thing as say an s-afc II or the like? Which is to modify the A/F ratio in a basic sence and allow for tuning of the ECU's parameters. In the dyno plots, looking at the lines, are the lines that drop of as load increases the stock ECU baseline and the lines that increase those with the emulator controlling the commands? I'm trying to get a grip on all this new found (to me) info on tuning the Z.