New Log Rich knock?

[allgripnoslip]

I know I have a few boost leaks but they are unfixable right now. One is the exhuast cam seal, one is the weld around the LICP boost feed nipple and the other is my weld around my J-Pipe ( nice job sbr ) anywho with that said it might be the source of my problems. This is with a 14b at 9psi in 2nd gear. Im using ECU+ to datalogg. I had to write down all of the info below then transfer it to the space below. stock injectors, intake,exhaust, fmic, hard piping.



RPM Timing O2 Knock Voltage
2584 +12 .96 1.04
2814 +12 .97 1.17
3054 +10 .97 1.14
3308 +9 .99 1.24
3594 +9 .99 .96
3877 +10 .99 .81
4196 +11 1.00 .71
4488 +12 .99 .75
4822 +13 .99 1.44
5143 +14 .99 1.80
5481 +15 .99 1.57
5818 +17 .97 1.84
6122 +18 .97 1.63
6453 +19 .97 1.39
6752 +19 .97 1.36
7031 +17 .97 1.61

 

[donmagicjuan]

As you probably know, a leak will cause you to run rich under boost, but I don't see any real problems related to knock from what you've posted. Knock voltage is a very difficult parameter to analyze alone in order to identify knock. The reason is because the ECU looks at a combination of the knock voltage value along with its rate of change to determine a knock count. I've found the best method for tuning out knock with ECU+ is to look at the knock voltage curve and the timing curve together. Look for any sharp spikes in the knock voltage curve that correlate to a dip in the timing curve. You may have to zoom in quite a bit on the X-axis to see it clearly enough. I don't see any areas in your values that look like the ECU is pulling any timing other than at the onset of boost. However, this is normal; the ECU is just transitioning across the load map as manifold pressure increases. Higher manifold pressure = less timing for a given rpm and airflow.

As a reference, when I tuned my engine with water/meth injection, I saw knock voltages ranging from 1.25-1.75 volts with no corresponding dips in my timing curve. Hope that helps.