I've raced two cars that were able to put flames out the back exhaust and they weren't running no switch. They just had straight back pipes, and running real rich. One was a older Ferrari, it was extreamly sweet looking. The other was this guys Prelude, he was running like 20 pounds + boost. He owns a performance shop, and has like $20,000 into his engine. You'd see him at high rpms fire shoot out. It was cool to watch him pull with fire coming out of his exhaust. =) When we got back he reved his engine and it was shooting back like 1-2 feet of flames out. I wonder if those cars will pass emisions?
§am.