I need some opinions guys. I did some testing last night and this is what I noticed:

RPM - 3275
MAF - 134 gps
KM/H - 127
Coolant Temp - 80 C
Total Spark Advance - 32
KNOCK RETARD - 9.4 d
O2 - 990mv
Cell # 15
BLM/INT - 128
LV8 - 197
PW - 11.08

From my little experince and little research i think that the PW is too rich. Should't it be like 12.5 at WOT?

Also what would cause soo much retard?

These numbers are when i was in 4th gear and I stepped on the gas. It was on a flat road, just me in the car.

Cold night, -20C, 1200 AM.

I am looking for sugestions/opinions.

Thanks.

 

I don't see anything that indicates a 11.08 AFR.
You have to look for answers on the retard. too much timing, or not enough fuel generally are the causes. BUT mechanical noise can trigger the K/S ie an exhuast rattle.

 

PW is the injector pulse width, not AFR, and at the RPM you're at, it's nowhere near being maxed out. Your O2 reading is quite rich, most usually shoot for low 900's to high 800's, but what you really want it whatever gives the most horsepower.

If it's taking out 9 degrees and you're only getting 32 degrees total, that means that the spark advance table is requesting 41 degrees at that point. You need to back off your spark advance at that area in order to keep it from taking out too much.

 

Sorry i forgot to add the AFR from the excel chart.

It shows 14.71 all the time but at that example above it shows

AFR of 11.17

The PW was 11.08

Is that too rich?

Grumpy and Greg thanks for your suggestions.

BTW, I have my base timing set to 9d, and using a stock chip.

 

I'd say yes, that is a little too rich. I'll say what Grumpy would say: give the engine what it wants. To do this, you need to try leaning it out some and see if the power (and/or 1/4-mile trap speed) improves. If it does, try some more until it stops making more power or increasing the trap speed, then back it off a notch.

The bumped-up base timing is probably what's causing the knock retard since you were actually trying to run 44 degrees of spark advance at WOT at mid-rpm. Most engines can't handle that much s.a. in those high-load conditions, hence the knock and retard.

 

Thanks Greg.