Coonass350

iTrader: (19)

hey guys i was just wondering how much boost a stock bottom end will take safely in an ls1?? or would it be safer to get forged internals first?

Gordon0652

iTrader: (4)

Forged is always safer!
Stock end can only with stand 5-6psi with a tune, maybe 8psi if your lucky!
Forged can be endless!
Take some time and read the stickies, they will help.

417 Motorsports

iTrader: (2)

https://ls1tech.com/forums/forced-induction/827929-gt-47-240-hit-dyno.html

hellbents10

iTrader: (10)

We did 735/745 to the tires with a stock long block ls2 in gto.

quik01ss

iTrader: (24)

Im on 10 PSI and untill I blow the rear or the bottom end out of the car I'll fix it

70Stang

iTrader: (2)

640 here on 9psi



FORGED is MUCH BETTER!

datsbad

iTrader: (3)

all stock internals here , made 710 , turbo 400 trans. This was on 12 psi.
Been 9.98 so far .

Willem @ Fuel Injection Concepts

iTrader: (2)

don't go getting people to join the insanity bandwagon now...

Willem @ Fuel Injection Concepts

iTrader: (2)

i ran 6.5 psi on a stock bottom with twin gt35s.. mustang dyno run showed just about 589rwhp corrected. Lasted for a WHILE of beating... blew it up with 20 psi

Josh@KY-Turbo

iTrader: (120)

Now that sounds like fun.

Hmm gonna do the Cam only thing for a little while. Then I am gonna throw one of my turbo setups on it with a nice turbo cam and see what happens.

geeteego

iTrader: (1)

Mine grenaded at 9psi and 626rwhp.

Hugger Z

iTrader: (4)

7psi here with upgraded valve springs/pushrods & fuel system. Rest of the engine is completely stock. 508rwhp with a safe street tune. Engine had 89k on it when the turbo's went on. Just put it in storage with almost 95k. We'll see how long it lasts like this. Hopefully another year or two. Then I will probably rebuild it.

barnat

iTrader: (59)

****,that aint nothing,I know a guy that knows a guy who told his buddy,that his buddy ran 25 psi to his stock LS1,,,,,,,,,,,,For about 4 seconds LOL!!!You guys crack me up!!I think this guys looking for SAFE ADVICE LOL!! 5 to 6 ps1 and even then. if you plan on boosting from stop sign to stop sign like I drive your better off just finding a block now and just put money into it here and there,and it will be done when you need it, because EVERYBODY,eventually puts a built bottom end in, if running boost !You dont here to many 100K stock LS1 s running boost LOL!!**** youde be lucky to hit 60K norm/asp without hearing some piston slap ,let alone throwing boost it it TOO!!!LOL!!

Josh@KY-Turbo

iTrader: (120)

Very true point. There are alot of guys who are gonna push the stock short block until it blows. Some will make insane power before it pops. Some wont. Its been proven time and time again that you can run 7-8lbs on the stock engine with a safe tune. Just use common sense when tunning, driving, and building if your overall budget doesnt allow to fix what breaks.

forcd ind

iTrader: (7)

where can you find a lot of diff forged pistons for ls type motors-i have an lq4 that i want to replace the pistons with stock forged dished, maybe 4.010, but all i find are flat tops or something like 8.6 comp-doesnt seem to be much of a varity, unless i have a gen 1 or b/b engine-i am gonna run a disc & intercooler

Reject

iTrader: (24)

call the manufactor if you cant find what you need and tell them what you need, they will be able to build it for you

headpunter

can you run more boost on an ls2? what about the ls7 aswell?

Reject

iTrader: (24)

if you search, you will find that the ls2 on average hold to about 700ish

52172

iTrader: (2)

whats the difference between the two shortblocks that changes their hp level? Is it just better rod bolts?
Question is refering to ls1 vs ls2.

hellbents10

iTrader: (10)

The rods them selfs are stronger, bigger, beefier.