 Flaming exhaust
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Joined: Feb 2007
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My grandfather used to talk about putting a spark plug in the exhaust of old hot rods to make the "flame-thrower" effect. I never really considered doing anything like that but the topic makes me curious. Would that hurt an engine? Isn't there a chance it would ignite everything in the pipe going right back into the engine? The idea sound like a cool novelty but also a little dangerous. I think it would look cool on my "off road use ony (wink wink) america" but not if it's at the expense of my ride. Any thoughts? 
Nick Derry
"Whoever dies with the most toys, wins"!
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Re: Flaming exhaust
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Joined: Aug 2005
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They used to do it "way back when" when gas was 10 cents a gallon. Really only works when the motor was running REALLY lean and left a lot of unburned fuel passing through the exhaust. Internal combustion vehicles that can actually burn the exhaust gasses like that are SERIOUSLY inefficient. If you can actually ignite your exhaust, you are really wasting a LOT of power.
Last edited by 03Cruiser; 05/14/2007 12:20 AM.
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Re: Flaming exhaust
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Joined: Feb 2007
Posts: 109
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By lean, did you really mean rich?
Nick Derry
"Whoever dies with the most toys, wins"!
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Re: Flaming exhaust
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Joined: Feb 2007
Posts: 23,219 Likes: 61
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,219 Likes: 61 |
yes rich is the condition that would allow that and at the same time crud up the combustion chamber and possibly wash the lubrication off the cylander walls. Greatly decreasing the life of your engine. I have heard of it being done. I have never personally seen it except in a movie.
Could be done with a small tank of propane with no damage if a nozzle was put into the exhaust before the end maybe.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Flaming exhaust
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Joined: Jan 2005
Posts: 6,821
Bar Shake
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Bar Shake
Joined: Jan 2005
Posts: 6,821 |
Mostly back in the day of manual chokes. Pulling the choke on a warm engine and firing the plugs in the exhaust would make a flaming effect as the raw fuel was burned. These plugs were fired using a separate coil set-up.
I wouldn't try it on a modern engine. Plugs (the ones in the engine) foul too easily and don't readily self-clean. Unlike point/condenser or magneto ignitions.
Contra todo mal, mezcal; contra todo bien, también
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Re: Flaming exhaust
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Joined: Mar 2007
Posts: 5,616
Check Pants
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Check Pants
Joined: Mar 2007
Posts: 5,616 |
Didnt Jesse James do that on one of the Monster Garage builds? Or was it was those guys that rebuild semis...hmmm
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
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Re: Flaming exhaust
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Joined: Apr 2007
Posts: 165
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My Turboed import does it when I get off the gas after a run. 
...yes, that is a single seat...no, I will not put the other seat on...yes, I am selfish...yes, you should buy your own bike
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Re: Flaming exhaust
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Joined: Jan 2005
Posts: 12,164 Likes: 1
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,164 Likes: 1 |
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Re: Flaming exhaust
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Joined: Sep 2006
Posts: 1,836 Likes: 5
Learned Hand
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Learned Hand
Joined: Sep 2006
Posts: 1,836 Likes: 5 |
Quote:
My Turboed import does it when I get off the gas after a run.
Bran flakes, tacos, re-fried beans, and beer - in equal proportions does it for me.
2004 Triumph Speedmaster (J Lo) 2006 Yamaha Stratoliner (Adele)
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