AChevyFan wrote:

> What is the calculation for torque?
> I know the Horsepower is:
>
> HP = Torque(lb-ft) * RPM/5252
>
> But how do I get Torque?
>
>
Devide the horsepower at any rpm by that rpm value. The value of peak
torque may NOT be at the same rpm as peak HP, so you cannot compute peak
torque by dividing peak hp by rpm for peak hp. However, you can get the
torque at THAT rpm by dividing hp by rpm at the rpm for peak hp. It just
may not be the PEAK torque (which usually appears at a lower rpm).

In other words, you really need a curve of hp vs rpm to derive torque.
In fact, usually the dyno outputs torque vs rpm and you derive
horsepower by multiplying torque and each rpm. At least, that is the
way it used to be. Modern computerized dynos output curves of both,
doing the multiplication for you.