Floyd Mayweather's spending spree didn't stop at Art Basel in Miami ... we're told the boxing legend just dropped $330K on an insane 2022 Porsche 911 Turbo S!
TMZ Sports has learned Floyd hit up his longtime car guy Obi Okeke -- aka "Doctor Bugatti" -- telling him he needed a car to get around while in town ... and the Dr. delivered!
Okeke tells us Floyd wired him the money while the two were on the phone .