Originally Posted by Kaptain Kirk
it'* a 96 Z28. Trap mph =hp. only reason isnt running low 11s is the clutch and it still has the stock 10bolt rear with 4.10s
Yes MPH = HP, however horsepower is hardly enough to tell you much of anything about an engine. There could be two cars with identical aerodynamics, weight, gearing, etc...., and one could have a 200hp engine, and one could have a 300hp engine, and the one with the 200hp engine could easily be a quicker/faster car. The one with 200hp could have the advantage in a number of ways. It might have 200hp throughout the whole powerband, where the 300hp engine might just have a peaky powerband that hits 300 and drops off real quick. The 200hp engine also might have 300ft.lbs. of torque, whereas the 300hp engine might only have 200ft.lbs of torque. So really trap speeds don't tell you much. They pretty much tell you peak horsepower, it is a good way to compare how well the engine was running between different runs, but it hardly tells you how much actual average power the car puts out.
But you can't really say X trap speed = X quarter mile time without knowing the power curve of the engine in the car. This is why a GTP running 12.8'* traps at ~108mph and a ZO6 running the same times is trapping 115mph...the GTP has MUCH MORE low end torque than the ZO6 but the Z06 has a high power peak which pulls him along to the high trap speeds on the topend. Thats where the saying "horsepower sells cars, torque wins races" came from.
IMO advertised horsepower for cars should be average horsepower instead of peak horsepower, but thats not how it is measured because horsepower sells cars.