[BerinG]

i would still get some pulls on the dyno.. but when you bring your car on the dyno from start to finish.. it can take a long time and we all know its not cheap.. so by doing it on your own time, you can still save and you'll have it done to how you drive even.. then when you think everything looks good or as good as you can make it..

then you can bring get it on dyno and tune for power with your already pretty accurate numbers.. you still saved a sh*tload of time and you can continue to do changes after that.. if you feel something the tuner made wasn't how you'd like it.. comes down to having control whenever you like