GF Chips
Le Mans Master
Joined: Feb 2007
Posts: 8,514
Likes: 235
From: Currently somewhere in IL,IN,KY,TN,MO,AR,MS,AL, or FL
Jack Nicholson had a line in Five Easy Pieces 
Actually these "theoretically" modify the inputs to the ECM to change the "fuel, ignition, throttle position, intake temperature, along with a few other variables" to simulate a real tune. In fact they have been shown to not even do that.
Actually these "theoretically" modify the inputs to the ECM to change the "fuel, ignition, throttle position, intake temperature, along with a few other variables" to simulate a real tune. In fact they have been shown to not even do that.
