Video: London Tourist Pro Tip – Don’t stand behind high revving modified cars in the street, the unburnt fuel that has been dumped into the exhaust system will spit flames!
The easiest way to get your flamethrower on is to get rid of your catalytic converter and fit a straight-through exhaust. The next step is to make sure you’re dumping a lot of fuel into the exhaust. Accelerate hard with a wide open throttle, then slide your foot off the accelerator to quickly snap the throttle shut. All that fuel and air that had been dumped into the combustion chamber is now not needed for propulsion so doesn’t get lit, and instead gets spat into the exhaust where it will ignite on the hot pipes. Voila: Fire!