It also depends on their dyno setup. If they have an in-ground dyno then it doesn't take as long to setup. We have an above ground dyno and it's outside so we have to drag our dyno computer out to it, and hook everything up. It takes about an hour just to get the truck setup on the dyno, then about 30 minutes or so to do 3 pulls (allowing for adequate cool down time between each run) and then another hour or so to take everything apart. We charge $125.00 for three pulls. On our dyno days though we only charge $50.00 for 3 pulls.