They do the same thing on the street or dyno 3rd gear from 2500rpm to redline, so either way your getting the same log, on the street it's a real world load with air moving over the car at the speed it's moving, both are fine I just feel like it's a hassle to take it to a dyno for the same thing I can do on the street, data logging is super easy once you have it down, i plug in drive 5 minutes to the country do a 3rd gear pull come home up load it, work on other shit around the house get an email later telling me how it looked and a revision if I need one repeat as needed, once the wot revisions are done I send in some low speed driving around town stuff to look over drivability and it's done and you have an awesome all around tune