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New Exhaust Suggestions Please

DieselWarrior

DieselWarrior

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Current setup: '82 K5 6.2L Detroid Diesel - True Dual Exhaust, no cat, no crossover.

Desired setup: Y pipe to single exhaust.

Questions:

1) I am guessing it is about 2" out the manifold, can I go from the two manifold connections to a single 3" front to back pipe?

2) Id like to have a quieter exhaust, Im pretty sure some generic Turbo mufflers on on it now. What muffler, within a $75 budget will give it more of a STFU quiet & stock sound? I dont need nor want rumble. When hammer down, the intake is sucking so much air that alone makes a deafening racket!

3) Since Im going single pipe out, what *side* it traditional for the pipe to exit?


Thanks for your time!
DW
 
The drivers side is the traditional outlet on the later trucks. That's where the converter shield was.

I was really happy with my stock 6.2L diesel mufflers on the gas truck, but they've since rotted pretty badly. Walker/Dynomax sells exact replacements. Perhaps you can talk with them (tech?) to see if any of the larger inlet/outlet mufflers would give a comparable sound? I honestly think thus far, stock is the only type muffler that is going to give a decent tone, but still quiet. Their website has actual diagrams of various vehicle systems, including the inlet/outlet arrangements of the muffler, and GM had quite a few starting in the late 1980's.

I've spent a fair bit of time trying to find a quiet single muffler. Most of them (flowmaster, borla, etc), even the specific "quiet" ones, are still noisier than stock.

Your budget is somewhat limiting, but a resonator would help a BIT too. Not a ton apparently, but some. Not sure if anything in the wrecking yards is the right diameter.
 
x2 on Walker/Dynomax.

I just replaced the worn out Cherry Bombs on my truck with Walker's "stock replacement" mufflers. They were about $60 each through Napa. Engine still has a rumble, but no more "cackle/crackle" that the glasspacks give. Its much more pleasant.
 
I forgot to add, Walker/Dynomax tout themselves as OEM suppliers. Not sure how true that is, but if they are exact duplicates of factory, that is a good thing.

They also have Stainless versions for some applications, if you don't want to ever change out again. :)
 
Well, I suppose you could try something like this....

Saw it on my fishing trip last week.

Not sure what the heck it is, but d*mm I bet its quiet...

muff1.jpg

muff2.jpg
 
That's a re-gen set-up...all the new heavy trucks have weird exhaust now due to the re-gen systems.

I had a single 2.5" system on my old 6.2 using a 3 chamber flowmaster. I couldn't even hear the exhaust it was so quiet.

The 3" true duals with 2 chamber Summit knock offs on my '83 6.2...loud, but cool.
 
Whats the deal with the massive exhaust people are running on their diesel trucks now? Is that just the next truck nutz, or is there something with diesels that exhaust that large does indeed help?

Only reason I ask is for the OP...would single 2.5" hinder the 6.2, or not at all?
 
Any exhaust system that fits a blazer with a 305/350 will also bolt right up to a 6.2. That said I bought a Hooker Headers mandrel bent true duel system(without mufflers) and 2 summit brand turbo mufflers for 250 bucks from summit racing.
Replaced the rusted out exhaust on the cucv and gained a smooth rumble and picked up some power too.
Might be an option for you.
 
Being on a hobo's budget forced me to put a home brewed exhaust "system" on my 82 pickups 6.2...

I used a length of galvanized pipe formerly intented to be used on a chain link fence with about a 1-7/8" od to get past the transfer case on both sides (dual exhaust) and I bought two Thrush glass back cheery bombs and mounted them about halfway under the bed ,and use downspouts to direct the fumes downward--(and they soot up my rear axle tubes and brake lines nicely I might add)..

Despite the "restriction" of the smaller diameter pipes and mufflers,I have not noticed any great reduction in power,probably because its always been gutless to begin with..and I dont drive it muck on the street either really..its not as loud or obnoxious as I thought it'd be either,it has a low rumble not much different than a small black has with glass packs ,and just when you get it revving high enough to start getting that "frraaaapp" sound,the govenor kicks in and spoils all your fun...its passed for stickers twice with this setup,the guy never even mentioned the exhaust being too loud,its almost as quiet as stock at idle..the engine makes more raquet than the exhaust does,actually!.

There are air cleaner duct "mufflers" on many 6.2's factory,my Suburban has one and I must say it makes the engine MUCH quieter than my other trucks 6.2 under acceleration,which has no duct,just the gaping hole in the air filter housing,evidently it was ditched before I got the truck..
 
dyeager535 said:
Whats the deal with the massive exhaust people are running on their diesel trucks now? Is that just the next truck nutz, or is there something with diesels that exhaust that large does indeed help?

Only reason I ask is for the OP...would single 2.5" hinder the 6.2, or not at all?
Click to expand...

Turbo diesels do tend to actually need a larger exhaust. Lots of air in, if it cant get out it will raise egts And reduce power. But yes some of them are just stupid like 6" outlets on a stock duramax. I would do the biggest I could easily do and put the largest muffler, turbo muffler specifically, I could find on it. Also if you are gonna run a single out the back run it out the passenger side. Quotes down the truck quite a bit from the drivers seat
 
dyeager535 said:
Whats the deal with the massive exhaust people are running on their diesel trucks now? Is that just the next truck nutz, or is there something with diesels that exhaust that large does indeed help?
Click to expand...

Good question, and let me try to give an educated answer.

Typically, even with a Normally Aspirated (NA) diesel engine, the engine draws in a LOT more air than a similar gasoline engine.

Due to the fact that an engine is more or less an "air pump", the more air the pump draws in the more air it will push out.

Given that dynamic, a diesel will typically have "larger" exhaust.

The trucks you see with the ungodly big exhaust pipes out from the fender, or the stupid as hell stacks out the truck bed, are in great excess and are toys for idiots. "Hey, look at me".

More trivial information: Many of the diesel crowd like to "Roll Coal" as they call it, that is... under heavy load a thick black cloud of exhaust rolls out the pipe. For any modern diesel, this does NOT normally happen, the computer chip is modded or swapped, fuel pins changed, etc.. to give that "desired" result. If a modern diesel vehicle puts out THAT much black smoke its an indication of an improperly operating engine.

Linky:
https://www.google.com/search?q=rol...s=org.mozilla:en-US:official&client=firefox-a


Last bit of trivia: Diesel vehicles do not (IIRC) come with a catalytic converter, it has no application. Also, diesel engines do NOT rely on back pressure or "scavenge" like a gasoline engine, so they will function the same (IIRC) with a straight and free exhaust, or one with a muffler.

HTH,
DW
 
I would do a single 3 inch with a stock type muffler, maybe from a newer 6.0 truck. IMO, it really wouldn't take much to come up with something better than stock for a minimal budget.
 
Every time I see one of those diesel pick-ups with dual 6" stacks through the bed, I think to myself...


"Nice stacks, sorry about your penis." :D
 
^^^ lol

OP, I'd be interested if you're able to find a decent solution with a 3" pipe that doesn't break the bank. I've got a turbo, so a muffler really isn't necessary in this case.
 
I got a muffler shop that will wrap it around the drive shaft if thats what I want...

Ill go by there and get an estimate this, or next week.

DW
 
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