Quote:
Originally Posted by tasdrouille
Assumptions/approximations:
- The idling engine requires 2 hp
- Steady state at 1800 rpm requires 15 hp
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(I'm assuming that is a diesel specific BSFC map?)
Why idle? EOC requires 0hp
What did you base the numbers 15hp for steady state and 45hp for accelerating from 45mph to 67mph on?
Steady state should depend on the Coefficient of drag,
Acceleration should depend on both the weight of the vehicle and the rate of acceleration.
In a motorcycle, very low weight and high CoD, it would take less hp to accelerate relative to steady state; in theory the benefit would be more pronounced. On the other hand, my truck is much more aerodynamic than my EX250 bike, and weighs 11 times as much, so lower power needed for steady state and higher to accelerate. If your numbers were for a car, considering how close they ended up, it still seeming like I shouldn't expect to see any benefit.