Black smoke question...
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Senior User
Joined: Feb 2006
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From: San Pedro, CA
Black smoke question...
I read a lot of threads here and guys are wanting to make clouds of black smoke with their trucks for some reason. Why is this? Is there a reason for wanting this to occur other than to look like an old filthy school bus? Does the black smoke indicate the truck is running strong? I dont get it. What am I missing here?
Lead Driver
Joined: Sep 2006
Posts: 5,665
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From: Cartersville, Ga
I think it looks awesome. I was behind a duramax the other day on a split four lane road and when he punched it to go around a truck he completely blacked out all four lanes. It was one of the coolest things i have seen.
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Joined: Dec 2003
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From: Arizona
Originally Posted by Bobmarlin
I read a lot of threads here and guys are wanting to make clouds of black smoke with their trucks for some reason. Why is this? Is there a reason for wanting this to occur other than to look like an old filthy school bus? Does the black smoke indicate the truck is running strong? I dont get it. What am I missing here?
At max load on a diesel engine the quanity of fuel injected per cylinder is still at 50% Stoichiometric lean. So you can add more fuel to the cylinders which creates black smoke and more Hp & Torque. The black smoke is do to incomplete combustion, because the air fuel mixtue is not in the cylinder long enough to completely burn the fuel even though there is still an excess of air/O2 present in relation to the amount of fuel present (Stoichiometric lean). The downside is your fuel mileage decreases and your soot & particulate emissions increase at this point. Generally the only diesel engines you see making black smoke on purpose (other than those wanting to show off) are Drag trucks and Pulling tractors/trucks. The extra Hp & Torque is more important to them than MPG or emissions. You can also get black smoke if the injectors are worn or leaking.
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Joined: Apr 2004
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From: Ellensburg, Washington
Personally I'd rather utilize all that unburnt fuel escaping my tailpipe. The more fuel you utilize the more HP gains you'll see. If you pay for the injectors you might as well utilize their fullest potential.
Cowboy Steve
Cowboy Steve
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I can understand the black smoke need by some, but I personally would be embarresed by it. To have this beautiful truck billowing out black smoke would make most people think what a piece of crap! Its like seeing a hot beautiful girl with a bangin body and then she rips one. 
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From: San Pedro, CA
Thanks for clearing this up for me. I sort of figured it was just for "show" but was a unsure...
Reave THAT comment still has a smile on my face. Good job!
Originally Posted by Reave1
Its like seeing a hot beautiful girl with a bangin body and then she rips one.
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Joined: Jul 2007
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From: Las Vega$
generally black smoke means the vehicle is making power. there is an excess of fuel.
and yes, when you're making the smoke, the truck is MOVING..
now when you've got a big *** turbo, and you're still making black smoke, you are FLYING !
and yes, when you're making the smoke, the truck is MOVING..
now when you've got a big *** turbo, and you're still making black smoke, you are FLYING !
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