Why do you use throttle percent? Is there some where in your tune you change the throttle angle by the logged percent? Or in your tune do you change the throttle angle by degree? If you have a max of 82* and you're at 82*, that's 100% throttle. Are you commanding 100% throttle or are you commanding a throttle angle of 82*? If you have your max throttle angle set any different than what you're calling that will throw it off. You should post a tune and a datalog because there can be more than just one reason why your datalogs are not showing 100% throttle, even though you probably are at WOT angle.
If you want the feel of throttle cable, Enable the Pedal Follower and tune that.
throttleangle.JPG