quiet muffler
#31
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I wish I could have dyno'd before and after adding it. My truck still feels very strong and I am much happier with the sound now then before adding it. It still sounds very good outside of the truck. When I 1st pulled out of the garage my wife was outside saying it was still loud. Not when she went for a drive. I know I had stated it felt like it lost power. I have no way to prove or disprove that. If the noise is bothering you then you will not be sorry.
#32
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Is your cat in? I've heard removing that makes for a noisy ride...
#33
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Fisherguy.. I don't think he was complaining about the muffler.. I do not think he has decided to try it yet as he is afraid he will lose power..
I do agree with your comment on drone.. I know in my truck before adding the Donaldson it was 2k that was BAD.. Below 2k was great and I would have been happy if that tone was the entire rpm range.
I do agree with your comment on drone.. I know in my truck before adding the Donaldson it was 2k that was BAD.. Below 2k was great and I would have been happy if that tone was the entire rpm range.
#34
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mine still has a mild (very mild) drone under moderate and full throttle with a load with the 51" donaldson x 5" in/out straight through muffler. the idle tone is good and the exterior noise has throat but does not reverberate off of everything.
i posted a second ago i didnt notice any hp change to speak of on the dyno
i posted a second ago i didnt notice any hp change to speak of on the dyno
#36
![Thumbs up](https://www.dieseltruckresource.com/forums/images/icons/icon14.gif)
Till your post I had not heard of that one. The flow & sound numbers posted here tell me it must be pretty darn quiet while still flowing very well. Are you using 5" anywhere else in your system or just reducers for the muffler?
Did your kitty test pipe take care of changing the angle for a straight system, if so what brand is it?
Did your kitty test pipe take care of changing the angle for a straight system, if so what brand is it?
#37
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I installed a donaldson m120100 a while back. It has the same flow as the 4" version of the 51" donaldson that many are using, but is a direct replacement of the stock muffler (just need to weld on hangers). I think that if someone were to install it on your truck without you knowing, you probably wouldn't notice the difference in sound over the stock muffler. It seems to be just a little deeper outside the truck, while allowing a little more turbo whistle through. Off boost response has improved a bit. This looks like a good muffler for the guys that want better flow and performance, without the additional noise. ![Cool](https://www.dieseltruckresource.com/forums/images/smilies/cool.gif)
Mike
![Cool](https://www.dieseltruckresource.com/forums/images/smilies/cool.gif)
Mike
#39
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I have the Aero with the stacks and it is loud in side the cab. Has any one herd how the Hush Power muff is?? I seen there both in Kentucky that guy said he had the best one on the market. NO drone in the cab??
what do you think??
what do you think??
#40
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Mike
#41
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Muffler option
L8r,..........dogger
Last edited by dogger; 06-06-2008 at 06:55 AM. Reason: Correction
#42
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Fleetpride Dealers
Anyone looking for a Donaldson or Nelson type muffler should check for a local Fleetpride Dealer.
Here are Flow rates from Donaldson on some of the mufflers discussed here. Also a cross reference chart from a Fleetpride catalog.
Here are Flow rates from Donaldson on some of the mufflers discussed here. Also a cross reference chart from a Fleetpride catalog.
#43
On the other hand maybe the oem muffler ain't so bad for low noise & decent flow.
The M085421 is a 40" oval muffler spec'd for the 5.9 Cummins, 6.6 Dura and 7.3 Nav with better flow numbers than the popular 51" M090544.
I wonder if that M085421 is the oem muffler or is built the same as oem?
The M085421 is a 40" oval muffler spec'd for the 5.9 Cummins, 6.6 Dura and 7.3 Nav with better flow numbers than the popular 51" M090544.
I wonder if that M085421 is the oem muffler or is built the same as oem?
#44
Here's a 5"in/5"out on ebay for $53.
http://cgi.ebay.com/ebaymotors/M1004...temZ4614188401
Anyone think that would work well?
http://cgi.ebay.com/ebaymotors/M1004...temZ4614188401
Anyone think that would work well?
#45
M050944 is the 4" in 4 " out part number for the 51" with perforated baffle on the Donaldson muffler if I recall. I am extremely pleased with mine, no drone, no cat, and the 6" tip makes a little deeper note OUTSIDE of the cab.
Wood
Wood