I've noticed an issue with KR today and I'm not sure if its a genuine problem or if its false knock from another source. It seems to happen mostly around (after) shifts but there were a few exception.

Being that this is a FI car I really do not want to turn down the gain on the knock sensors unless I have to.

The setup is a bone stock 5.3 (lmg) with a 76mm on3 turbo kit and 850cc FAST injectors, running very rich.

I've attached my tune and a few logs.

 

anyone?

 

Looking at your high octane map, you are actually adding 2 degrees (from 12 to 14) of timing when you from 1.67 to 1.80 down in the 4200 column. Smoothing it out and removing a few degrees may help. However that does not explain the KR at 4800 rpm. Can you log per cylinder (A-H) KR?

With 10 degrees of timing, running as rich as you are, and 9.5 compression, I don't think it's real KR. You can try adding a few gallons of race gas to see if it goes away.

 

factory settings for the knock sensor sensitivity is way too high for a modified setup. I would at minimum use the settings from a c5 Z06.

Use at your own risk. JMO.

 

Intereting. I have actually made mine more sensative.

 

GEN 4 computers are little different than older GEN 3 computers that for sure.

Kinda crazy how much predicted knock and knock sensor sensitivity they put in them from the factory.

 

Last Call is referring to rich knock.

Wherever you see KR, subtract that amount in the corresponding high/low spark settings.

If it goes away, it's real. If it stays, it's false.