Flamer Kits - cue the haters! :P

[binge]

Am I missing something here?
I can't get mine to work.


Haterz Gonna Hate and all that bollocks.
But I gathered on something like the Chaly, I could get away with a flamer kit, without being a complete cvnt.



So, my trail of thought.

Spark plug, tapped into tail pipe.
HT Lead from spark plug, to a small ignition coil under the seat.
Ignition coil earthed as normal, to the chassis.
Coil lived up, with a switch.
The same switch that lives up said coil, also cuts the actual engine, ignition coil.


At this point, it should be hey presto, flames on over-run.
As the engine is not running, yet it's on over-run as the bikes rolling along.

Got a second spark plug, giving it balls out in the tail pipe.



But me get no flamey.

I have checked, and yes it's defo sparking away.
It's obviously sparking away at the RPM of the engine.
Are these 'black box of tricks' Flamer kits different?
They usually have a 555 timer in them, what sort of rate do they flash at?
Or could it just be that Chaly is only a single cylinder, and even on over run, with W-O-T, it still doesn't throw enough fuel through to light?


Ideas, and slatings, please.

https://scontent-lhr3-1.xx.fbcdn.net/v/t1.0-9/13699953_309235892760776_5214808633962916814_n.jpg?oh=8d537e18953233d93f279a6adf390446&oe=57F1C56A

[Ste]

inb4 you explode yourself

[ZX-7R]

[spottedtango]

Are you running a rich mixture, can you adjust the fuel/air ratio?

Make it rich and stand back a bit

[stevo as b4]

I think getting fuel to ignite in the relatively cool exhaust near the tail pipe is going to take quite a bit of doing on many engines, especially if they are not in a high state of tune or are not having loads of excess air rammed into the cylinders all the time.

My hunch is that too rich or too lean fueling is going to make it hard/impossible to ignite the gases at the end of the tailpipe, the same as too much or too little petrol makes lighting a stable fire hard too.

Does throttle open/closed make any difference to getting a flame going? I wonder if introducing more air into the exhaust header pipe would help get the right fuel air mix for sustainable burn maybe?

[Evil Hans]

*cue* the haters
____________________
Triumph Sprint ST 1050. And it's Red.

[ScaredyCat]

[G]

I thought they often had a pipe to dump extra fuel into the exhaust?

Can you turn the main spark plug off with out affecting your extra one?
(Then test it down a hill with WOT.)
Normally produces good backfires with the kill switch in such a situation, though you get the chance to get a good bit of fuel through.

[Pjay]

Maybe the answer is as simple as fuel/air mixture.
You may need to move the spark plug closer to the end of the pipe so as to get some air to help with ignition, as too much exhaust gas and no air will never spark. Try putting the spark plug down the exhaust at ever increasing depths, until you get a spark. That way you can tell where it needs to be installed.

[Fin]

My SR would shoot a flame out all the time after turning off the engine, this was because the cold air could enter the exhaust and mix with the other gasses. Pretty sure the bike ran a little lean though because the exhaust was always so hot.

[BTTD]

I didn't even know this was a thing.

Triumph 955's do the pops, bangs and flames in part due to the secondary air injection, ie clean air is allowed into the exhaust when the throttle is closed to burn off excess fuel and reduce emissions. Is there anyway you can introduce air? If the end can is a little loose maybe?

[Ariel Badger]

Where are you getting oxygen from? You can pump as much fuel past a spark plug but it will not light unless conditions are right. I am trying to cure an air leak on my exhaust that pulls air and causes bangs and flames so maybe you need to drill a hole or two.
____________________
Bikers make great organ donors, get 115 on your licence today.

[binge]

Tried all of the above.
Sparky still no workey
I've given up. Haha.
Instead, I've bought a YX140 engine to tune the balls out of and stick in the thing instead of the 120 thump engine.

[Pjay]

You need to dump fuel into the exhaust, the best way is to rev high and then drop the throttle off fast. Otherwise you'll just be sending exhaust gas only, which is not flammable.

[Hong Kong Phooey]

An external combustion engine, how novel.

Are you trying it rolling at different speeds, e.g. much faster?
If so you need more holyness in your exhaust or try with end can off first. If you can retard the ignition enough you wouldn't need the kit.
____________________
'81 CG125, '97 FZS600 : '99 CBR600F4, '09 KTM RC8

[binge]

I tried it with throttle open, throttle closed, pumping throttle while holding button, etc etc.

It'l back-fire, pop and bang on normal over-run anyway. Just fancied being able to project a 30cm flame out the back for more than a split second.
Party trick for the little pink machine I guess.


Ah well. I guess having 18bhp will be more fun.

[dydey90]

I would imagine that getting the stoichiometric ratio right would be very difficult. For better results, get a small cylinder of hydrogen activated by a solenoid valve to inject into the exhaust. Hydrogen has a superior combustion range to petrol. Hope this helps.
____________________
This post is probably not serious and shouldn't be taken literally.
Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750

[colink98]

Where are the flames ?
i was expecting flames.
____________________
PCX125 (stolen) - CBF600 (current)
Ride it like you stole it.
ride sensible and not like an idiot and you wont get 6 points in one week.

[orac]

bottle of camping gas and electrically controlled valve - job jobbed
____________________
Current rides - 2016 Triumph Street Triple Rx, 1994 Suzuki Bandit 400 VM, TGB 204 Classic 125cc
"with nothing left to lose, there is everything to gain. It's not the size of the dog in the fight, it's the size of the fight in the dog"

[sickpup]

[Andy_Pagin]