New exhaust

I have a boner for my new exhaust on the truck, this is the 3rd forum I've posted it on. :grinno: Pics and info here http://www.posracing.net/POStowrig.html

Trucks are way cooler than DSMs... :icon16:

Man, that exhaust is PIMP!!!

Way to go man, it looks great! I know you are going to love it.

I'll love it more when I get injectors or a fueling box, and that 5" tailpipe is billowing out massive amounts of black smoke. First task is to smoke out this entire condo complex that I live in, just because I hate everyone that lives here :)

I've never seen a 5" exhaust before. That looks intimidating to say the least. Since the truck's a diesel, would all the turbo basics (spooling, clip or not, boost spikes and creep, etc etc) that apply to gas driven DSMs still hold true for the truck?


(I wanted to word the question differently so it made more sense, but can't put it together right!)

Diesels are very different. Raising boost, increasing airflow, etc, dont necessarily produce power as they do in our application. Its all about burning fuel. In fact there is no air throttling done at all. The gas pedal is connected to the fuel pump ;) There is also no real boost control. The wastegate is more of a pop off valve, simply limiting maximum boost. Many diesels have no wastegate what so ever, and you have to be careful not to over spin the turbo. The more fuel you burn, the more boost you get, and thats how you get more air. Adding too much fuel will increase EGTs, the safe limit for the cummins turbo diesel is considered 12-1300 degrees F. If EGTs go over that you need to reduce fueling, or increase airflow. So the larger exhaust will allow me to add more fuel before EGTs get too high. Still need to find a way to add that fuel though. Injectors, chip/box, etc.

good choice with the dodge kevin.

i like trucks better than cars too. Yet i still want a turbo dsm. I guess they just got it in for me.

dam 5inch,i thought 4inch was the upgrade but 5 inch is nice!hows the sound on that bad boy?

WOW...."that's a huge bitch" duece bigalo......nice exhaust
I saw the drum and thought... damn that is one hell of a redneck salad bowl!!! lol

You should post some audio of the exhaust when it is all done....

Diesels are very different.

I thought so.

We used to have a 1990 4-dr Mitsubishi Pajero (Montero) that was a turbo-diesel, intercooled 4G64 SOHC (RWD, 4WD-on-demand), 5 speed manual. That thing had insane torque for the 2.4 litres of miniscule displacement, and out-drag most pertol cars on the road. It had a big sticker from the factory on the said that read "turbo wagon". I never really understood back then what a turbo did, but now that I recount, the SUV pulled like it had a supercharger all the way to red line (ie to say, linear acceleration, no peak boost accompanied by whiplash... redlines on deisels are really low, 5K in this case). There was practically no BOV sound, and spooling noises where often muffled out by the diesel engine except for high gears (oddly so). Considering the very high compression ratios on deisels (which is why no spark is needed to ignite the air/fuel mixture...the heat alone is sufficient to do the job, and glow plugs help when initially starting up), I don't think the turbo put in a significant amount of boost, but it sure pulled like it was on steroids.

We also had a 1993 1.8 litre RWD turbo-diesel Nissan Sunny (Sentra) that was pretty cool for drifting around local city blocks. lol. Diesel seems to be the cheaper fuel in both Europe, and large parts of Asia, hence a lot of cars were manufactured with deisel engines. The best diesel I have ever driven is a 4.5 litre turbo-diesel Toyota Landcruiser (called the "VX limited" in SE Asia)... you had traction issues all the way up to THIRD gear if you were really pushing it!

sweet so when are you putting a 5 inch on your gsx?

sweet so when are you putting a 5 inch on your gsx?

LOL i'd love to see that happen.

At least they say diesel exhaust is less toxic than that of a gasoline engine. I'm aware of how much black death can be made from a cummins diesel. Good luck. :) When are you going to tell us what the plans are for the 1g?

5" exhaust has bragging potential. Or ricer envy ;)

Size matters. I like how everything is bigger on American cars with plenty of room to work. No pita in trying to reach what you're working on, either. I'm halfway through removing the AC and I'm already happier :)

What's up with the recent posts about getting out of dsms, getting old and fat, needing an evo, ultimatums with Mitsu bankruptcy, etc? And if you leave dsms for a truck I'm not sure what to say, lol.


At least they say diesel exhaust is less toxic than that of a gasoline engine.

Diesel gets better mpg and is more efficient but is a hell of a lot more dirty, even considering the better mpg. BAU lobbied against it's regulation until the 90's, even though the EPA knew it was toxic since the 70's. Bad times, that stuff runs school busses.

Diesel gets better mpg and is more efficient but is a hell of a lot more dirty

Diesel is "dirty" in terms of actual, visible soot and carbon it gives out (really black exhaust fumes VS the more liberal white/non-colored gases out of pertoleum). However, I have HEARD that its toxic content is in fact less damaging to the ozone and environment than pertol fumes.

Also, biodeisel is an amazing new alternative to deisel. It is cleaner (exhaust smells like FRENCH FRIES, would you beleive!), much cheaper, and gets even better mpg than regular diesel. This diesel is extracted straight from soybeans with minimal modification to form and content.

The mindboggling thing is that biodeisel can be added to ALL existing diesel engines without any modification whatsoever. Truckers across the country have started using it, though the frequency of biodeisel refueling stops is scarce at this point in time. You can LITERALLY pick up a bottle of Canola cooking oil, and run it right off Vons shelf in an emergency (will burn bad, but not enough to hurt engine, will get you from A - B without issues).

