exhaust ports.

camarokid94

iTrader: (2)

perfect lol well then there is a set here in town for like 150$ i might just have to pickup as i thought they didnt work

LILWS6

so i can reliably put down some good numbers on the stock bottom end? I don't know where to start with a parts list either. Where do i even start looking for turbo parts and other things i'll need like intake and fuel

nastychevelle

iTrader: (7)

here was my list... it should be a good start

Masterpower T-70 Turbocharger with .96 exhaust housing (t4 flange) now im going with a 75mm S400 but t70 will be good for 600hp-ish
arp rod bolts (not needed)
arp head bolts (not needed)
yellow ls6 springs
hardened pushrods
melling high volume oil pump (not needed)
cloyes HD timing chain (not needed)
ls6 cam (not needed but would help)
atleast 1 walbro 255lph pump 2 if going above 500hp
boost referenced fuel pressure regulator (aeromotive 13101 would be good)
60# injectors
2 1/2" crossover (center mount)
31"x12"x3" a2a intercooler
3" coldside
tial 50mm BOV
tial 38mm WG
some kid of boost controller
snow performance meth kit (not needed)
3 1/2" downpipe with cutout into magnaflow

https://ls1tech.com/forums/forced-in...induction.html - good read for a newbie

Josh@PremierAutosports

iTrader: (11)

I would run a little larger turbo unless you already have that one. Also stick at least a ls6 cam in there the 5.3 cam in anemic. We did a s10 with a turbo 5.3, t6 76mm and it brings the turbo on quick. Its a completly stock 5.3 longblock with a ls1 intake. We will either be installing a ls6 cam or a forged motor depending on budget.