This is really disappointing. I want to run a tune in this thing but it doesn't look like I can. I loaded an 87 octane tune with an SCT X4 and it detonated with 91 octane in the tank, so I put the stock tune back in and logged that. This thing will hit 7 on knock WOT with the stock tune running 91 octane. I tried multiple stations after running the tank dry, so it should not be fuel unless it is all Cali fuel. The logs show it wanting to get the advance down to 10 on multiple logs. It is higher in 1st and 2nd, but in third when the load is higher it always gets down around 10 on advance. I looked at a log from a stock 17 and it is running 16-19 degrees in second gear and 14-17 degrees through 3rd. After only running about 5 minutes, mine was 15-18 in 2nd and 10.5-14.5 in 3rd with knock reaching 3.75 in 3rd. This looked better so I was feeling some hope. Then, 45 minutes later after running a tight windy road, 3rd had 10-13 advance with knock peaking at 3. It must have been commanding a lower base timing because of warming IAT's or ECT's. I did another run a couple minutes later and it had 9-11 degress in 3rd and the knock peaked at 7.5 at the top of 2nd and through the shift to third. For the first couple hundred RPM in 3rd after the shift retard, it was only 5 degrees. The Sport is all stock with only 6k miles. WTF is up with this thing?
What could the factory have f'd up on this thing causing it to run on 91 octane like it is 84 octane? I don't think it is false knock detection
since I heard audible knock with the tune. Lambda is rich at 0.78 to 0.82 so fueling looks good. The load is maxed so the MAP is good. I have not logged any part throttle stuff.
Thanks
