Alright guys im about to order a crank. Heres the dilemma. I posted a few days ago asking about crank sizes. And came to the conclusion that i need to stay with a smaller crank. Now i have a choice of a 3.48 crank (stock) or the 3.75 (383). They are only a 50 dollar difference from where im looking. I already have a set of Lunati Pro Mod Billet 6.125 Connecting rods sitting in my garage. So Please help me choose and pick the best one. BTW its going on a Turbo LS6 and hoping to make around 750rwhp.

 

depends on the size of the turbo your goign to go with.

 

whoops sorry T76.

 

um the stock crank size for an ls6 is 3.62", and when on the stock 3.90" bore equates to 346 cubes, if it has a 3.90" bore with a 4.00" stroke equals 382 cubes.

 

I would say bigger is better but then I do not claim to know a ton about turbos either. I would think more displacement would get it to build boost sooner and be able to make more power in the end as well.

 

Yeah, 3.622 stock and 4.000 for all stroke 382/383
IMO stay stock crank, just get it micropolished and nitrated. Keep the money for something else, you'll need it. (unless you're rich $$$)

 

okay now im confusing myself a lil. if the stock crank measures at 3.622 then what the hell what a 3.75 crank measure out to?? BTW i have a bare block so i need a crank. Its under a grand which is alot less then i thought i was gonna pay.

 

we are talking ls1 right?

 

Ls6.....

 

Same same

 

358 CID. I don't know if that is an LS1 crank or not.https://ls1tech.com/forums/advanced-engineering-tech/565199-list-bore-stroke-combinations.html

 

Its not, im a dumbass. Ive got an LT1 right now and still learning on the LSx. I called and asked and they said it wont fit. thats why i was confused on the crank sizes. Hey Predator im NOT rich lol. Im in E-3 in the NAVY lol. Where can i get my crank micropolished and nitrated at? And if i do it will be good with boost? Thanks.

 

Well does anybody know where i can get a crank micropolished and nitrated? and roughly what itll cost.