317 Head help.
Thread Starter
Racer
Joined: Nov 2006
Posts: 441
Likes: 6
From: Sunshine State
317 Head help.
I am currently running a about 10psi with 2.6L Kenne Bell on my stock 2002 LS6 engine. I'm looking to pick up some 72cc 317 LQ9 heads from another forum member in the next few days. The heads have the upgraded 2.08 and 1.6 valves on them and some dual .650" lift springs. I do not know if the bigger valves are going to be to big for my 346ci. Im looking to lower the CR and probably stick some sort of blower cam in at the same time. Any suggestions would be great.
Also what about some ARP head studs. Yes / No?
thanks,
B
Also what about some ARP head studs. Yes / No?
thanks,
B
Drifting
Joined: May 2005
Posts: 1,513
Likes: 4
From: Pl Grove Utah
I have been happy with mine for the cost.Yes,ARP studs,dont bother with the GM stuff.I have seen 18 psi a couple times,everyone says they lift around 20 but when I get my tune done we will see. For the cost,you cant go wrong,next step would be Darts .
Le Mans Master
Joined: Feb 2002
Posts: 5,970
Likes: 20
From: San Marcos Texas
the 2.08 and 1.6 valves fit the stock bore.. Most use 2.02 or 2.04 and 1.57 
if you go with a blower cam, just make sure your piston to valve clearance is ok with the larger valves. You may have to flycut your pistons for extra clearance
if you go with a blower cam, just make sure your piston to valve clearance is ok with the larger valves. You may have to flycut your pistons for extra clearance
Last edited by chriswtx; Aug 28, 2008 at 06:52 PM.
Thread Starter
Racer
Joined: Nov 2006
Posts: 441
Likes: 6
From: Sunshine State
thanks guys for the input.
Lets hope they will not hit. I dont want to tear the bottom of the engine down and replace or flycut pistons. 
What is the part of the cam that will determine if the pistons will clear? I was thinking about a cam in the low 230s / mid 230's with no more than .600" on a 112 -114 lsa. I want something nasty.
What is the part of the cam that will determine if the pistons will clear? I was thinking about a cam in the low 230s / mid 230's with no more than .600" on a 112 -114 lsa. I want something nasty.
