ChevyChad

iTrader: (50)

I am in the process of selecting the parts for my 383 build and I thought I had all the research done. Today I was talking with my local machine shop who will be doing all the machining, and the guy told me that he has had to turn just about every eagle crank down to get it right. I was planning using an eagle 4” crank for my build, but this is the 2nd flag that has been raised by 2 different people warning me about Eagle’s cranks. Also the fact that it is made in China with a lesser quality steel concerns me as well. So today I was looking on the SDPC website and noticed they have the LS7 crank for a little more than what the eagle costs (and way less than Callies or Lunati). Since the LS7 has a 4” stroke, can I use that crank for my build?

bjamick

iTrader: (31)

Free bump for ya, i really personally wouldn't know. I know in the old school motors you could do the 400 crank in the 350 chevy but whether you can do that nowadays or not im really not for sure. Hopefully sombody will chime in and inform you.

ChevyChad

iTrader: (50)

I called Matt @ SDPC He told me you can't because the reluctor wheels are different, and also the snout on the LS7 is longer due to the dry sump system. So in short- no, it is not practical.

Gordon0652

iTrader: (4)

You can't.

Cop Car

iTrader: (14)

you can put whatever reluctor wheel you want on it. the snout could be machined off to whatever size you wanted.

as for rotating on the inside of the block.. i dont know. but if one 4 inch crank turns in there it would be reasonable to think that another 4 inch crank would turn in there also.

deputydog

Yes you can. Thats what I'm doing. Change the wheel/have the snout shortened. Some say balancing is an issue but before I bought my crank I called a shop that I was refered to that balances alot of LSx motors and they said no problem and they dont have to add as much mallory metal as most people think.

I got a good deal on my crank thats why I did it. If your going to pay full price for an LS7 crank ($700-800) just buy an Eagle so you dont have the hassle.

Scoggin Dickey

iTrader: (34)

Agreed Deputy! For the average DIY'er, this project is not practical, as Chad stated.

LSXNV

iTrader: (1)

so in other words, you can, but probably wouldn't want to.
wounder what the price of machine work would be added to the price of the crank and wheel... and balance... and mallory slugs.......

ChevyChad

iTrader: (50)

Probably greater than a Callies

Cop Car

iTrader: (14)

the best solution is to get an LS2 block, LS7 crank and dry sump with L92 heads

GuitsBoy

iTrader: (4)

Im not sure the hardships of installing an ls7 crank into and ls1 go away when you use an ls2 block. An LS1 style crank like the callies or eagle are clearly the best option, IMO.

orangeapeel

iTrader: (18)

Are you really going to be making the power that warrants a crank like that? Or are you changing the displacement with it.

Whats wrong with the stock crank?

DONAIMIAN

iTrader: (18)

Well if you were to install the LS7 crank with the dry sump into an LS1 block, you would have to use the LS7 timing cover (that has the cam sensor up front) that would create a problem. The LS2 is already designed with the cam sensor on the cover so that just one less thing to worry about.

ChevyChad

iTrader: (50)

The plan was a 383. But now I'm considering using the stock crank and just doing a 347. I am guestimating 600 rwhp +/- 50 or so with 8~10psi from the procharger. I would assume the stock crank could take that??