How accurate is the hp calculator? I went to the track last night and ran 106.89 mph @ 7225lbs. My time was only a 13.60 because I have a 2wd on 22s and was spinning pretty bad. 2.367 60'. The truck has Warren Diesel 190/75s, Powermax w/a Batmowheel, ID tuned 58v ficm, Airdog 2 165, built...