Unfortunately, America can only reserve land enough to supply 130 million gallons of the fuel...truckers alone use 40 billion a year, so thats going to be a problem.

Just thought I'd share some stuff I spent hours listening to on Coast-to-Coast AM with George Noory. It's pretty neat.

Diesel is "dirty" in terms of actual, visible soot and carbon it gives out (really black exhaust fumes VS the more liberal white/non-colored gases out of pertoleum). However, I have HEARD that its toxic content is in fact less damaging to the ozone and environment than pertol fumes.

Kinda in line with my major, learning a bit about this stuff. I can't pretend to know much. Mostly because of better mpg, co2 emissions are lower with diesel, which is responsible (at least if you're a democrat) for global warming. Particulate emissions are worse from diesel, which is closely tied with lung cancer. Shypder said all this, and I agree. Trucks and busses that run on diesel have no mandatory smog checks and aren't held to the same requirements of cleanliness that gasoline engines are. There are different tiers, gets kind of complicated. CARB thinks burning diesel causes 14000 premature deaths in CA alone. Sulfur emissions are really bad, so the mix of diesel is being reworked, and the DOE study says that 20% more oil and heat trapping gasses will result from the new mix, making it much less environmentally conscious than gasoline. Nitrogen emissions are worse, too, which are responsible for ozone depleation. Umm, I don't wanna jack this thread, anymore than I already did. If you want to hear more of my tree hugging propaganda, let me know :tongue:

Back to 5" diesel loving exhaust :)

Newer deisel fuels are also much lower in sulfur content, so be sure to look at recent data when discussing diesel emissions. In fact, I believe its 2006 that all diesel fuel has to be sulfur free or very close to it, so more diesel vehicles can run cats. Mine didnt come with one. Some diesel motors run the tits without the cats, others could use one.

You wont hear a BOV on a diesel, because there isnt one. There is no throttle plate to close, so no need for the BOV. :)

The torque and power curves for a diesel are VERY linear. In my case, there is a shitload of torque right from idle, peaks at 2000, and relines at 3000 with almost as much. Check out edgeproducts.com or similar, they have some before and after dyno graphs for thier boxes.

Compression ratio on my truck is 18:1 IIRC, most are closer to 20 or a bit over in some cases. My motor also doesnt use glow plugs. There is a heater in the intake, but thats it. The new CUmmins 600 motors are good for unaided starts down to something really low, like 10 degrees. I've started all the way down to zero with no additives in the fuel just fine. Runs rough for 5 minutes, but clears up eventually.

Another funny thing about diesels. They wont warm up at idle. I can idle for an hour and it wont budge. I dont get heat till I'm half way to work :D If I come to a stop sign once it is warmed up, temp will start to drop while I sit there. After 5 minutes or so the heat isnt so hot. They burn very little fuel at idle. Some farmers dont shut the trucks off when its below 20 degrees or so, the truck runs 24 hours. I've also seen 30-100 gallon tanks for sale to put in the trucks bed for long hauls or farm use. Interesting...

As far as me being old, fat, bald, tired, and sick of DSMs, its all ture :icon16: I wasnt going to announce it yet, but the 95 and the 91 are going for sale. I Thought they would be built by now, but things (like the sticker for this truck) keep getting in the way. I am going to buy an EVO, then get a house with a garage, and then probably build a full race car. Could be a year or two though before its built and running.

Newer deisel fuels are also much lower in sulfur content, so be sure to look at recent data when discussing diesel emissions. In fact, I believe its 2006 that all diesel fuel has to be sulfur free or very close to it, so more diesel vehicles can run cats. Mine didnt come with one. Some diesel motors run the tits without the cats, others could use one.

Meh, I agree, but it's not that simple, and I'm not going to argue with you. Most of my dsm knowledge is ultimately from you. Instead I'll write a paper on this for class and submit a copy here (or link to a copy) of why I respectfully disagree.

More importantly, how dare you leave dsms :)

How long has it been since you changed the spark plugs and wires! :loser:

I had a guy bring his dodge to me asking me if I could change the plugs and wires because he has never done it in the 60k miles he had owned it for. :rofl: :screwy:

around were i live there is a gang of desil trucks that pace with each olther on hwy100 (local cruise road) they have CBs and all that shit, all jacked up too. well anyways they pace at about 30mphin each lane (making a moving road block) and if you try squezing past em they box you in and mess with you...long story short there is one early 90s ford desiel that jacked up and has 2 5in smoke stacks...well that thing sits at inter secitons and trows it into nutral then floors it. creating a massive clowd of black smoke,,pretty awsome if you see it , not so awsome if your behind him at a red light......

As far as me being old, fat, bald, tired, and sick of DSMs, its all ture :icon16: I wasnt going to announce it yet, but the 95 and the 91 are going for sale. I Thought they would be built by now, but things (like the sticker for this truck) keep getting in the way. I am going to buy an EVO, then get a house with a garage, and then probably build a full race car. Could be a year or two though before its built and running.
well you gotta have goals.... :grinyes: :evillol:

I'm bringing this thread back to post my tree-hugging response, as promised. For my Environmental Conservation class I wrote a research paper on diesel and gasoline emissions.

Abstract: Diesel isn't very good. Particulate matter will still suck, even after low sulfur fuel is used, and even after cats are in place. This is bad for the environment and even more-so, human health.

Since it's sort-of off topic, I figured I should link to it rather than take space on this forum, unless I'm told otherwise. Warning, boring: http://dsmstuff.blogspot.com/

Feel free to post back here, critiques are welcome. Just don't be a dick ;)