Running a custom E85 tune which I experience some kind of hard cut over 6000 rpm in 4th or 5th gears. It feels like I've hit the limiter but obviously I'm no where near that RPM. It isn't consistent in that yesterday at the track I could do a 10min session and not have it once, then go out an hour later and have it occur every single lap. Haven't experienced it on the street but I had the same scenario occur when I tried the OFT E85 tune last year at the same track.
Have uploaded 2 logs, log0076_extract.csv definitely had it happen at the end.
http://www.datazap.me/u/dave/e85?log=1&data=15
Stock tune doesn't do it so I'm convinced it is something related to the tune. Had my tuner there so tried increasing the Engine Load or MAF Limit's but didn't help and not game to play with anything else while not on the dyno. His normal platform is tuning Evo's so has asked me to investigate here in the hope we can find the issue quicker.
Couple of variables, car is stock bar overpipe back invidia exhaust. Weather isn't a factor as it did it when ambient ranged from 25-35 deg C. Fuel level is irrelevant as it occurred with a near full tank.