1bad99

I know this might not sound quit right but, Could you make decent power with a set of 317 heads with a good turbo cam and tune? Reason im asking cuz few things have come up and might not be able to do my headers for the turbo right this second. And i dont want to change cam twice, Sooo i was wondering if i put a turbo cam in the car with 317 heads and tune it, Will it make decent power till the turbo goes on. And will drivability be ok for DD?

armyboyatc

iTrader: (29)

Depends on what cam, what CC the heads are (if milled).

1bad99

Thinking bout goin with a TR224 114 .

Stoney667

iTrader: (3)

The 317's flow just as well as the 243/799 heads. They are just 72cc. A lot of guys use them for turbo setups because of the lower compression. If you mill them I would ask someone with PTV knowledge about the cam. I think you'd be okay though but that's not my expertise. I know when i talks to EPS about milling my 317's i was limited on cam options.

bww3588

iTrader: (49)

Lack of compression will give it turd like qualities, but it will still make decent power...if you mill the heads to give it more compression without the turbo, You can't go back.

My opinion, find a set of used stock ls1 heads for now, then just do a head swap when the turbo goes on.

Stock 241's are cheap and you Will likely make more power with them as it will give you better compression.

custm2500

iTrader: (11)

Wile there are many factors, is there a general hp figure for dropping or raising one point of compression?

ls11998

I have 317 with a 230 232 cam on my c5 the car impress me how it runs, and on my ta going turbo 317 and stock cam or buy a 01 z06 cam good turbo cam

1bad99

So i should keep my LS1 heads for now till the turbo goes on? The thing is the motor is coming out when i get back from VA and new barrens and gaskets an all bells and whistles gonna be new but pistons, rods, and crank.

1bad99

What would be a good NA cam, but can also be used for boost. I know might not get all power when boosted just curious.

bww3588

iTrader: (49)

your looking at going from 10:1 to about 9.5:1 with 317's over LS1 heads. if your going with 317's, get a .040 gasket, that will keep it about 10:1.

Now, this is all assuming a stock bore stock stroke, stock piston LS1....

1bad99

Yes engine is 100% stock. Only mods will be Cam, timing chain, oil pump as far as engine goes. The rwhp #'s arent too important, but i would like to get away from the 300 ive been sitting at for a while now.

RedRocketZ28

iTrader: (19)

You should still make decent power N/A with 317's. I was considering doing the same thing but have decided to finish my turbo build all up at the same time. The cam I am going to run is the TU1 from Speed Inc. (225/225 .581/.581 113) and after talking with those guys they said it would do just fine in an otherwise stock LQ4 for the time being.

Blk98Vert

iTrader: (2)

Just run it for now, it will be fine

1bad99

Any particular numbers you guys recommend asfar as CC and flow specs on the 317's

5.0 LsX

iTrader: (7)

i just finished this same swap
stock ls1 block
futural f7-114 cam
double roller
317's milled .030 all upgraded valve train
prc rockers
fast 102/102
42lb injectors
fluidampr
long tubes
stock maf, because i plan on procharger or turbo
made 420rwhp / 370trq
under 3.5k only made 5-10hpand tq more over stock w/ bolt ons
daily driver, drives just fine....

5.0 LsX

iTrader: (7)

figured with .030 off of the 317's im at about 9.8:1

KC Henry

Yes it is possible.

For exmaple, I am using a Stock 6.0L with the factory original 317 heads and my Cam-Only set up runs very well.

JoshuaGrooms83

iTrader: (2)

question on the the 317 heads and gaskets...
whats the difference between 317 heads and .40 gaskets and running stock 241 heads if the compression is damn near the same? i mean with 317s and .040 gaskets we are looking at 10:1CR even while with stock heads and gasket we are at 10.1:1CR. why even bother? the point of the 317 heads is to drop compression so we can run boost and mroe of it safer right?

bww3588

iTrader: (49)

Given the heads and gaskets are setup to get the same compression as you have given, the 317's with a .040 gaskets will provide better quench volume, allowing a stronger flame front, allowing more timing and in turn more power.

Aside from that, the 317's have better ports and chamber design making for an overall better cylinder head than the 241's or similar.

JoshuaGrooms83

iTrader: (2)

oh ok.
i get that the 317s flow simular to ls6 heads just have bigger chambers. Im just wondering about the gasket thickness due to trying to figure whether to run LS9 gaskets or .040 cometics. I know the cometics would yield a higher CR but wasnt sure if that a good thing with boost since we are trying to lower the CR in the first place by running 317 heads with boost