I just found a site with a 1/8 truck with a .18 motor and they say that it's the biggest motor out there! I think I could get my cen to back fire one of those out!

and I quote...
"LARGEST SIZE OF ENGINE FOR 1:8 OFF ROAD VEHICLE! This is a 1:8 scale unstoppable nitro power vehicle."

LMMFAO they must not get out much.