That dyno room is the most idiotic thing I've ever seen. No exhaust extractors or anything. Set aside how bad it is to breath that shit in, but think about your engine. That cooling fan sucks it right up and shoots it right at your intake. For the people running filterless turbos, thats a REALLY dumb thing to do
Da vid Same way you do it in any dyno cell, you dumb shit, a long flexible metal hose. We do it all the time at the dyno here, it isn't rocket science.
I like to think I'm one of Motor Trend's biggest fans, the production value of your videos is always top notch. But this video is all over the place. What is up with the audio changes? That said, freaking love these machines. Can't wait to see the rest!
Fun Fact: A diesel engine that has optimized cylinder scavenging, and purging will not produce any black smoke, and will reach up to 45% efficiency! Sadly instead of making their engines run as efficiently, and as smooth as possible they just add boost, and fuel in hopes of power.
When your talking performance, especially performance at the peak of an engines capacity you will always have access fuel. Doesn't matter if it's diesel or gas. Prime example look at the top fuel drag cars. Fastest accelerating vehicles on the planet. Just look at the pipes at night time and you can see the nitro leaving the exhaust. There's so much extra fuel it doesn't even have a chance to combust it all in the cylinders and they shoot flames almost 10ft out of the side of each car. In the right conditions you can see liquid trickling out of the exhaust. Yes throwing air and fuel at a engine is how you make power. Thats how everyone does it. How much air and fuel can you get it, how can you do it quickly and how fast can you get it back out are the core premise of horsepower. Could they make them more efficient? Yes. But this is a dyno event the trucks are tuned for performance only anyway.
Yeah but the thing is it makes more power, not that healthy for the Engine or turbos I suppose but it makes power and it's probaby too difficult for most people to tune it to gradually increase fuel with boost so that it makes power without smoke. I mean most of them clear up when boost is fully there but yeah nothing to defend here. If I had a Diesel I'd try to keep the smoke on a minimum level but then I wouldn't want to go for maximum power and torque, I'd keep it usable.
Ton's of respect to everyone who brought there truck. A special thanks to the show for sharing the country information and not just the province / state.
Thank you KJ, Brian, and Diesel Power crew. These are always fun to watch and read about, and I'm really glad you keep it fresh with new competitors each year. Diesels have never been my thing personally, but the numbers they generate are staggering! Looking forward to the rest of the competition! Edit: Good luck everyone!
Last year one of the contestants was called out for that and his run was deleted. So this year they must have changed the rules. But I agree with you 100%
Holy Hell Sally. Who dropped y'all when you were born? Chrome rims with low profile tires, destroked motors, racing seats without a cage, and the list goes on. This is terrible.
I was starting to wonder whether this would even be up on youtube. As a guy who doesn't have any affinity towards any of the engines in use here, I find it interesting that the Cummins engines tend to make enormous amounts of torque and they make their power at lower engine speeds. I just wish I could do this with an old 1950's GMC with a Detroit Diesel 2-stroke under the hood. That would bring some excitement to this competition.
yeah all that weight and power is scary, theres only 1 place within 3 towns around me that will actually let me run my truck and it only puts out 600hp
It's not DPC without allowing Levon Miller the chance to defend his title. He beat everyone two times in a row and it's unfair to change the format like this.
Yeah if they wanted trucks with intact emissions equipment just create a second class. Have an Open class where anything goes and a Street Mod class with emissions stuff. And they're not even driving over the continental divide this year either.
An emissions class wouldn't really work with modern diesels. Anything with DPF or DEF, for example, has to have everything deleted to do any kind of worthwhile tune. Any other emissions equipment is really just B.S. anyway. Gone are the days of a simple tuner adding 100+ HP. A full turbo back exhaust is required for anything you can actually measure.
just wondering why they put the fuel challenge on the dyno vs out on the road. It seems like they dont want the trucks to drive on the street for the event. i think the best part of the challenge was to see them out on the street.
ok that destroked cummins s sounds interesting. I wonder why he did that? I also wonder if we are ever going to see the 5.0L Cummins in the Nissan Titan XD in this competition in the near future. it may not have the displacement these trucks have but would still be interesting to see.
Destroking a motor reduces the rotational mass and allows the engine to spin higher with less load. As long as the fuel system and heads can handle the higher flow rates you will make more power and cause less stress on the bottom end, especially under boost.
I must say I seriously like the content of this video. Lovely work of Brian and the editors! It's good to see the masks on the dyno guys! I just have one problem with the show. It should be called: Diesel torque challenge :)
Love the competition and love my diesel (04.5 Cummins) but I am a bit disappointed Miller wasn't able to return. He put up some serious numbers and one he!! Of a truck.
Diesel can burn very clean, it only has black smoke like this when its super super rich. The 2011+ Ford 6.7 in stock form has zero soot from the exhaust. Today's diesel truck puts out like 1/100th of the emissions than one that is 15-20 years old. It is possible to make power and not have the black smoke. Gale Banks has a few big power diesel trucks, and he said himself that he hates "rolling coal," and none of his race trucks have any of the black smoke.
Sorry lads, but if ya take that big'o turbo from your cars, they're near enough usless. Be a man, and feed your baby so good shit. The finest brew on earth, petrol. Don't feed it any old crap.
You know, this is at least the second year that I can remember Diesel Power Challenge using the same dyno shop. I'm surprised they haven't taken the time to setup a proper exhaust ventilation system.
Karl Napp Like i said, not possible for *them*. They don't know how to make a powerful, but yet efficient diesel truck that don't smoke. All they do is just crank up the boost and add more fuel than air and hope for 1000+ HP.
Seems like it shouldn't be legal to have some guy standing in front of the truck spraying nitrous into the turbo. If it can't be done while the truck is moving, what's the point?
Would sucking all that soot back into the intake not decrease peak power? By the time they were at peak RPM a lot of them were sucking soot back in through the fans because so much had built up
it seems like there is a lot more soot than last year's Diesel truck challenge but less horsepower and torque. So bad tunes for everyone i think is the issue because the soot is gas burning in the exhaust and not getting used up in the cylinders
Feels like the power levels have come down from last year?: Hell some of the guys I work with are making the same number on mostly stock Cummins with tunes?
Daniel Perry On a dyno like this it's very hard to get the turbos to spool. The engines make lots of torque but have a short rpm range so it runs out of rpm before the turbos can really spool. So, most of them could likely make quite a bit more power if they had a way to better load the truck down so turbos could spool.
dont understand after years of dynoing trucks at this place it still doesnt have piping or exhaust fans or anything to let the exhaust out. Im sure sucking in that black smoke killed some of those trucks top end.
"rolling coal" haha yeah right through your own intake and makes the setup even worse..Good tune = No black smoke. And the dyno? WTF a place where they regularly "tunes" diesel trucks should have a fucking vent or even better a filtered ventilation system. Muricahhhh
