We charge $650 a day to dyno.... included in that is paying for 3 employees (myself, the dyno operator, & one other SDSS employee) for an entire day to work on setting up engine/tune/remove engine.....

I don't really allow customer to do much at all to motor themselves that day if they are there, they sit back & watch.

The cost of that piece of equipment (new state of art dyno)& the special room it is ran in, water system etc is over $100K... that's also big part of what you're paying for. For that kind of $ it should be on nice well kept dyno in a nice test cell.

If you're dynoing at a hole in wall place with no built in dyno test cell etc. on a 20+ year old homemade/hodgepodge dyno I'd expect cost to be less. I've seen lots of videos on youtube of some pretty ratty looking dynos/cells/rooms that I know I would'nt want to test a motor on/in & would be embarrased to charge $650 to dyno on.