Halltech

Here is a snapshot of some of the parameters I uploaded from our onboard TECH 2 Diagnostics.

This is on our Z06 which is bone stock except for the Halltech RACE Filter replacement, and Halltech LS7 Programming.

Notice the g/s on the MAF. Pretty sweet flow numbers. Also, you might notice the timing we run and NO KNOCK RETARD. This is how we achieved the 480 RWHP numbers with just our RACE Filter.



Our rev limiter is set for 7200 rpm. Interestingly, this same program running only 22 degrees of timing did well on the dyno mading 480 RWHP. The heat, low octane fuel (92) and lower rev limit recorded only 399 g/s MAF airflow, so even though the cam is long past its peak, the airflow and power goes beyond 7100 rpm quite nicely. 420 g/s would surely register bigger numbers.

JMB

Jim, how much did you change the timing here???? My stock LS7 PCM at 7100RPM was showing 25° timing when I ran at the track the other night and recorded the run using HPT.

Halltech

Here is the stock timing table (High Octane) At WOT and high rpm, the max timing is not 25 degrees. 18.5 to 20 degree total advance.

Gary2KC5

why does the file name say "LS2"?

Halltech

Because LS2Edit is used for the C6Z06 and the 2005-06 C6 as well as many other GM cars.

Jim

LTC Z06

Adding to FAQ, so I want to save the pic.

OregonC6

Well, just hope that you don't break a valve spring at that engine speed. Like the guys in the car commercial say...that can't be good.....

boosted_z06

Not so, WOT is not just at 7100 RPMs at 1.x grms/cyl but just as well at .8 grms/cyl and the timing is higher then 18-20 deg

I had my Z06 tuned last week and totally stock with a custom tune got 24 degrees with 476 HP @ 436 ft/lbs torque and that was with stock aircleaner and did not kick a hole in license plate area.
Being the stock rev limiter is set to 7100 RPMs I see no reason why you tuned your's just to add 100 RPMs

JMB

Jim, I've enclosed a recorded run that I made at the track from 2 days ago using HPTuners. I've highlighted in yellow the area that I want you to see. NOTE: HPT has a problem reading WOT for some reason and it only registers 88% throttle even though I have verified that it is 100%!

My RPM range on this run is close to what you show and my timing is 25° at WOT and my PCM timing is untouched, it is bone stock. This is why I am curious what timing you added. My assumption was that I must be operating in the 0.76 to 0.80 g/cyl range. I assumed that you must have bumped the timing beyond the 0.80 range since the timing drops to 20° once you get to 0.96 g/cyl. Is this what you did?

Halltech

These springs are tested to 8,000 rpm by Katech Engines and have been used in all their Corvette Challenge builds for 3 years.

The LS7 motor however could not be rung to that limit due to its long stroke. The resulting piston speeds would not allow much life in the LS7. I have been told that the de-stroked version of this platform loves the 8,000 mark with the appropriate cam.

Don't worry about these springs. Titanium retainers, however, should have been installed from the factory in my opinion.

Halltech

The table posted is just stock. Our timing changes are somewhat proprietary information and not for publication. Hope you understand.

As you can see, the timing (stock) varies all over the rpm band and g/cyl.

Gary2KC5

Actually I think the valve springs have more of an issue with fatigue rather than stress. At least in my case, where I broke a valve spring @ 1650 RPM after about 5 hours of low RPM driving.