[boxermania]

Gunter

When one gets time on a dyno there are a couple of options, a fixed price, which typically includes one base run and a second run to verify the first run. Some other operators might provide 3 runs, one base, one to verify and one to tweek fuel, timin, etc.

Or you can engage the dyno by the hour and you can do whatever you want.....generally you get the dyno operator but no tech to change fuel or timing settings.

However, there are some shops, like Imagine Auto in Kansas that part of their business is performance improvement kits. They have a Mustang 4 wheel drive dyno and not only will they dial in your car but also pretty much know what works and what doesn't.