48 replies to this topic

[minimole]

i never tried this myself. but i remember reading on one forum that one was doing like 60 cut the ignition and then started it up again that caused like a 6ft flame. personally though i wouldnt try this for fear of damaging the engine and the fact that you can loose a lot of the cars functions with the ignition off (like steering ) even if it is only a few seconds.

[Jammy]

Well most of that was rubbish. I highly doubt the ability to make a 6ft flame by turning your engine off and on while moving, yes it will cause a lot of unburnt fuel to be pushed straight through the engine and into the exhuast, but a 6ft flame? No!

And you loose the steering when turning the engine off?? Only with power steering! Which most minis never had anyway! You don't loose any of these functions with the engine off, even if you have a brake servo. You only loose the aid of the servo, so you can still turn the wheels and brake, only you'll need more effort than before.

And if your the type of person who likes to see flames sprout from your exhuast for the fun of it, then your the type of person that should be asking mummy to go put the matches somewhere you can't reach them!

[The Matt]

I would suggest that a safer method to get flames coming from your exhaust is this:


Go to local takeaway,
Order Vindaloo,
Wait for 2 hours,
Hold lighter near to rectum and wait for the anti lag system to kick in!

That would be a whole lot safer and would also not risk damaging a perfectly good mini (unless you were sat in it at the time)!!!!

[minimole]

Well most of that was rubbish. I highly doubt the ability to make a 6ft flame by turning your engine off and on while moving, yes it will cause a lot of unburnt fuel to be pushed straight through the engine and into the exhuast, but a 6ft flame? No!

And you loose the steering when turning the engine off?? Only with power steering! Which most minis never had anyway! You don't loose any of these functions with the engine off, even if you have a brake servo. You only loose the aid of the servo, so you can still turn the wheels and brake, only you'll need more effort than before.

And if your the type of person who likes to see flames sprout from your exhuast for the fun of it, then your the type of person that should be asking mummy to go put the matches somewhere you can't reach them!

firstly i said i wouldnt try this. secondly i said you can loose a lot of a cars functions not you will. thirdly i also said i wouldnt do this. i myself dont have a servo as i think they are a waste of time (for me anyways) i would prefer the extra space in the engine bay. I was only saying what i had read on a forum (i forget which one it may have been on here ). i am not here to argue. but it seems to me that you are at every opportunity. this is all i am going to say as i will not waste anymore bandwidth with petty arguments

[Jammy]

I'm not arguing. I'm just making sure people know the correct facts.

You can't loose brakes and steering just from turning off the engine on a mini. Its not even a maybe.

[kada1980]

We used to have some V8 landrovers at work and they were pretty easy to backfire. Rev the engine pretty hard then kill the ignition, place right foot to the floor and just before the engine dies turn the ignition back on. Yes i know it was childish, irresponsible and dam right stupid but it did make me smile.

(oh and by the way i did get a pretty serious telling off by the RAF police sergent, he did find the funny side of me back firing the landy as i drove past the main gate and make my mate C**p him self whilst on guard duty.)

[Bungle]

You can't loose brakes and steering just from turning off the engine on a mini. Its not even a maybe.

you can if you turn the key to far and the stearing lock comes on

[Turbo Nick]

swap the leads round for cylinders 2&3, make a hole in your manifold gasket, retard the f**k out of the ignition......all ways to make it pop and fart, all ways to make it run like a bag of *******

[Brett]

to get flames its simple
have the mini run rich at idle, take it for a nice foot to floor every-where drive for about 5 minutes(to get the exhust nice and warm), then every time you hit over-run you get some after-fires(like back fires only quieter) with the advantage of big flames
by the way works soooooo much better if you loosen your front c-clamp on you lcb system


ok also try this remove your vacuum advance pipe it will idle like sh!te but the flames will be BIG

[Clubby1275GT]

my mate had a fiat uno turbo, but the turbo lump was taken out and replaced with a 1.3 na, that used to *yellow human water* flames out, it was quite modified though, and it licked them up the boot when u used to do the engine off engine on trick, great for scaring people in tunnels or on streets, if u like that sort of thing!
oh and the steering lock wont come on as the keys will still be in the ignition!

maybe thats because i ent got a steering lock, well it never works anyhow!

[foster]

You can always put a rev limiter on and if you keep your foot to the floor on the limiter the unused fuel gets burnt in the exhaust giving the flames you want.

Personaly i would build a high performance engine and it will probably do it anyway and lets face it, its a bit sad pretending to have a fast car??

[Oldskoolbaby]

My Thirty used to back fire pretty badly.......or well depending on how you look at it . It was all set up on the rollers aswell so it wasnt that it was running badly. It did have a pretty spicky cam and hich c/r though which I think helps them pop out the back. It only really ever done it around 2500 to 3500rpm though. Ive got a recording of it but Im not sure whether I can put it up on the forum as its not a picture.

[robpeacey]

Just brousing the forum and came across this thread. Dear dear how some of you are dis-illusioned!! (Cand believe i registered just to reply!! Ah well, boredom for you!!)

