Hello,
I have a 2016 ZO6 Auto w/ KN Air Intake. No wideband yet. I have been messing around with Timing, Idle, MAF and Fuel Trim hystagrams. I've been comparing my scans to others that I can find, I think it's pretty good. I'm not a pro. Some of the compare runs, the PE kicks in earlier, mine is 5,000rpm which I believe is stock. So, how does the ECM adjust the fuel, I'm only in PE for 1,500rpm and a very short period of time. Also, how does it ramp and change those values if I bring PE in earlier. Why doesn't the whole PE table ramp/ go from a lower PE 1,000rpm then max out at higher PE 6,500rpm. If the AFR has to go up and down through the rpm range, does it really get to those values so fast? The scan I'm comparing with, I didn't see the tune, just the scan. He's(Crawford Racing from 2016) about 30hp more than me, at the same specifics. His PE comes in at 3,000rpm. His car is a manual trans.. I've heard that some people start the PE Table with one value across the board and make small changes up or down and scan, then compare. I hope this makes sense? Again, not a tuner. Just learning. Buy wideband, or email tune? I like to do my own remodeling at the house, then I learn. Thanks.