Dyno Test?

I know that a dyno test tests the hp and torque of my car but what else. And also where can i get one done.

When you run your car at a dyno, you will get hp & torque at the wheels not at the flywheel. And, that's it... So, you might be a little surprised as to how low your performance had gone. That's just because it measures performance at the wheels... which is a more meaningful figure imho...

For Chicagoland dynos (& surrounding area), this thread in the Central U.S. board...
Dyno tuning in Chicago area? (http://www.automotiveforums.com/vbulletin/t25049.html)