This calculator provides an evaluation of adding horsepower vs reducing weight with the change in quarter mile times as the basis for the solution. Which will go quicker?

flywheel horsepowerthe current horsepower at the flywheel
weightthe current weight of the vehicle and driver, ready to run
increase in horsepowerthe proposed increase in horsepower
decrease in weightthe proposed decrease in weight
currentet and mph for the current combination
increase horsepoweret and mph for the increase in horsepower
decrease weightet and mph for the decrease in weight
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