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7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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Old 09-04-2011, 12:37 PM   #1 (permalink)
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How to blow more black smoke?

I have a 1994 F350 7.3L IDI Turbo Diesel 5 Speed. Can't put a chip in it. What are my options to make it blow more black smoke? If I'm moving and throw it into a higher gear so it has to work harder is the best I can do right now and it still doesn't do all I would like to do it. Any ideas?
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Old 09-04-2011, 02:15 PM   #2 (permalink)
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I'm pretty new to the diesel world, so this might seem like a silly question. But why would you want your truck to blow MORE black smoke? I take that as a sign that it is not fully burning all of the diesel in the cylinders, but rather, blowing raw diesel out the pipe. Less power, less mpg, more pollution, and so on. What am I missing?
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Old 09-04-2011, 02:34 PM   #3 (permalink)
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Exclamation This subject has been beaten to death

Have you stopped to consider that bellowing big couds of black smoke is drawing attention to you and the diesel engines in general? It is in fact unburnt fuel and you and me and your kids and mine and my grand kids get to breathe that stuff. It is no secret that I don't like all the attention we get and the smog regulations that resulted from all the negative publicity. As it is now us IDI's don't have to have any emissions equipment and I would like it to stay that way.. Keep raising the big black cloud and some one will notice and then we can all spend $$$ to comply or buy a new truck- neither of which I can afford.....End of soapbox.......

Turn up the IP or stuff a rag in the intake would be the quickest way to blow smoke.
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Old 09-04-2011, 03:10 PM   #4 (permalink)
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What am I missing?
Nothing, it shows you've got some brain-power!
I don't get it either. I never drove truck with anyone (including myself) that ever got their panties in a wad because their truck didn't smoke pulling grades. Smoke generally means the guy's too stupid to downshift and not lug his engine or he's badly in need of a tuneup.
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What are my options to make it blow more black smoke?
As was said before, stuff a rag or two in the air cleaner duct.
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Old 09-04-2011, 05:47 PM   #5 (permalink)
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I've always been told that a little puff of black smoke at when you mash it to the floor is acceptable, any more than that is just a waste. Take notice of the big trucks on the interstate these days. Very seldom do you ever see one anymore blowing clouds of black smoke out of the stacks. That is because drivers and companies have realized that it is a waste of fuel/money and it doesn't gain them anything as far as performance goes.

Now if I were competing in a diesel truck show or something and I had a OBD II truck that I could chip, maybe I would turn the chip up for a few seconds to put out a big cloud just for show. But for my daily driver, no thanks.
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Old 09-04-2011, 07:40 PM   #6 (permalink)
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I've always been told that a little puff of black smoke at when you mash it to the floor is acceptable, any more than that is just a waste.
It's normal to have a little black smoke at heavy load, also.
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Old 09-04-2011, 10:03 PM   #7 (permalink)
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I put a smoke chip in my IDI last year, mileage went down and it didn't produce enough smoke. I put the stock chip back in.
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Old 09-04-2011, 10:07 PM   #8 (permalink)
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I put a smoke chip in my IDI last year, mileage went down and it didn't produce enough smoke. I put the stock chip back in.
What brand ?

I was running nacho cheese doritos...Didn't like the smell so went to cool ranch
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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually Photos
ATS Turbo upgrades: 3" DP with 3" exhaust Magnaflow XL muffler: Pictures Here
2012 Copper Canyon 273 FWRET w/2 slides, Air Lift 5000 bags
Pillar pod: Autometer C2 Series gauges: pyro,trans, boost, water, oil pressure
Hypermax Cowl induction, K&N air filter, flex-a-lite 26K trans cooler with fan,Tekonsha prodigy
Train Horns: Pictures here

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Old 09-05-2011, 07:36 AM   #9 (permalink)
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Originally Posted by chuckster57 View Post
What brand ?

I was running nacho cheese doritos...Didn't like the smell so went to cool ranch
Next year you'll have to move to a Sun Chip to meet California regulations
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Old 09-05-2011, 09:05 AM   #10 (permalink)
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If you REALLY want the truck to smoke, set it on fire.
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Old 09-05-2011, 09:08 AM   #11 (permalink)
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We'll have to remember that one and add it to the evergrowing helpful list!
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Old 09-07-2011, 05:23 PM   #12 (permalink)
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Down here we use Pringles "CAJUN FIRE" Dat gonna burrnnn reeeaaal goot!!!


This one needs to go in the FAQ section!!!
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Old 09-12-2011, 09:29 PM   #13 (permalink)
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squelling tires and black smoke dont mean she's broke
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Old 09-12-2011, 09:44 PM   #14 (permalink)
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if you have a turbo gauge you could just pull out the hose, working as a smoke switch
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Old 09-13-2011, 06:26 AM   #15 (permalink)
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My turbo pressure line is 1/16" ID... and it uses a compression ferrule. But disconnecting it won't make smoke, both because it's tiny, and because increased boost does not increase fuel output -- the DB-2 runs solely on the metering device when not at WOT or idle.
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