hesham

if i have ls1 5.7 block and i bought 6.125 rods and 4.030 pistons and i used 6.0 4" cranck can i make 383 strocker?

Dragkid1917

iTrader: (2)

woah woah wait. a 4 inch crank with a 4.03 bore isnt a 383. If i remember correctly, my fathers 388 CI is a 3.75" crank and a 4.06 bore (60 over instead of your 30). He was running 355 CI with just a 30 over bore (like you wanto run 4.03) with the stock 3.48" crank. On like there are calculators that tell you what your cubic inches will be, when your suggested application or 4.03" X 4.00" you get 408 CI

nobreaks254

iTrader: (50)

you cant use the 4.03 pistons in the ls1 block unless you sleeve it. For a ls1 383 you need 3.905 pistons and a 4.0 crank.

hesham

ok can i use the 6.0 crank with these pistons and 6.125 rods to make it 383
my friend told my that the 6.0 cranck is 4.0"
is this correct?

nobreaks254

iTrader: (50)

the 6.0 and the ls1 crank have the same stroke. The ls7 has a 4.0 stroke. You need an aftermarket crank.

DONAIMIAN

iTrader: (18)

Yes, the LS1 an 6.0 crank share the same stroke. If you run the LS7 crank, you will also have to use the LS7 drysump.

hesham

so i have to get an aftermarket 4" crank

thanks to all of you