Quote:
Originally Posted by dreaux
what is the difference between horsepower and torque? And what are the numbers going up the left side of the column?

Dreaux, the formal difference between torque and HP is this:
Torque = amount of work being performed (lbft) Ex. the work needed to push 1lb. a distance of 1 ft.
HP = rate at which that work is performed (work/time). Ex. pushing 1lb. a distance of 1 ft. in 1 min.
For further clarification, HP is actually a function of torque (1HP = approx. 33,000 lbft/min)... and no, that's not a typo. It really is 33,000 lbft.
The formula for converting between HP and torque is (HP = Torque X RPM / 5252). The 5252 is a conversion factor to get the units matched properly, and to change the time variable into RPM.
I always like looking at dyno curves for full size engines and making sure the HP and torque lines cross at 5250 RPM. If not, then the company advertising that engine likely messed with the scale on one of the curves to make it look more attractive (gotta love unscrupulous advertising folks). Since the nitro motors run at such high RPM, and make such small numbers, you probably have to jack with the scales on both curves to make them readable, so I'm not sure if they'll still cross at 5252.
Anyway, I know this was off topic a bit, but as you can see, the "how fast you hit the wall, vs. how far you push it" analogy is actually quite accurate.