Gordon0652

iTrader: (4)

What is most LSx Cranks good for/ safely good for? hp? at the crank.

Stang's Bane

iTrader: (22)

There have been several well over a 1K. As far as I know, one has never failed from too much power, I could be wrong though!!

2000LS1TA

iTrader: (26)

I have heard that they are good up to 750 RWHP

Gordon0652

iTrader: (4)

ok, thanks!

Top Secret

I've read in a book that a SAFE rwhp is 600. So probably 750 at the crank or so. Of course, there are those that would say otherwise. =)

Karlo

This Book Tells me 500 hp max for a stock crank.

gnx7

iTrader: (28)

The number of stock LS1 crankshaft related failures can be counted on one hand. They are stout even though not a forged unit. With rolled fillets on the main journals that helps to strengthen them... having 6 bolt main caps is another bonus.

How much power do you want to make and how do you propose to get there? ie n/a, nitrous, force induction....

Forged cranks are only around $600-750.... so it isn't much to upgrade to a stronger one if you have any doubts.

NoGamesLS1

iTrader: (16)

Has anbody heard of one breaking?

TwnTrboCE

iTrader: (43)

I've gone 8.50's at 168 with a stock LS1 crank in a 3700lb car. Crank was in perfect condition when the motor was pulled apart.

Harlan I believe went 8.20's or 30's at 170 with one also.

Were going to see what a LS7 crank can do in my next build. Looking for 7's.

y2khawk

iTrader: (5)

Yep, figured it was about 1100 RWHP at that point.

And the stock crank in my truck has 30k+ miles on it at 12psi, figure that's about 500RWHP with the stock 5.3L heads on it. The crank itself has a little over 55K miles on it.

don't believe everything you read in a book