How many G's can I pull
Yes, if the speed doesn't decrease in a level turn, the maximum G loading is the maximum Cl of the wing divided by the Cl in level flight at maximum speed. For a pylon racer the Cl in level flight is usually much less than 0.1 and the induced drag coefficient is usually much less than 0.0001.
The Hysterisis I'm familiar with occurs after the wing stalls.