Come and race the local forum members - you're guaranteed to have One Hell of A Day Out.
We did this a couple of years ago and had a ball. You don't race all in one hit, it's spread over a couple of hours. You can recover after each session and brag about your run!

Carts go up to 80kmh pretty quick, with your bum closer than the height of your lift blocks to the ground

It will cost $115 for 6 x 10 minute sessions + $5.50 membership.
Please leave a post if you're interested. There is nothing in concrete yet at least 3-4 months away so start saving.
Jan