Hate to go so off topic, but that's how those JDM flamethrowers work, they adjust the injector pulsewidth to the point that you literally do have fuel at the tailpipe and then use an ignitor to light it and WHOOOOOOSSSSSHHHHH! a 10 foot flame. A little risky for me, but looks cool. I'd like to pull in front of a Mustang and give him a taste of that flame (only in my fantasies), I think that's why they are illegal.