ss performance

iTrader: (17)

I have a chance to pick up a LQ9 with 317 heads cheap.

I'm wondering if the 317's are good heads. I haven't seen much in the way of flow numbers, which I know can lie. So I'm wondering if I get these if they are worth porting or should I save my time and money and get some AFR or Trick heads.

My goal is to build a supercharged motor looking for 1000+ rwhp.

Thanks

onefast84

They are a great head for supercharged or turboed app. My n/a carb lq4 went 11.60s with those heads, and a stock bottom end.

sreve

iTrader: (3)

Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches

Stock Head Flow Numbers
Chamber 71.06cc----0.100---0.200--0.300--0.400--0.500--0.550--0.600
Intake 210cc-----------66-----142-----196---228----236---238-----240
Exhaust 75cc----------59-----104-----137---155----167---173-----177

Blackpanther99

iTrader: (8)

They will work good on your application IMO. What supercharger are you interested in using?

Guitar

iTrader: (9)

I hope so. I am planning on using them on my application (boosted LQ9).

ss performance

iTrader: (17)

I'm looking into a 2.9 Whipple. There are some fitment issues with my 02 Camaro but I thing it can be done.

KCS

iTrader: (20)

They're pretty good heads, similar to 243/799 castings but with a larger combustion chamber. They should work really well for your combo since you could use lower compression to your advantage.