Bowling's Optimum Shift Calculator

Input Parameters Are the Following:

Transmission Ratio One = 3.14 to 1
Transmission Ratio Two = 1.80 to 1
Transmission Ratio Three = 1.20 to 1
Transmission Ratio Four = 0.90 to 1
Horsepower = 100 at 4500 RPM
Horsepower = 110 at 5000 RPM
Horsepower = 118 at 5500 RPM
Horsepower = 120 at 6000 RPM
Horsepower = 128 at 6500 RPM
Horsepower = 110 at 7000 RPM
Horsepower = 100 at 7500 RPM

Computation Results:

Using the Criterion for Maintaining the Same Horsepower Before and After Shift:

Finding Best Shift Placement Points For Ratio 3.14 to 1.80: Error: Search outside range - need more RPM range in HP table! Finding Best Shift Placement Points For Ratio 1.80 to 1.20:

Found optimum shift RPM at 7125, which achieves 104 horsepower and lowers the RPM To 4750 after shift

Finding Best Shift Placement Points For Ratio 1.20 to 0.90:

Found optimum shift RPM at 6917, which achieves 114 horsepower and lowers the RPM To 5188 after shift

Maximumizing the Area Under the Horsepower Curve:

Finding Best Shift Placement Points For Ratio 3.14 to 1.80:

Found optimum shift RPM at 0, which achieves maximum area under horsepower curve, and lowers the RPM to 0 after shift

Finding Best Shift Placement Points For Ratio 1.80 to 1.20:

Found optimum shift RPM at 7500, which achieves maximum area under horsepower curve, and lowers the RPM to 5000 after shift

Finding Best Shift Placement Points For Ratio 1.20 to 0.90:

Found optimum shift RPM at 7493, which achieves maximum area under horsepower curve, and lowers the RPM to 5620 after shift

Bruce Bowling
bowling@cebaf.gov
Bowling Superior