I am thinking about re-building centrifuge and I thought that at the champs the bar lacked any real power or speed. I was thinking I would increase the weight of the bar ( if possible around the outside) and then changing the motor. But I wasn't sure what motor would be best out of:
Real speed 900
2 replica speed 900s
1 or depending on weight 2 car fan motors
A electric scooter motor
Or if anyone knows of any other motors which are quite cheap but powerful?

Also does anyone know the weight of a car fan motor?