Hitting the 1g is less important, to me, than holding it and gradually giving it up as you accelerate. As turns tighten, see if you find a dead pedal in the P90D, coming out. On the accelerometer, my guess is that if you see 1g, it will be before the apex. Afterward, see if you feel a jolt of acceleration when the steering wheel finally gets back within ~10 degrees of dead-center. Try keeping your foot down/steady, as this point in the steering wheel arrives. Didja feel it come back on?
If the road is cambered/banked, your "1g" reading will be polluted by down force. It should be flat.