fullthrottledan

iTrader: (2)

On a 5.3, can you take it to a 4.030 bore? Not sure if .052 would be too safe to take off.

TravisH

iTrader: (1)

the 4.8/5.3 block has a bore of 3.779? and you can bore it to make it a 5.7 which is to 3.893?.

01Blackerado

iTrader: (4)

Actually even though that's very close, you're still a little bit off!! The 4.8/5.3 block can be bored safely to 3.903 to obtain a 383/6.2 with a 4" crank!!!

TravisH

iTrader: (1)

I was just giving the specs on making the 5.3 into 5.7....I thought that was all you could take the 4.8/5.3...

fullthrottledan

iTrader: (2)

370 cubes is all i want out of it. I have a 6.0 block bored out in the truck in the sig, but i have another 2003 gmc with a 5.3 thats my daily driver and needs some more motor, but didnt want to get too expensive with it.

augiedog77

iTrader: (3)

What rods do you need to work with the 4" stroke?

01Blackerado

iTrader: (4)

6.125 length rod's....4" stroke crank....3.903 bore pistons...makes 383CI

augiedog77

iTrader: (3)

thanks

On20Z

iTrader: (3)

Whta hp gains can be expected with a 383 build with 243 workd heads and a Z06 cam.I have thought about this myself.

01Blackerado

iTrader: (4)

Depends on the tune, compression ratio, flow numbers on heads, any mods done (ie: exhaust, tb, etc...), and the drivetrain!! But really anywhere from 360+hp to about 460ish with that cam!! Bone stock mods, all motor with Z06 cam, with about 9.5:1 comp ratio should have you a little over 400hp out the motor....not wheel hp!!!