Calculators : Calculate your Horsepower Following the directions below, enter in the cars stats (you can change average default) Your Car : Vehicle Weight With Driver : (in Pounds) Quarter Mile time : (in secs) Pref temp outside (not inc in cal.):     77 (any warmer impacts performance) Website Release Version v4.0. Copyright RX-8 Tri State Club 2004 - 2008. Please Read Legal Notice and Disclaimer RX-8 Tri State Club ByLaws - All members please read.