> Assume for a moment that you have a car with a known hp at the
> rear wheels,
> and you also know the top speed attainable with that car.
>
> Does anybody know the math for determining how many additional hp it will
> take per additional mph on the top speed?
It's a cube law, so it depends on what your original top speed was and how
much you try to increase it. The formula, roughly, is
New Required Power = (New Speed/Old Speed)^3 * Old Power
Thus, if you were making 85hp at the rear wheels and top speed was 100 mph,
then to go 110 mph you would need
(110/100)^3 * 85
or
1.1 * 1.1 * 1.1 * 85
= 113 hp
Randall
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