Right to quell a few arguments............

DONT put the return hose to the exhaust unless you want a fireball as a car! the pressure regulator 'regulates' the pressure going to the carb. the fuel pump supplies a pressure and flowgreater than needed so therefore there is always fuel returning through the line, not good at all if routed to the exhaust!!

Flames from turbocharged rally cars......

this is created by the Anti Lag System. this works by changing the ignition timing during let off. when the throttle is closed the timing is retarded greatly so that the sparc occours when the exhaust valve is open, thus the ignition stroke of the engine happens in the exhaust manifold. the expansion of the gasses spin up the turbo so as to reduce the lag. Simple if you know how!! Dont try this at home boys and girls. this 'explosion' in the exhaust manifold can blow it to bits if it is not up to the job!!

Just on a seperate note, the dump valves mentioned are to reduce lag also. the expell the pressurised air between the butterfly ant the compressor side of the turbo to stop the pressure wave from traveling back up the intake and stalling the spindle.

As for flames fron N/A cars. (race and highly tuned) this is due to the high overlaps in cam timing. at lower rpms there is sufficiewnt time for a fair bit of intake charge to flow into the chamber and then back out through the exhaust. when this un-burnt charge comes into contact with, usually if you have tried hard enough, a cherry red exhaust it will ignite and flow down the exhaust til it reaches the end. Exit one flame!

As for some peoples explanations of getting flames and 'pops' from the engine, ooh deary me, i really do feel sorry for your engines!! not healthy suggestions at all!!


Bit af a ramble there!! End of Lecture!

[16v]

Just brousing the forum and came across this thread. Dear dear how some of you are dis-illusioned!! (Cand believe i registered just to reply!! Ah well, boredom for you!!)

Right to quell a few arguments............

DONT put the return hose to the exhaust unless you want a fireball as a car! the pressure regulator 'regulates' the pressure going to the carb. the fuel pump supplies a pressure and flowgreater than needed so therefore there is always fuel returning through the line, not good at all if routed to the exhaust!!

Flames from turbocharged rally cars......

this is created by the Anti Lag System. this works by changing the ignition timing during let off. when the throttle is closed the timing is retarded greatly so that the sparc occours when the exhaust valve is open, thus the ignition stroke of the engine happens in the exhaust manifold. the expansion of the gasses spin up the turbo so as to reduce the lag. Simple if you know how!! Dont try this at home boys and girls. this 'explosion' in the exhaust manifold can blow it to bits if it is not up to the job!!

Just on a seperate note, the dump valves mentioned are to reduce lag also. the expell the pressurised air between the butterfly ant the compressor side of the turbo to stop the pressure wave from traveling back up the intake and stalling the spindle.

As for flames fron N/A cars. (race and highly tuned) this is due to the high overlaps in cam timing. at lower rpms there is sufficiewnt time for a fair bit of intake charge to flow into the chamber and then back out through the exhaust. when this un-burnt charge comes into contact with, usually if you have tried hard enough, a cherry red exhaust it will ignite and flow down the exhaust til it reaches the end. Exit one flame!

As for some peoples explanations of getting flames and 'pops' from the engine, ooh deary me, i really do feel sorry for your engines!! not healthy suggestions at all!!


Bit af a ramble there!! End of Lecture!

Have to agree with what has been said above. However, to the guy with the 200SX, please do prey tell how the hell compressed air produced by the turbo charger, would release though the side of the turbocharger that draws it in. Is there a magic door that only 200 SX owners know about that a bar of boost can make a quick exit from? What you would of heard is commonly referred to as waste gate chatter (although it actually isn't, that just the "cool" way to describe it!!) becuase you had removed the standard relief valve. When you release the throttle after being on boost, where does the built pressure go? nowhere, it stalls the turbocharger which is your "waste gate chatter" You hear it though the filter becuase you are stalling both sides of the compressor, there is no air escaping as such!! However, I have seen it first hand on a calibra where some really clever person tried this, and it actually snapped the turbine wheel shaft.

As for the dump valves.. depending on management, some cars do not like the classic diaphragm style of dump valve (bosch motronic 2.8 a prime example, calibra/cavalier turbo) and yes the airflow meter is one of the factors, but not the only factor, but as a rule of thumb, a normal bailey or similar piston dumpvalve does absolutely no harm at all, let alone mess around with the airflow meter as described.

carry on.....

I think that is one of the reasons Fuel injected cars anyway have dump valvs fitted as standard as with out it u run a chance of running too rich and failing MOT's and emissions........ or so i was led to believe.

Dan

sorry, but to sprout something like that you must have been dropped on your head at birth.. do you mean to imply if a vehicle is fuel injected, it has a dumpvalve?

does that mean my diesel cement mixer has one?

[The Matt]

...............does that mean my diesel cement mixer has one?

LMAO!!!! That would be cool, four of sand, one of cement, wop wop hisss!!!!!