I have my full tune in map 1 and my rev limiter in map 2.
1.put the car into gear and set it in map 2.
2.set the car into map 1 but dont let go of the down button.
3. full throttle and pop the clutch.
4.wait 1 sec before car bogs and let go of the button.
5.enjoy your car gripping and launching like a bat out of hell.