Quote:
Originally Posted by PressEnter[]
So what numbers would you expect for the PiP. I am not willing to take my Jetta to 100 mph, but it takes 12 horsepower to hold at a steady 60 mph, and 16 at 80 mph...which is pretty close to the PiP's curve in your chart.
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Power required to overcome aerodynamic drag is proportional to velocity cubed. If you know how much power is needed at a specific speed to overcome aero drag, you can figure it out at other speeds.
If it takes 12hp to keep your car going at 60mph on level ground (assume 10hp for aero, 2hp for rolling resistance) you'll need 24hp at 80mph and 46hp at 100 just to overcome aero drag.
Rolling resistance is directly proportional to velocity, so it would be about 26hp and 50hp total, respectively.