Originally Posted by msile
I am assuming that the Scaler is a MAF based ECU to be used without a MAF sensor by generating a simulated MAF voltage based on inputs from RPM, MAP and TPS...if so, do you not need a piggy back ECU in conjunction with the stock ECU?
Yes you would, the stock ecu would control all other functions, the piggy back would control the fuel and timing tables... Question is whos sell a piggy back system? Form what I have been told and read the BMW software cannot be adjusted like how everyone in the world does.. I am about to give up on this car as far as tunning it, and leave it as it is..