That's why you want Nistune ,,, the "Generic Tunes" just get you into the ball park. A image comes on the daughterboard and you can tune on the fly or if you have a chip that's close to what you want in maps you can syn the laptop to the ecu and upload it. And the "BiG Difference" is when youu've made your tune save the image burn it to a eprom and then you can remove the daughterboard and use it on your friends Z. Injector size can be changed faster than I typed this response
