Using data collected at dragtimes.com, a regression analysis of 1/8 mile vs 1/4 mile trap speed was performed. Chosen vehicles were Mitsubishi Lancer Evolution and Subaru Impreza WRX and STIs as they are AWD, have forced-induction, are about the same size and weight and present similar frontal areas.
Based on 100 observations, significance F is 2.3*10-114. P-value was less than 0.05 thus we are forced to reject the null hypothesis.
y = 1.32024246643736 * x - 5.40977006570778; where y is predicted 1/4 mile trap speed and x is observed 1/8 mile trap speed.
Detailed graphs found here.
Building upon the LRT formulas as put forth by Jeff Lucius, we can estimate horsepower given the equation:
hp = (mph / 215.39)3.3135 x weight (lbs)
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