Exhaust flames
Discussion
Do monaros/LS1/LS2 ever produce flames out the exhaust when modded?
Just wondered if anyones actually does this?
http://uk.youtube.com/watch?v=Kxldsh-ZhCo
Surely flames = bad map/over fueling?
Just wondered if anyones actually does this?
http://uk.youtube.com/watch?v=Kxldsh-ZhCo
Surely flames = bad map/over fueling?
jamiep said:
Hmmm might be time to have the tune checked, seems to be expeienceing a little glazing on plug 7...a little too rich I think buddy.rear/mid mounted engines are perfect for a little flame action hey guys......but I'd never know, never had one unlike half the forum.
I love to see flames out of the exhausts. What causes it? Is it unused fuel burning? I remember being behind a Escort Cosworth on the M6 and every time he changed gears it did that
I was going a little bit mad
to be fair
I don't know what he'd done to it, but it was great
I loved watching the Holdens race at Bathurst. The flames really look awesome
I was going a little bit mad to be fair I don't know what he'd done to it, but it was great I loved watching the Holdens race at Bathurst
. The flames really look awesome^ Could be caused by fuel being dumped into the turbo to keep it spinning fast. Not good for turbo life but that's irrelevant on a race car. On an ordinary car it could be excessive camshaft overlap or extra fuelling during throttle lift off. The fuel burns in the exhaust pipe.
Then there are the afterburner kits inside the tailpipe.
Then there are the afterburner kits inside the tailpipe.
Yes it's unburnt fuel.
You can get it via a number of ways however the easiest is as said by tweaking the mapping.
Most modern cars for fuel economy and emissions shut fuel off as soon as the throttle is released - switch this off and you'll get incomplete combustion in the chambers and on hitting the hot exhaust will flames.
One thing you need to be very careful of is the other reason for shutting fuel off on the overrun - when unburnt fuel hits the cat it also combusts and can rapidly overheat the cat. At best it'll reduce it's lifespan considerably as it runs hundreds of degrees hotter. Worst case, it can overload the heat shielding and cause a fire. I know of at least one car (admitidly an aluminium / plastic Lotus) that was lost as the owner forgot to remove the car when changing to the ECU over for a track mapping.
You can get it via a number of ways however the easiest is as said by tweaking the mapping.
Most modern cars for fuel economy and emissions shut fuel off as soon as the throttle is released - switch this off and you'll get incomplete combustion in the chambers and on hitting the hot exhaust will flames.
One thing you need to be very careful of is the other reason for shutting fuel off on the overrun - when unburnt fuel hits the cat it also combusts and can rapidly overheat the cat. At best it'll reduce it's lifespan considerably as it runs hundreds of degrees hotter. Worst case, it can overload the heat shielding and cause a fire. I know of at least one car (admitidly an aluminium / plastic Lotus) that was lost as the owner forgot to remove the car when changing to the ECU over for a track mapping.
Boosted LS1 said:
^ Could be caused by fuel being dumped into the turbo to keep it spinning fast. Not good for turbo life but that's irrelevant on a race car. On an ordinary car it could be excessive camshaft overlap or extra fuelling during throttle lift off. The fuel burns in the exhaust pipe.
Then there are the afterburner kits inside the tailpipe.
Got it in one. Dumping fuel into the exhaust causes the turbo to keep spinning, hence no lag whilst changing gear. Used to be called anti-lag kits. I also followed an escort cosworth years ago with one fitted and it shot flames out and poped all over the shop, the lack of lag was noticable mind so they obviously worked. My old Sierra Cosworth did it alot after I fitted Grey injectors to it since I was running 35psi boost and they simply dumped to much fuel in when the throttle was closed between gears. In non turbo cars its caused by over fueling when you shut off and is bad for both economy and your cats!Then there are the afterburner kits inside the tailpipe.
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