| :Power is Energy/unit time. If you don't know what the symbols in the following stand for, read a book! P = 1/2 m*v^2/t thus t = 1/2 m*v^2/P = (a constant) / P
:So you know time (t) to get to 60 mph (the "v"). You know your two values for horsepower P. The mass "m" of your car is gonna stay the same.
:So plug and chug...put in your initial 0-60 time and initial HP to find the constant: constant = t*P
:Now plug in your new HP, that constant you just found, to find your new time t_new = constant/P_new = t*P/P_new
:(One problem. You are probably putting in the peak horsepower for P and it should be the average horsepower for the above equations to work. I suggest you just ignore the problem, implicitly assuming the mistake "scales" at the same rate as P and thus cancels out. Probably good enough for the kind of bench racing that interests you.)
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11:04:41 06/09/04
