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Flames out the Tailpipe

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Old 07-10-11, 06:03 PM
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Flames out the Tailpipe
Just curious, I've seen a lot of you guys with flames shooting out of your tail pipes.

What causes that?
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Old 07-10-11, 06:13 PM
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fuel cut on decel turned off, from what i have gathered its unburnt fuel that is ignited by the heat of the turbine housing. i may be completely wrong as well
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Old 07-10-11, 06:14 PM
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It also cause your bumper to get dirty and sometimes catch on fire.
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Old 07-10-11, 06:33 PM
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Originally Posted by MR_Rick
It also cause your bumper to get dirty and sometimes catch on fire.
My old car

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Old 07-10-11, 07:00 PM
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Could be worst

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Old 07-10-11, 07:28 PM
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yeah way worse.
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Old 07-10-11, 07:44 PM
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Lol....
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Old 07-11-11, 02:12 PM
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Originally Posted by dagoof
Just curious, I've seen a lot of you guys with flames shooting out of your tail pipes.

What causes that?
Well an open exhaust helps (downpipe, midpipe, catback). But like Mr_Rick has shown, it can go very, very wrong
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Old 07-11-11, 05:18 PM
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Originally Posted by Aad
Well an open exhaust helps (downpipe, midpipe, catback). But like Mr_Rick has shown, it can go very, very wrong
LOL

That's not exaclty what I had in mind.

I have a feeling that there was more going on than just an open exhaust shooting a little flame upon deceleration.
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Old 07-11-11, 05:29 PM
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You can look all over you tube. It does get pretty bad.

http://www.youtube.com/watch?v=0pr3tQYpS3Q
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Old 07-11-11, 06:06 PM
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Originally Posted by hkp
fuel cut on decel turned off, from what i have gathered its unburnt fuel that is ignited by the heat of the turbine housing. i may be completely wrong as well


Just curious....how do you turn off the decel fuel cut?
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Old 07-11-11, 06:13 PM
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With a Power FC or something similar.
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Old 07-11-11, 06:57 PM
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Tho even with a Power Fc it can still happen. Ive had a few instances and even a confirmation that Ive shot a little flame. Though this could be do to my car not being tuned.
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Old 07-11-11, 07:11 PM
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Originally Posted by MR_Rick
With a Power FC or something similar.
of course...but how?
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Old 07-11-11, 10:46 PM
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i dont know about the pfc, i have always used haltech..... i will let you know in a couple of weeks
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Old 07-11-11, 11:25 PM
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Originally Posted by Hotwheelz
of course...but how?
Do you have FC-Edit? Go look in Settings 1.
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Old 07-12-11, 02:28 AM
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nice receipee for flames:

ported engine, open exhaust from turbo, and a rich fuelmap.
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Old 07-12-11, 06:38 AM
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Originally Posted by Hotwheelz
of course...but how?

FCEdit
Settings 1
increase the rev # under F/C fields. Change to 8100 and you'll never cut fuel.
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Old 07-17-11, 12:41 PM
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Thanks for that picture ^....but is there anyway to perform a similar action with just the commander? As i dont have a datalogit
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Old 07-17-11, 12:46 PM
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Originally Posted by Hotwheelz
Thanks for that picture ^....but is there anyway to perform a similar action with just the commander? As i dont have a datalogit
Rev/Idle screen under settings
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Old 07-17-11, 12:55 PM
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i found it...and it was already set to 8100rpm. I have a stock ported single turbo with 3" strait exhaust which bottle necks to 2.25 in the greddy muffler. I dont think i have flames on decel
Attached Thumbnails Flames out the Tailpipe-001.jpg   Flames out the Tailpipe-002.jpg  
Last edited by Hotwheelz; 07-17-11 at 01:07 PM. Reason: added pictures
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Old 07-17-11, 01:07 PM
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no you want to change the "F/C" settings (decel fuel cut recovery speed)

I understand the entertainment factor of creating flames and all, but you do know this wastes fuel? Also I can't be sure if it's going to affect the behavior of the idle controls system on your engine (possible high idle on deceleration). I'd say try it out for the heck of it and then put the settings back
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Old 07-17-11, 01:10 PM
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Originally Posted by arghx
no you want to change the "F/C" numbers (decel fuel cut recovery speed)

Assume im retarted for a minute. Which one is decel fuel cut recovery speed...and what do i set it to?
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Old 07-17-11, 02:11 PM
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Set all 3 F/C settings to 8100

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Old 07-17-11, 02:45 PM
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On that screen:
Rev limit: Allows you to limit how high you can rev your engine.
f/c ae - fuel cut when running under normal conditions
f/c el - fuel cut when running extra electrical load (rear defroster, fog lights, etc)
f/c ac - fuel cut when air conditioner is on
idle ae/el/ac - adjust your idle for the same situations above.
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