Comments on: Exhaust flame throwers

By: Lokivoid

Lokivoid — Mon, 18 Oct 2010 16:36:01 +0000

EFI or carb, ether way the best way to do this safely is a cheap micro electric fuel pump and a dry NOS sprayer mounted after the Cat. Bypassing the relaying the ignition and intentionaly causeing a misfire is vary hard on a engine. With the pump you can make it veriable in the amount of fuel injected into the line giving direct controll over the exhaust flames without screwing with your ECU or carb mixture or fouling up your pistons. Just drive the Coils with a 555, hell even a heavy duty relay setup to act as a buzz coil. If you want it alittle bit more complex use a MCU to monitor the transmission tach and time the fuel pump to pulse just befor the exhaust cycle release, ensureing little to no fuel is pulled by backpressure. As for propane, no that just screams rice right they always end up looking more like a blowtorch then a hotrod exhaust.

By: Jeremiah

Jeremiah — Sat, 16 Oct 2010 07:18:17 +0000

the easiest best way to do a flame thrower cheapest way works great with anything with points distributor,put 1 sparkglug in each exaushst bout a foot in,take a heavy wire, place it in 1 of the spark plug bongs in cap,run that to a toggle switch in dash from there run that other wire off switch to both spark plugs when u want flames let rev it few times,let off gas,hit the switch watch the flame richer carb is better flames, this is the actual 50s way.

By: Ed Taylor

Ed Taylor — Tue, 12 Oct 2010 18:16:59 +0000

If you’re ever annoyed by people leaning against your ride try this; drop a trailing wire from one of the exhaust spark plugs to the ground. When someone leans against the car flip the switch momentarily and they will get a jolt.

By: chris

chris — Tue, 17 Aug 2010 13:49:40 +0000

opps did not mention it will be an injected set up

By: chris

chris — Tue, 17 Aug 2010 13:48:08 +0000

My engine coil recives a pulse from an electronic ignition. Would i be able to tap off that line for an aditional pulse to fire a 2nd coil? thanks chris

By: Ed Taylor

Ed Taylor — Tue, 20 Jul 2010 16:55:40 +0000

Here is a link for a driver circuit that might work. I would suggest some protection for the 2N3055, maybe diode to prevent transistor punch-through by back voltage when coil fires.

http://www.eleccircuit.com/ignition-coil-driver-by-ic-555-2n3055/

By: Ed Taylor

Ed Taylor — Tue, 20 Jul 2010 14:51:07 +0000

I am not sure what part the relay plays in the circuit. The base/emitter current to turn on the transistor is low as the main current flows through the emitter/collector circuit.

The T-Model coil approach, which could easily be imitated with transistors, gives a continuous spark as long as the switch is closed so plug wetting or fouling become less of an issue.

Does the illustrated circuit give one spark for one push of the momentary contact switch, or am I missing something?

By: scott

scott — Sat, 17 Jul 2010 18:20:19 +0000

hey yall. i’ve been wanting to hook a flamethrower in my car for a while now and i thought i had everything i needed. I got a small gas tank, fuel pump, nos nozzle, spark plug, coil, and switches. the plug fires when i press the momentary switch, but when i try to add the fuel injection it doesn’t work. I think its because the plug becomes covered in the gasoline i am spraying, and the air fuel ratio for combustion is off. any ideas? maybe a pump with less gph or higher psi?

By: Ed Taylor

Ed Taylor — Sun, 30 May 2010 11:41:33 +0000

There is a Model T coil on ebay now “vintage spark coil for Model T car” doesn’t say if it’s operable but has a picture.

By: Ed Taylor

Ed Taylor — Sun, 30 May 2010 11:38:00 +0000

I did it in the 50′s using a Model T spark coil. It delivers a continuous spark. Basically it has a set of points that vibrate like a buzzer.

To do the same thing with a normal ignition coil have an electronic hobbyist build a solid state multivibrator to power the coil. the transistors have to have enough front to back ratio to stand the back voltage from the coil. Or look for a Model T coil in an antique shop.

By: Philip Pait

Philip Pait — Sun, 18 Apr 2010 22:35:36 +0000

Awesome posts, have you seen Mayhem Millers latest debaucheries in the Strikeforce brawl that broke out last night?

By: Cameron Grabowsky

Cameron Grabowsky — Sun, 18 Apr 2010 20:36:34 +0000

Fantastic posts

By: slipsonic

slipsonic — Fri, 16 Apr 2010 18:22:22 +0000

yeah igniting the fuel from all of the cylinders in the pipes at once doesnt sound like a good idea, I did however do the same thing with a switch for cutting the spark as more of an anti theft device, i have a hidden switch that cuts the power to the coil so that if someone were to bust the ignition, hotwire it etc. they could turn it over all they want and it wont start :) and as for the flames, it would work just to have plugs in the pipes and rev it up and let off it should ignite cuz the exhaust is always a little richer revving down, right?

By: Tom

Tom — Tue, 10 Feb 2009 00:59:44 +0000

Idea is right, circuit description has some mistakes though. This circuit could be improved upon a little bit. A rubber grommet is a MUST when running wires through a metal chassis. This mod as built does not interrupt the spark from the engine therefore the only fuel in the exhaust is what did not burn during combustion. If you wanted to interrupt the engine spark its easy with an MSD AL6, or AL6-2 select a low value for the 2step rev limit hit the rev limit swtic and rev the engine and it will randomly drop the spark from 1 cyl. The same cyl will never be dropped twice in row to prevent the washing of oil from the cyl walls. “raw unburnt fuel” (Sounds scary dont it?) is in you engine for 2 out of the 4 cycles anyway…

Oh and to the guy who put a switch to the ignition coil and the battery, and rigged another switch to cut all the spark plugs. If your still alive… There is an infinite to list the reasons why you should put this project down.

By: James Manning

James Manning — Thu, 01 May 2008 14:32:34 +0000

Hey, just hooked up an ignition coil and bolted it under my boot, connected that 2 the battery and earthd it, connected it to a spark plug in the exhaust tip and a switch in the dash. that works sweet. also put it switch in the dash which turns off all spark plugs in the engine, which should mean id pump raw fuel through my exhaust? spent a lot of time on this but cant seem to get any flames :S please help?