headed-ws6

iTrader: (34)

im looking to forge my aluminum 5.3 and shot for 750 to the ground... Will I be able to do that cam only with stock 317's? I see alot of people doing this with 5.3 heads....

Just would like some opinions...

Sarg

iTrader: (6)

I have seen results with unported 317s closing in on 1000 hp. I do not recall if it was an auto or manual transmission though.

1CAMWNDR

iTrader: (21)

Unported 317s with good valves and valve job will keep making power untill the head bolts/studs give up and you push water.

slow67

iTrader: (2)

NA$TY-TA put down over 1100RWHP on ported 317s on top of 370.

headed-ws6

iTrader: (34)

This what i like to hear. i was thinking about sending them to AI for there performance rebuild and calling it good. this will open some change to get parts that will keep the motor alive.

HydroStream6

iTrader: (16)

Unported untouched 317s here.

fastsspr

iTrader: (49)

i going to use 317 fully build in my car.

L92 fox

iTrader: (2)

If its an aluminum 5.3 why not leave it stock if you are only shoting for 750 whp. And I would just use the 799 heads the aluminum 5.3s come with. No head to drop the compression from 9.9, which is what the l33s come with. Just do ls9 head gaskets and head studs and save yourself 2000+ dollars.

Sarg

iTrader: (6)

I personally wanted to drop the compression down a little.

L92 fox

iTrader: (2)

No need for that. Stangkilr is running upper 10s with a stock bottom end and 14+ lbs of boost. The days of low compression boosted motors are over with methonal injection. A few experts on here say 10-10.5 is where you want to be.

Sarg

iTrader: (6)

Not everyone wants to run meth. I know I do not. I have seen engines damaged when a system fails, even with "failsafes."

headed-ws6

iTrader: (34)

the weisco pistons that im looking at will yeild a 10.4:1 compression with a 61cc head. I looking to get it around 9.5:1 i can pick up 317's for half the price if not cheaper then what a pair of 243/799 heads cost. Plus i bought it as a shortblock so it came with no heads at all. This will be a all out build. May even wait and go with the trickflow 205cc heads an shot for 1k rwhp with the 5.3.

The ls9 head gasket will be a must.