How does a Dyno Really Work?

RustyRatRod said
I think maybe what Del is trying to say is, without a measured torque spec, you cannot figure horse power. In other words, the dyno doesn't "see" horse power, it "sees" torque and makes that conversion. So without torque, you won't have measured horse power. That much is right,

I Agree

RustyRatRod said
because torque is what spins the dyno. If da beeotch don't spin, you ain't gonna get nuffin.

I Disagree, Hp is what spins the dyno, water brake is a job and it takes power to do that job,
All power is the combined effort of rpm and torque. Yes while the engine is doing it's job a dyno can only measure torque at rpm (which is power).

Just like electricity it takes a certain amount of watts to do a job and is made up of a combination of volts and amps and all three are always present and link, just like hp, rpm and torque.