Out of curiosity, how accurate are the G-Force readings on the AVIC units. It's basically giving me a reading that should be near impossible in my car with my setup.

it should be very accurate unless the is a problem with your internal gyro's, since this thing need to rely on that info to keep you on track when no sat reception is availible. this is of course only as long as the unit is mounted securly and with in the specified mounting angles