DKMLY

I drive a 88 turbo and finally after months and months of trying, figured out how to make flames shoot out of the exhaust. I just rev it up high and keep a little bit of throttle. Anways. Is this bad for the engine? How exactly does the flames work? My dad said it's caused by detonation which is bad for the egine. Does the fuelt leave unburned or does some of the unburned stay inside the chambers and still ignites inside the engine? I love the idea of shooting flames, but not wrecking the engine or turbo... One more thing. I have downpipe, resonator and stock mufflers, will I shoot flames with aftermarket straight through mufflers with the resonator in the setup? Right now I just hear massive afterburn coming from the mufflers

bingoboy

unburnt fuel burns in the exhaust system causing flames. its an extreme backfire, not detonation. i think to see anything youre gonna need no cats and a straight through muffler.

Kahren

iTrader: (13)

your exhaust has to to get very hot in order to shoot flames, if you are gonna sit there and rev the engien to redline your oil temp will rise above normal operating temperatures very fast since there is no air goign to the oil cooler to cool it down, if you continue to do so u can damage the engine. either get an oil temp gauge or do not do this. opereration of engine above about 210f and u can mess it up this is oil temp not water temp.

flames is the extra fuel that didnt burn in the combustion chamber that burns in the exhaust because of exhaust gasses being so hot its able to ignite that extra fuel.

ERAUMAZDA

Why don't people just put a damn ignitor on their muff.

V8s_are_slow

i've heard of people here in town doing this.....but it was on V-8's. now my question is, when there's flames out the exhaust, does it SOUND like a backfire? or is it just flames and someone happens to notice it and that's how you know about the flames? about 10 years ago i drove a guys 1st gen rx and it would backfire every now and then. but now that i think of it, was it flames? or just a backfire?

and if i did put on some sort of ignitor to light up that unburned fuel when i wanted it (at night here on the strip during spring break with zillions of people around in panama city, fl. just to make it look cool with the dual exhaust) would that hurt anything? just wondering since it's happening when i want it to. not because of a hot exhaust.

NZConvertible

You need three things to make fire: fuel, heat and oxygen. If unburnt fuel is pumped into the exhaust because the mixture is rich, it won't burn because there's no oygen left in the exhaust gases. However if the exhaust pipe is hot enough to keep the fuel in the exhaust gas above its ignition temp, as soon as it hits the oxygen in the air at the exhaust tip, it explodes, causing flames. You need to get the exhaust pipes hot enough (by hard driving) if you want flames.

Jimmy325i

Before I did my rebuild I could shoot flames on demand cold or hot. I have a video of me getting into my stone cold car, starting it, and proceeding to shoot 4' flames clear off the edge of the screen.

I think a more plausible explanation is that there needs to be too much fuel to be burned by the oxygen present in the exhaust, yet flame traveling through the exhaust to ignite it when it is presented with more oxygen to burn it off.

Now that I ported my motor I can't seem to shoot flames for ****. Too much air I guess. I've managed some little 12-18" popers, but nothing like the fireballs I did before.

DKMLY

I'm planning on keeping my resonator, would the resonator affect the flames?

xfeastonarsex

iTrader: (5)

Flames are cool Jimmy where can one find these movies, im trying to prove to someone here at work this can be done.

V8s_are_slow

Jimmy325i

I have it on mini digital video and vhs. This spring I might be able to get it uploaded to the net. I'm taking a class on video editing this term so I'll have access to the Avid's. (digital editors)

xfeastonarsex

iTrader: (5)

I was being sarcastic if you didnt pick up on it...

V8s_are_slow

oh, my bad. i was being serious (not the stupid part though). i think flames would look cool personally. sorry.....

but anyway, wonder what would need to be done to make some sorta ignitor. i mean, i've heard of people doing it, but don't know what would be used. i'd like to do it so long as it's not gonna harm my car in any way, shape, or form. anyone have any ideas how to do it? best placement maybe? i'm gonna be ordering my apexi duals tomorrow....but wouldn't wanna mess it up though. whatever would be used would have to be hidden from site of course. i'd think that near the tip would be the best place for to ignite it, but i think it would make it harder to conceal anything that's gonna ignite it if it's near the tip. any ideas?
scott

Jimmy325i

run some small weed wacker spark plugs off a tach lead to a coil pack. the tach signal would fire the coil much like the ignition box does yet requires little extra equipment.