Before you start the car press and hold ok on your steering wheel to get it into engineering test mode or something like that. I don't quite remember what you adjust but somewhere on the forums here there is a thread on all the specifics.
Shortly after installing my whipple I drove two hours or so on the interstate at 90+ and my on dash reading was around 23. My computer at that time would read around 2 mpg less than what I hand calculated.
I've since calibrated it and got it to read half a mpg lower than what it actually is...
I felt the same way when I first put my whipple on. I was all like "holy crap this is insane!" As I'd giggle to myself. Now I'm all like "Is this thing broken? Feels so slow! Needs more boost." As im quickly exceeding the speed limit into go to jail speeds :-D never thought I'd say a nearly...
The 3.7 is a great motor. Makes good power and reliable. I however would never own one. They sound terrible and they lack the power i desire. With one mod my 5.0 will roast 1st, 2nd, and 3rd and if I don't drive my car like a dip shit I can easily get 24mpg maybe even more (averaging 18ish over...