[BR3W CITY]

Dyno tuning is hospital surgery while street tuning is field surgery...if that makes any sense. Tuning on a dyno allows manipulation of load, air etc to test and produce the highest peak hp and tq numbers. Its great at tuning WOT afr, WOT shifting, and general tuning in the higher rpm range. Since you in a safe, closed space, running at a "simulated" 75mph is easier and safer than on the open road.

Street tuning is more about getting the most driveable car. It changes how a car feels under the curve...how it feels at tip in, light throttle etc. The truth is, both street and dyno tunes are needed to produce the "best" car. Befor I could do any tuning on my own, my truck had a tune that was done on a dyno and thats it. We found out a while later that the tune (while making average numbers) was done very poorly. There were lots of areas that were super rich, and others crazy lean demanding 100% injector cycle. It worked, but it was the wrong way to do it.

Moral of the story; you can survive on a street tune only, but having both is best.