i was just wondering i am building a forged ls1 and keeping the stock crank and i was wondering if i have to change out the crank. i am planning on running about 1000 rwhp and didnt know if i had to change out the crank or not. so please help me out and let me know if the stock crank can handle this abuse. thanks
WTF 1000RWHP !!!!!!!!!
With that power I guess you must forge the onstar too!!!!!!!
Read somewhere that the LS1 stock botoom is good for about 750HP to the flywheel, beyond that don't know.
Need a Freakin' Roll Cage, and a Death Insurance
I hear 1000HP to the crank, not the rear tire. 20% drivetrain loss on some vehicles would limit it to 800HP. I'd like to know how you plan to get that much HP out of an LS1. You'll most likely need billet main shaft supports. I don't thing the powdered metal ones will handle that much HP.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
you can get 750 hp out of a aluminum block but the cast iron block from the heavy duties can handle i think 1100hp but is at least a thousand on the cast iron though
<div class='quotetop'>QUOTE(skates @ Nov 3 2006, 12:22 AM) [snapback]72037[/snapback]</div>Any proof that the iron can handle more than the aluminum?you can get 750 hp out of a aluminum block but the cast iron block from the heavy duties can handle i think 1100hp but is at least a thousand on the cast iron though
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2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
iron can handle more than aluminum, but i dont have time to prove it right now. i know for a fact u can have thinner cylinder walls with iron, but thats common knowledge.
They both have their pro's and con's. I'd have to go with aluminum because you don't see a cast iron block in an 8000 hp funny car. LOL
Just my 2 cents.
97 GMC, 2002 LS6.
1991 GMC Syclone #1428
I doubt that an 8000 HP top fuel aluminum block ever drives further than 20 miles in it's lifetime.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
ever seen an aluminum can??? ever thumped it and dented it? point proven...
Aluminum does well or else GM would not build engines with it. There are many guys running mega HP engines using the aluminum blocks. The 6.2L block is aluminum. The only reason to really go with cast iron is expense and the ability to bore the cylinders oversize. Until GM came out with the L92 engine it was cheaper to buy the cast iron blocks for the lsx based engine buildups. It is still cheaper to go with the cast iron engine but I know if I had the money and were to do it all again I would buy an L92 block and stroke it. Saving 100 lbs on the weight of the vehicle is going to save you fuel and reduce your 1/4 mile times by .1 so why intentionally slow yourself down with a steel slug when you can have light weight aluminum. My old LS1 block and LS6 heads are off at the machine shop getting redone. That is how much faith I have in those parts. The only bad part about the aluminum block is the cylinders can't really be rebored.
If you honestly think that steel is so much more superior to aluminum for performance, get rid of your aluminum heads and switch over to the cast iron Gen3 heads.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
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