Lawnboy

iTrader: (54)

Has anyone broke a stock LS1 crankshaft ?

I might be reusing my stock LS1 crank in my 347 forged rebuild , running a D1-sc and up to 18 PSI .
Debating on weather i should use the stocker .

01 M6 SS camaro

Diamond -8.6cc blower pistons
Eagle ESP H-beams with ARP 2000 rod blots
DM performance LS1 bottom end engine girdle
ARP main + side stud kit , ARP Head stud kit
SLP ported oil pump + double roller chain.
TR 216-230 blower cam
Absolute speed ported heads (300 CFM at 550 lift) ferrea valves
LS6 intake/Ported T-body
Texas speed double valve spring kit
Compcams push rods , lifters
Harlen sharp Stock rocker rebuild upgrade
thats about everything!

Beaflag VonRathburg

iTrader: (176)

KP, ran his with a stock crank for a long time. He was clicking off 9.0s with it.

Lawnboy

iTrader: (54)

cool, I see a lot of guys running the stocker with no problems,

Shawn @ VA Speed

iTrader: (3)

We pushed over 1000rwhp with no problems-you should be fine

psi_2_high

nawww ull be fine

99mongooSS

iTrader: (4)

re using mine.

Asmodeus

Stenod Perfomance has a couple guys pushing 1400+ on a stock crank, I believe Ohio Boys are also running a stocker in the 7's (1/4 mile). In fact, I don't know if I've ever heard of a stock crank failing before..

01'WS6

I believe the new firing order and cam design that GM started using with the LS engines helped the cranks out alot by cutting the stress probably in half.

418redz28

iTrader: (10)

thats good news. im going to put a stock crank in mine as well.

DONAIMIAN

iTrader: (18)

Im 99.9% sure there hasnt been a crank failure to date in a gen3/4 motor.

robertbartsch

the six bolt design that holds each crank bearing in place helps too...

2000_SS

iTrader: (24)

this is very reassuring for me as well.....i haven't ever heard of one failing either....


seems like someone on here woulda broke one by now....

kp

iTrader: (34)

I ran one for two years (well over 300 passes) in my 347 and I'm running a stock (6.0L) crank in the new LS2 I just put in. Matter of fact the crank that was in my 347 was a well used crank out of Distortion_69's M6 car.

Crank and bearings looked fine when i took the 347 apart. I dont think I would use one in a 8000+rpm 1500hp setup but these are some pretty tough little cranks..

Lawnboy

iTrader: (54)

WOW , crazy **** , I cant believe how strong the stock crank is , so i guess there is no need for a compstar

kp

iTrader: (34)

Depends, if you dont have a crank buying a new OE one vs an aftermarket one isnt a huge difference so I would buy aftermarket if I was starting from nothing. Pretty easy to find good used stock cranks cheap though. Like anything else it depends on your budget and power goals..

Lawnboy

iTrader: (54)

I want 650-700 RWHP , And yes i have my stock 01 crank in my stock blown long block now .