the post gives a good idea of what to expect when getting your car tuned. i know me and MTBER may disagree on one point but i firmly believe before you hit the dyno you should get your car street tuned . it will give you best feul economy and driveablity. driving on a basemap may work but if you drive w/ a wideband and see how rich and lean you run under different driving conditions you may change your mind. just my $.02 but nice post.