My friend has recently de-smogged his truck, but misses how quiet it used to be. He apparently has a smallish muffler now, but is looking for ideas on how to quiet it down more. Has anyone dealt with this before? If so, what would work?

 

Since there aren’t any other suggestions I guess I’ll be the first. He could call the EPA.

 

If he has no muffler at all, I would just match up an inexpensive Summit Turbo Muffler to his exhaust pipe size and see how it sounds. If you have options, go with the longest one he can fine. That will quiet it down a bit and the Summit mufflers flow pretty good too.

EDIT - I guess the Summit Brand Mufflers only come in small inlet sizes, so just enter his inlet / outlet size and configuration into summit and see what pops up.

Mufflers

 

I'm having my truck deleted Friday & am kind of worried about how it will sound towing so I have searched & found several on ebay, 4" inlet & outlet in several different lengths from $55 to $180. My guess is the longer the length the quieter but I really don't know.

 

My truck has the muffler, sounds like a giant vacuum when warming and had a drone. Not too loud but definitely louder than stock. I have a sound bite somewhere in this forum from when i first did it.

 

If your friend was worried about noise he should’ve of kept it stock, the point of delete is to get rid of the crap for free flow and do what a diesel is supposed to do, nothing sounds better than a deleted powerstroke!

 

Donaldson has a muffler option for the 6.7L.

 

If you delete your truck expect it to blow black smoke all over your camper. I just don't get why people do this. You will not gain anything from doing a delete.

 

I believe you are correct if I put some crazy a$$ tune on it with the delete, that's not what I'm after.

 

If you keep the tune set near stock power levels then you don’t blow out the bellows of black soot but you do get the turbo whistle.
As for the advantages - no more regen cycles, no more DEF fluid, better mpg, more power. If you’re in this for the long haul then, I have read, the filter will need to get replaced 100k+ miles for $3k or so.

 

Having been down this road a couple of times myself, I have a couple of suggestions. https://www.ftediesel.com/store/pc/v...4&idcategory=7
These resonators work great, especially for reducing drone, which becomes much more noticeable when towing. When my truck underwent surgery, a 4" Flow Pro muffler and piping went on, and I didn't like the increased noise and drone. I installed the 17" resonator as close to the downpipe as feasible, and it made a significant reduction in drone and noise. It sounds very good now. On my '97, when I went from 4" exhaust to 5" I installed the same FTE resonator and it made the 5" quieter than the 4". After significant research, if you want it to be about stock noise level, then their 30" resonator is the way to go, and then you don't even need a muffler.

I will also say that I have a nephew who recently purchased a deleted '18 with an MBRP exhaust system and muffler on it, and it sounds very different from mine. His is very hissy and turbo whiney, which I actually like, while mine is a burbly, deeper gas V-8 sound, and his seems a little quieter inside with almost no drone. I'm really not sure why the two different mufflers sound so differently because they're almost the same size.

BTW, I've been on these forums since about 1998, and I rather miss the independent attitudes of old. Nowadays, if someone mentions doing something to their truck that the almighty government doesn't sanction, immediately a bunch of people start dumping on him for not being a good 'comrade'. I guess that's just part of being woke and considering yourself a subject of the state rather than a citizen.

 

This is what I'm shooting for, I'll deal with the noise part if & when I have to

 

I have 154k on my filter and still only time it regens is when it hits the 500 miles trigger.

 

Since you're in CO, I'll remind you that the state passed a "Rolling Coal" bill a few years ago. Cops can cite you for a soot cloud. Emissions testing in CO is just the front range as far as I know, but the law applies statewide.

 

Yes Sir I do know about the "rolling coal" B S & that's definitely not what I'm looking for.
I'm about 275 miles from that zoo front range over there & that's as close as I ever hope to be to, I call it Calif East when I talk to my brother who is in Englewood lol
We are pretty much still in America over here