1fastz

iTrader: (16)

Is it possible to have a budget build up using a 5.3 liter motor and do the following? Thus making it a 5.7 liter iron block? Any benefits? Will it make just as much power with bolt ons as a LS1? or less? can it handle more nitrous?

What are the pros and cons of doing this? Becuase this setup can be put together for pretty cheap... just need your opinons

Iron 5.3L Block (Over bored to fit 5.7L LS1 Pistons)
10/10 Gm Forged Crank
Speed Pro Competion Series Main Bearings
Speed Pro Competion Series Rod Bearings
Gm Cracked Rods
Speed Pro Hypereutectic Coated Pistons
LS6 High Flow Oil Pump
Speed Pro File to fit Plasma Moly Piston Rings
Custom Crower Cam
Chrome Moly Pushrods
.600 lift Beehive Valve Springs
Comp Cam Lifters
2002 LS1 241 Cylinder Heads Milled .030 with stock valves and GM Seals
VR Performance Composite Head Gaskets
Complete Engine Gasket
Powerforce Balancer

rubbersidedown

we've done it- .120 5.3L Ran it on a whippled silverado for 2 years and 70,000 miles with no problems (except the truck started itself on fire in a cornfield)

pist0lpete

iTrader: (3)

I am not sure that speed pro Hyper pistons exist for LS1's. I could be wrong though but I couldn't find any oversize Hyper pistons for the LS1 when I was doing my rebuild

shanekennedy

iTrader: (1)

you may be on to something. 5.3's are dirt cheap. if you can build it up stronger than 5.7 for less than cost than 5.7, it sounds like the way to go.

brad8266

iTrader: (23)

This has been done plenty of times and is well known about. The thing is that you have to bore it out a bit to get 5.7L which will make the cylinder walls a bit thinner, which can lead to weakening. I am sure if built and tuned right it would be very reliable. Keep in mind tough that the 5.3 block is also iron which is much heavier then the aluminum LS1. Thats why i am just gonna spend the extra $$ on the ls1 block, i dont want to add weight to the car.

shanekennedy

iTrader: (1)

5.3's are also available in aluminum

brad8266

iTrader: (23)

yeah but they are not the ones that you find for cheap.

lewroe

iTrader: (2)

I can get 5.3 longblocks for $600 if anyone is close to Arkansas.

IOwnCalculus

I would also imagine that the aluminum 5.3's would need to be resleeved and not just punched out.

philntx

iTrader: (8)

I believe the aluminum block is about 65 lbs lighter than the iron block.

Whistler

iTrader: (46)

closer to 100

pwrtrip75

iTrader: (8)

LKQ on ebay sells the whole 5.3 complete w/ harness for $500. They only list them once in awhile. Thats what I got mine for.