Quote Originally Posted by WINDSOR
You need a loaded dyno like a mustang or a dyno dynamics to simulate the full weight of the car. A dynojet basically you are just accelereating against the weight of the two big roller drums which are not even close to the true weight of the car unless its a very light car. tuning on a dynojet works but i'd always put a safety margin in the tune just to be safe especially when tuning on pump gas.

A street tuned car will always be better imo. You drive the car in the real world not the dyno room.
i used to believe that too because that's what everyone said...however, i originally street tuned my car and the afr were nearly identical on the dynojet. that's when i decided to not street tune anymore due to safety, liability, etc.