I'm going stage 1 (i think) i got the AP and is getting here tomorrow... Do i need the air filter or not need it?If you have a lead foot, you will see a difference in the economy map merely due to the later onset of boost and the lower peak boost setting.
However, as you can see from the above posts, if you can train yourself to "shortshift" and keep the throttle peddle near the upright position, you can do the same thing without using the map. Plus, you will still have the power when you need it.
I tried the map, but immediatel switched back to stage 2 as the car felt like it had no power at all. Why buy this car if that is your intent? Map switching is fine and all that, but you still have to stop to do it.