G'day Maxim,
Depends on what you want to do on the dyno.
Did you just want to make one run and see what it does, or do you want to have a few runs and do some fault finding and/or tuning ?
I use AutoTech's dyno (well, only been there twice), the owner seems really interested in performance cars and is very enthusiastic about doing the work - he enjoys working on cars !!
His dyno seems to give realistic figures too, I've heard of another one in fyshwick that is about 25kw more !!! So I suppose if your just after big figures, don't go to AutoTech
Cost per hour is around $130-140 I think, but your best off ringing around and getting prices as they might do it for cheaper if you only want one run and no mucking around.
J