Help.
The exhaust pipes are rusted through, that sucks,and the cap smells like diesel exhaust fumes. Who or what company makes an exhaust for the 1984 6.2L?

i would go down to your local exaust shop and see what they can do for ya. the pipe is pretty much a straight run back, so i dont think it would be to expensive. should be less that paying shipping for a bunch of pipe shipped to you.

If you're still running stock exhaust I'd take advantage and get a local exhaust shop to fab up dual 2.5 or 3 inch right from the exhaust manifold back. You'll gain some power and it'll sound way better.

Yep, just take it down to the exhaust shop and tell them to make up an exhaust... It probably won't be cheap, but it will be cheaper than getting a premade exhaust...

It may cost more but it'll last longer than the prebent stuff at napa.

I will go to the local exhaust shop. I will have them run 2.5" or 3" pipes with an X pipe.

About the X pipe:
The X pipe is probably over kill, but I have seen to many people gain a significant amount of torque and horsepower with an X pipe. Also, all the adavantages I have seen were on gas engines. I know, I know, I'm dealing with a diesel

Im almost in the same boat here .With winter coming along and the michigan salt and wetness it wont be long and I to will need to up grade the exhaust .

My question is :confused: what muffler do we use ?? I dont mind a little rumble but quiet and power would be great. :help:

Im almost in the same boat here .With winter coming along and the michigan salt and wetness it wont be long and I to will need to up grade the exhaust .

My question is :confused: what muffler do we use ?? I dont mind a little rumble but quiet and power would be great. :help:

I have dual 2.5" with a pair of IMCO mufflers on my 83 K5. Sounds awsome. They are equivalent to a flowmaster but I think they sound better. The guy that runs the muffler shop also uses them on his personal truck.

hoosier83,
Do you have any video of your truck?

justonetruck,
I may use magnaflow mufflers. They make specifc diesel mufflers

I have seen to many people gain a significant amount of torque and horsepower with an X pipe. Also, all the adavantages I have seen were on gas engines. I know, I know, I'm dealing with a diesel
Anybody know if a guy will get the same type of results with a diesel from using an x-pipe installed? I'm afraid I am a little ignorant when it comes to exaust systems. Does the x-pipe equalize the pressure between the two exaust pipes? Does that create better flow?

i really doubt you guys are gonna see any "gains" or differences with running a X-pipe. A high horsepower muscle car is one thing, but as for a 20 year old n/a diesel, i wouldnt count on it. I wouldnt waste your time or money with it. just my 2 cents

Yes its purpose ois to equalize pressure. Not too sure of the pros and cons on a diesel though.

I have no numbers to back this but I agree with HighSierra86. Dual 2 1/2" should be quite ample with out an X-pipe and you eliminate any future PIA working around it.

Gerald

If you want a little noise go glasspack mufflers, sounds great, cheap to buy. If you want alot of noise go with straight pipes, it will be really LOUD. Myself I have had glasspacks for 3yrs. Up until last month it didn't sound real good then I blocked my EGR off at the intake and it sounds great.

Generally, when significant horsepower is gained with a crossover pipe, it is part of a tuned exhaust. Tuning exhausts is something of an art, although it really isn't that difficult if you know what you are doing (although there is an element of trial-and-error to it). Basically, the length of the pipes and the distance between pressure pulses in the exhaust can be used to help evacuate burnt gases from the combustion chamber. There is a rather long explanation for this which I won't bother posting here as there are a great number of variables that can affect the way this process works. In certain situations, the crosspipe can become useful... It allows you to use the pressure/vacuum pulses of the other bank of cylinders to help evacute the combustion chambers. Crosspipe placement is critical for it to be effective... If it isn't right, it won't draw spent gases out of the cylinder, it will stuff it full of burnt exhaust and reduce the power output. Also, tuned exhausts are generally tuned for a certain rpm (generally high) and if you run them at a lower speed power output won't be as high as it could.

That said, tuned exhausts for a diesel are not as useful as a tuned exhaust for a gasser. Diesels will gain more power simply with an wide open exhaust. In other words, bigger pipes are more effective than a tuned exhaust, so the crossover will probably not do much of anything for power and is just one more complicating factor to work around when you are working under the truck.

hoosier83,
Do you have any video of your truck?

justonetruck,
I may use magnaflow mufflers. They make specifc diesel mufflers

Sorry, no video. I can tell you it's not loud until you really get into the throttle, then it sounds great. You can barely hear it cruising down the highway with the radio off. Hope this helps.

You can barely hear it cruising down the highway with the radio off.

That'd be nice... I can't hear the radio in my truck unless it is turned up most of the way (and no, I'm not deaf). :eek: It is a pretty loud truck, and most of the noise isn't exhaust noise... ):h

Well not to go off topic or anything but....I cant here my radio no matter what I do cause....I dont have one!

Mine only selects to the left. If I miss a station I gotta hit the preset that takes it to the far right and try again!:rolleyes:

Mine did that too... I took it out and fixed it. My radio is better than nothing. No cassette player or anything, but it does work. My Volvo, on the other hand, does not have a radio...

I don't know what the mufflers I have on my truck are, but they are pretty quiet. I don't get much exhaust noise at all, it's all this diesel rattle...

Tuning exhausts is something of an art, Basically, the length of the pipes and the distance between pressure pulses in the exhaust can be used to help evacuate burnt gases from the combustion chamber. There is a rather long explanation for this which I won't bother posting here as there are a great number of variables that can affect the way this process works.

High Sierra,

Can you point me to a place where I can read up on this? Web page? I gotta find out how to tune an exaust! Is there a formula to use?

Gosh, I don't know. I learned about it when I was into motorcycles... I used to do a lot of high performance motorcycle tuning, and tuning exhausts was crucial. I do remember that many performance motorcycle tuning books have excellent and detailed explanations...