Take a wooden boat designed to carry rice along the Thai waterways – then customise it with engines cannibalised from motorbikes, cars or jet skis. The result? A boat that hurtles along at 90mph, piloted by madcap racers with no helmets, safety harnesses or fear. Welcome to the world of Thailand's long-tail racing. Elvis develops a plan to build a race-winner using his F1 know-how – reducing friction along the water the same way racing cars reduce drag – and uses F1 techniques to give the engine a bit more grunt. The boat will compete at one of Thailand's biggest annual events. Will it win, or will this be a sinking ship?