The point is that very few ac have sufficient thrust to be able to maintain the bufet nibble in level flight at their max permitted g. The only thing I've flown which would was the Hunter GT6 - full power, buffet nibble and +6 g at low level and it would actually climb....
So in a light puddlejumper, if you can maintain the buffet nibble at 70 deg AoB and full power you'll be doing +3.9 g. To get any further increase in rate of turn, allow a slight descent to start and then increase AOB and back pressure until you're at the limiting g value on the buffet nibble with full power. Do NOT try this without a g meter AND dual instruction!
...NEVER 'whack off the power'! Throttle back gently instead.