Well let's see. If you put a 221 hp motor in your golf cart, you will be giving it 35 more hp than the Ducati 1199 Superleggera Superbike which is quite comfortable running with a McLaren P1, Porsche 918 Spyder...etc (see link below). Of course the Tesla motor has loads more torque which should easily overcome the extra 400 lbs of weight. I think with a well placed bunker your contraption could be airborne the entire length of the 9th at Sawgrass... http://www.youtube.com/watch?v=bfLqa4vlmFI Notice, the P1 "only" managed 3.2 seconds to 60
I don't have an answer but I like the way you think, I'll be following this thread to see if anyone decides to give this a try )
I have an electric xrt800 utility vehicle that I use around our property. There looks to be almost enough room for a Tesla electric motor, although it would probably mean raising the flat bed (or removing it entirely). The primary issue would probably be the actual power source; there's no way to fit a Tesla battery pack and my XRT batteries output only 48v. Oh, one other problem: the xrt curb weight without batteries is ~1,000lbs IIRC so fitting a Tesla motor with a suitable power supply would be a pretty wild ride (assuming you didn't become a candidate for the Darwin Awards).
How many volts does the motor run on? Why does this remind me of the JATO rocket on the Pontiac in Arizona (or Mythbusters)?