RP 1107A - Computer Application Technology Related To Drivetrain Specifications: Conclusion

Any choices in the selection of components and specifications call for trade-offs. When seeking fuel economy, it may be necessary to give up some performance. (100 lb-ft torque can generally maintain the same performance of the next lower gear ratio.) Computer simulations will keep you informed about how much of each operating parameter (fuel economy, speed, startability, gradeability) you will gain or lose. Computer simulations are an aid to decision making, but final specifications remain the buyer's responsibility.