imxz28

Just got the new Jim Pace catalog!!
The ported LS6 heads are ported to open intake and exhaust, have a 3 angle valve job, milled to net 11.1 CR and allow .57 lift.
What kind of power would this net with a hot street cam?
The complete kit is $2195 (something like that price as I recall).
Anyone try this set up??

J-Rod

Most likely these are the GM SCCA CNC ported LS6 heads done by LPE for GM. You can look on SDPC2000.com and find the heads there also. They have a fairly big runner volume, but some folks have had good luck with them.

JoeyG

I've been looking at this package as well, thought about getting it and selling the cam for a different one. To many decisions tomake. :crazy:

EvanZR1

I've been thinking about these, here's the GMPP specs:
"88958622 Head, Gen 3 Aluminum Racing
This cylinder head starts with the production LS6 cylinder head and is then CNC ported for maximum flow. It is the cylinder head of choice for Corvette showroom stock road racing. With this cylinder head and the ASA camshaft, Gen 3 engines can approach 500 horsepower in racing applications. This cylinder head includes production LS6 valve springs and valves.

Technical Notes: These ported heads are race only. Not for street usage."

This is the cam they recommend putting with it:
Part # 12480110 "Gen 3" V8 ASA Camshaft:
The "Gen 3" engine is used in all 1997 and later Corvettes, and 1998 and later Camaros. This camshaft is designed for ASA racing and has .525" lift on 110 degree center line. Use with "Gen 3" LS1 engines only.
This camshaft is designed for ASA racing and has .525" lift on 110* center line with 226 degree intake and 236 degree exhaust duration and .050"

The question is which cam to put with them for the best combination of power and streetability. I don't mind a little "lump" in the idle, but my car is a daily driver. Here are some of the cam choices (I'm including the 01 LS6 as a baseline):

01 LS6 cam:
525" lift
204 intake / 211 exhaust
116 lobe (? not quite sure on this one)

02 LS6 cam:
.550" lift
204 intake / 218 exhaust
117.5 lobe

ASA cam:
.525" lift
226 intake / 236 exhaust
110 lobe

LS1 Hot Cam:
.525" lift
219 intake / 228 exhaust
112 lobe

Or some kind of aftermarket cam with intake/exhaust similar to the ASA but lift like the LS6 ??? I'm not an expert on this stuff, so I'm really not sure what effect the lift and lobe will actually have on power and driveability. If anyone can explain it (in one paragraph or less), then please jump in.

The main reason I'm looking at these heads is I'm going to get the engine reringed sometime in the near future (used 1 qt last Saturday at the track), and it would be a perfect time to put on some new heads (since they have to take the heads off to do the rering).

YOULLUZ

I too am looking into the CNC LS6 heads. I would like to run the wildest cam w/o having to notch pistons. Looking for 450RWHP.. Anyone there yet w/ these heads ?

CJS

I went with stock 2002 Z06 heads and the TR .220 cam, see sig. With the ported heads I would go with the TR .224/.561/114 cam, at least, to take advantage of the porting. TheTR .224 cam has passed sniffer emissions, and is well liked by all who use it.