no. ive said this multiple times. there are 3-4 different realtime maps for the ecu to pull from at any given time. it takes the info from the IAT and MAF sensors and choses the right realtime map to run. you dont run injectors past 85% duty cycle and you tune the basemap properly and you only need one tune. anyone that has to go back for retunes depending on weather isnt getting a good tune to begin with.