nitrorocket

iTrader: (12)

I am wondering what the power capabilities are with an unported 317 head. I am putting in larger valves, 2.055/1.60 of course. How much power has been made with what boost. For my application, I am using a stock cube LS1 7.5-8.0:1 compression and 2 60-1 turbos. Planning on over 20 lb of boost, Pumpgas only.

hellbents10

iTrader: (10)

I would say you could go just north of 900hp at the flywheel. Parish8 was at about 800hp to the flywheel.

Got Me SOM

iTrader: (2)

Raymer made like 750 to the wheels with a lot of boost and methanol injection

parish8

iTrader: (6)

i dont think the heads will hold you back much. you will have to run a little more boost to get the same numbers as a guy with heads. with pump gas and low compresion i have no idea but with good gas i bet you could go over 1000rwhp easy with those turbos, even with stock 6.0 heads.

parish8

iTrader: (6)

btw, i will be running a low compresion408 with stock 6.0heads(for now) soon. i am going to see just how much hp i can make with pump gas and then on better gas. i really think with pump i will see over 600rwhp and with the good fuel i will be likely be limited by my fuel system or turbo but still over 700rwhp. this is thru a HD 4wd driveline.

bumpin_records

iTrader: (19)

so parish your saying that if he bolt some stock meaning unported 317 heads on his motor he can make like 800 hp man thats sick. i have the same set up and now i know i can slide by with not paying all that money for the head port job and can use the money for my turbos. thats great news

silverbullet02

iTrader: (2)

How big are the stock valves?

parish8

iTrader: (6)

i am going to get a set of AFR heads sometime down the line so it isn't like i am saying heads do nothing but for $2000 there are many things that will give me a better pay off.

the only diference with what you are talking about here is seting it up for most hp on pump gas. i really dont know how that will work into things. for me with stock heads and good gas if i want more power i just turn the ****.

rod442

I never put the car back on the dyno after the change to 6.0l heads. However the car did trap at almost 129.5 at 3860+ raceweight and a 50/50 mix of 110 and 93. 10-11 psi boost.

I believe that should be well over 600 rwhp through an M6 and a 12 bolt.