This Paid app allows you to Calculate Horsepower and estimated Mph of you Diesel pickup with the weight of your vehicle and 1/4 Elapsed Time. Also in this paid version you can get an estimated 1/4 and 1/8 Elapsed Time from entering your vehicle weight and horsepower, also by entering you tire size example 265 70 16 and your RearEnd Ratio and max engine Rpm you want to run, then choosing your truck and transmission you can calculate your MaxMPH per gear for your transmission.