[wmhjr]

My guess? Non-sumped tank and losing fuel pressure when you add lateral force. What were your fuel levels when this happened? Stock pickup and sending unit?

The one constant you have every time this starts is that the car is in a relatively heavy G turn. So what changes in that situation? Fuel displaced to the outside on a flat tank with stock pickups. Pump starts getting air as the fuel moves away from the pickup. Initially there's enough in the bowls to run the motor, but under heavy throttle that will burn quick. Keep on the throttle and even after the pump stops cavitating, it can't catch up initially. Slow down in the straight, backing off the throttle allows the pump to get some fuel back in those bowls.

Somebody else could have a completely different opinion.