More than likely you will need to reinforce your powerwheels car frame to support the weight of batteries, motor/motors, and a grown adult driver.

Lot of imaginative options are out there, but most common is to weld up a steel frame. Some people use old bed frames, some use square tube…

Useful conversations pilfered from Facebook posts

*Failed Weld - possible bad weld wire (filler metal) or low amperage