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Minimizing smoke
by
colectb
on 28 Jul, 2009 17:23
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I know its part of having a diesel, but what are some tips for reducing the black smoke when accelerating? Anything I can do to the car? (without delving into timing for the time being) I just don't like seeing that black stuff coming out, its one of the reasons why diesels are mistakenly seen as gross polluters.
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#1
by
theman53
on 28 Jul, 2009 18:19
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Change the air filter??? Get more air for the fuel to burn more completely or turn the fuel down. You could search for how to make your 1.6/1.9 NA or TD a faster car in the FAQ and do the opposite of what is said to do with the fuel screw.
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#2
by
colectb
on 28 Jul, 2009 18:46
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I have a 2.0 Audi 5 cyl TD, and maybe a custom intake with a cone filter on the end would draw in much more air? Or would it be too easy to become hydrolocked?
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#3
by
8v-of-fury
on 28 Jul, 2009 18:57
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As long as you dont put the cone where water will be likely to be sucked up, hydro locking isn't likely.
Turn the fuel down, increase the exhaust, bigger intake, and less Lead Footing
lol
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#4
by
colectb
on 28 Jul, 2009 19:09
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I'm still kind of new to these engines, where exactly is the fuel screw and what direction does what? Is there any danger to running a little leaner like in gas engines?
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#5
by
8v-of-fury
on 28 Jul, 2009 19:13
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You don't adjust richness or leaness. Your adjusting how much fuel is injected per where your foot on the pedal. Rich or Lean, or more correct Retarded or Advanced is adjusted by setting the timing of the pump with a dial indicator.
Search the FAQ there is wonders of info in there
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#6
by
Rabbit on Roids
on 28 Jul, 2009 22:29
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turn up the boost too, that takes alot of smoke away too.
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#7
by
colectb
on 29 Jul, 2009 16:28
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Hmmm, thats the best advice i've ever heard
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#8
by
Rabbit TD
on 29 Jul, 2009 18:45
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Have you ever had the injectors rebuilt if it's got a lot of miles on it? Worn injectors make a lot more smoke than good ones even though the car starts and runs good and have your timing checked and make sure your filters are good. If nothing else run a can of injector cleaner through it, it will definately make a difference if you've never done it.
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#9
by
colectb
on 29 Jul, 2009 19:13
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Ok, thanks alot for all of the suggestions. For now i'm going to try:
1: A new air filter, or new intake system, I don't think the inlet to the airbox is big enough, i may go with direct plumbing to the turbo
2: Turn up the boost to probably around 12 psi where the k24 wastegate starts dumping.
3: Mess with the fuel and smoke screws, this is still a bit foggy to me, but i guess i will do some trial and error turning things down.
4: Fuel injector cleaner or diesel purge. I believe the injectors were replaced when the engine was rebuilt around ten thousand miles ago, but i don't think diesel purge will hurt.
5: Intercooler to make things a bit more efficient under the hood.
I just want the least smoke and best economy, while keeping or adding a bit of power, thanks alot for the suggestions, and I will keep everyone informed if I can significantly reduce the smoke.
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#10
by
rabbitman
on 29 Jul, 2009 19:39
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For an easier fix than a new intake you could just turn the boost up.
Adjusting the "smoke screw" to pump less fuel in is like putting a block of wood under the go pedal.
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#11
by
colectb
on 29 Jul, 2009 19:44
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Ok, I'm already running about .6 Bar so around 9 psi. I don't have a good boost gauge, just the stock one, but thats good enough for me. What would be a good pressure to set it to? Sorry for all of the questions, but coming from the NA gas porsche world to the turbo diesel VW/Audi world is quite a change
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#12
by
8v-of-fury
on 29 Jul, 2009 20:49
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Press the pedal less hard...
Andrew, I don't wanna be the one to say it.. but you are lame
what kind of fun can you EVER have with anything being less hard lol
Pedal always %100 matted.. probably explains why i get 450kms a tank outta my 1.7 loool
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#13
by
colectb
on 29 Jul, 2009 20:52
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Doesn't work, it always smokes while accelerating no matter the speed, i just cant see it in the mirror unless its matted down.
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#14
by
8v-of-fury
on 29 Jul, 2009 20:56
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if you don't like Sootin' people out.. why drive a diesel? lol
every diesel i have ever seen smokes on acceleration i think. It's just how they roll Dawg. LOL
I mean do all those things u said.. as it will greatly increase every aspect of the car.. but i dont think u can get rid of smoke completely..