Algodoo

Hmm, it's only got 12000 torque max, and 8000 at 45 rad/s, so it's only like 600 hp? Still a perfectly useable amount of power though

Oups, I will correct. But how do you measure?

Well, take your torque in nm times your rpm and divide by 7124.

What i said earlier was wrong, it does 10000 nm at 45 rad/s. So 45 rad/s is 430 rpm, and if we do the following equation -

10000 (Torque) * 430 (rpm) / 7124 = 603 hp.

If you want to be even more precise then you could build all kinds of specialty equipment (like this) but this equation works nicely if you want to just get a quick idea for power

Ok the scene is what i was looking for.

For the equation I use: Nm * rad/s / 736 = HP It's the same but don't need to convert rad/s => rpm

How do you use the dyna ? what I need to connect?

OK, here's what I do.

First of all, the dyno is not phunlet safe so you can't just make it a phunlet or copypaste it into another scene. So figure out what all the scene.my.variables your engine uses are and then save the entire engine as a phunlet. Then open the dyno, delete the engine I already have there and then declare all the vars your engine uses in the new scene, and put your engine in and connect it to the gray circle with the red hinge by an axle. Then adjust speed until you get the highest hp.

Or just look at this.