Yeah, but before reflashing I deleted the Stage I ACN91 map that was on the AP and downloaded the same map from the Cobb website just to make sure. I made sure to scan for CEL codes first even though the car didn't throw any when the DAM went down to 0. No codes. I also tried another Shell station and filled up on 91 before flashing. Everything checked out so I uninstalled / unmarried the AP and reinstalled again instead of reflashing.
I took it out for a drive on the freeway, and some city driving the next day (80 - 85 degree weather). Highest count of knock was -2.8, but only when I was mashing the throttle and immediately went down to 0 after 3,000 - 3,200 RPM or so. I would get a few -1.4 when mashing the throttle at low load / RPM, but it would immediately ramp back down to 0 as soon as I depressed the throttle more and RPMs would rise.
I don't have logs of my drive at the moment but this was from my observation monitoring the AP with pretty warm weather and some city and highway driving.
AFR looks really good staying within -/+5%. Highest was +4.69 and idles between 0 and +0.78.
Intake temps have been around 90-100 degrees after a long drive.
Coolant temps 180-190 degrees driving, and 190-205 degrees idling.
The commute this morning was completely knock free, but I don't know if that's due to the ECU still learning. Outside temps were really cool outside; about 72 degrees. The true test is the commute back home since that's when I see the most knock. When outside temps are much warmer.
I've been told I had a combination of heatsoak and bad gas that caused my DAM to drop to 0 after that 3rd gear pull that wasn't even at 100% throttle. WRX hates Vegas weather. I guess it was a bad idea to do that pull after driving on the highway, too.
I just flashed the ECU a few days ago, so only time will tell how long this car will go knock free, but so far so good. I have my fingers crossed.