I would imagine u could do some moddi g and just get a 379 size brushless motor and an ESC and mount it on there. U would need a RX/tx bcuz stock its an ESC/receiver combo.
Btw I didnt even know there was an 1/18 volcano. It looms awesome and pretty fast. I think I'll get one for my daughter.
I wonder if there's a 1/18 tornado!?