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Old 01-29-2010, 10:33 AM   #15
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Thanks to all for the help.
I finally traced the history of this muffler. Cummins is in the muffler business after all.
Monaco purchased this muffler from Cummins NorthWest.
Cummins Part #: 201970N, 5” in/out. Cummins Northwest said that it is a combination catalytic converter/muffler.
Monaco Part #: 01808047
Muffler was manufactured by Fleetguard Nelson, which now is part of Cummins Emissions Solutions.
Again thanks for the help.
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Old 01-29-2010, 01:05 PM   #16
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Jon
you wouldn't happen to be working on a dpf bypass or enhancement for the late build isc engines would you
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Old 01-29-2010, 02:22 PM   #17
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powerboatr,

Removing the DPF system and reprogramming the computer is something that some places are doing on the light duty pickup trucks and getting huge gains in both power and mileage but for one it is illegal unless the vehicle is for off road use only and two it will void your engine warranty so I'm sure most RV owners would not be receptive to doing that sort of modification. As far as doing some upgrades to the exhaust after the DPF system, like I said earlier we just have not had any here that we can do any R&D on...I'm sure as they become more common we will have something for them.
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Old 01-29-2010, 03:39 PM   #18
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Quote:
Originally Posted by JonBrazel View Post
powerboatr,

Removing the DPF system and reprogramming the computer is something that some places are doing on the light duty pickup trucks and getting huge gains in both power and mileage but for one it is illegal unless the vehicle is for off road use only and two it will void your engine warranty so I'm sure most RV owners would not be receptive to doing that sort of modification. As far as doing some upgrades to the exhaust after the DPF system, like I said earlier we just have not had any here that we can do any R&D on...I'm sure as they become more common we will have something for them.
thanks Jon
yep certifying the rv as OFF road only is a bit tricky. farm vehicle is easy
on our setup the "after" the dpf is a bit of 90 degree bend and then air
the 55 gallon drum pretty much is all that under there.
i was earlier looking at a bypass for certain conditions, IE long grade climbs, standing starts at high atlitudes, ( but that would negate the no smoke), just a little help under those taxing situations.
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Old 01-29-2010, 04:03 PM   #19
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Jon,
Have you ever dyno'd an ISM500 with the AeroTurbine muffler vs just a straight exhaust to compare noise and hp/torque gain? I used to have an older 8.3 mechanical Cummins that was hardly any noisier with just a straight pipe. If you've tested, what gains did you see with the AeroTurbine over the stock muffler on an ISM500?
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Old 01-29-2010, 04:24 PM   #20
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We've never done a back to back AeroTurbine vs. straight pipe comparison in noise or power but I did have a customer that had a 8.3 with a Banks PowerPack and straight pipe and we got him set up with an Aero and he said he noticed less noise and better MPG with the Aero over the straight pipe, but not much power difference (this could also be because he already was running the Banks PowerPack).

The noise output over stock is not very noticeable, although the tone is different. It makes the exhaust note deeper with more bass which all of our customers seem to like better anyways. Once underway you will not notice any difference in noise output.

Gains on the ISM are approx. 30 HP and 70 Tq. over stock.
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Old 01-30-2010, 07:52 AM   #21
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Jon,

Is the MBRP mufffler 2050 an 'open' muffler? Or is it more comparable to the stock muffler?

The reason I ask is because it is almost a direct replacement, size wise, for my stock ISC muffler. And if it is, I would prefer that over the AERO.
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Old 01-31-2010, 09:20 AM   #22
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Jon, what part of the country are you located in and how long does a typical installation take? Since we full time, can you support over night parking if required? I'm really interested in this upgrade.
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Old 01-31-2010, 10:54 PM   #23
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ua40j,

I'm not sure as we have never dealt with MBRP's universal mufflers, only there full exhaust line for light duty pickups. I do know that the technology built into the AeroTurbine is unique compared to all other mufflers and that it works very well.

Roadking,

Our facility is located in the Pacific Northwest in Centralia, Wa. We do have our own RV park adjacent to our shop. You can check us out at our web address www.brazelsrv.com

You can also check out our dealer locations if we are too far away to come directly to us.

Installation time can vary greatly, but on average after all the stock components are removed and the new muffler and piping is routed, clamped and welded together I would say ballpark 2 hours. Some are quicker and some can take much longer, just depends on the configuration.
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Old 03-26-2010, 09:38 PM   #24
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Well, I ordered the MBRP M2050 performance muffler. Got it awhile back and imagine my surprise when I looked in one end and didn't see anything till the other end. Almost completely smooth inside except for rows of little quarter size openings along the inside bore.

Went to install it and found out I didn't have the right tools to make new brackets so I took it a truck place near me and they installed it for a few bucks.

Picked it up and the sound was a lot like my stock Impala SS. Light rumble at idle, throaty at high rpm. But not bad.

Immediately noticed quicker boost and cooler engine (had to drive 50 miles home). Will report on other benefits/issues after Easter. Making a trip then.
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Old 03-27-2010, 10:56 AM   #25
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Are you saying it was a straight thru muffler? I'm thinking about the 5050L for my Essex. For $191 a stainless muffler, you can't beat that.
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Old 03-27-2010, 11:33 AM   #26
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I beat it. Found it on E-Bay for $141.
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Old 03-27-2010, 12:08 PM   #27
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Yes, the MBRP M2050 is a straight through muffler. I paid $125 total including shipping.

The 'muffling' bumps inside the muffler are twisted in a spiral. This, I believe, can create some type of spin that the system can use to accelerate exhaust out the back.

Not an engineer, but it seems logical.
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Old 04-04-2010, 03:26 PM   #28
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Well, we made our first trip with the new MBRP m2050 muffler. First thing you notice is the throaty rumble when hard accelerating. Not too bad....at least in my opinion. Wife didn't complain.

Other things I noticed:

1. Better performance in 2nd through 4th gears. Not so much in 1st, but once we hit 2nd, it really too off....for a motorhome, that is.
2. Cooler operation. Not so much while driving, but definitely while at stop lights and in the parking lot when manuevering. Engine temps didn't climb as fast as before.
3. More noticeable turbine whine. Don't know why.
4. Perception of better fuel economy. We traveled the same route we always take to a casino we go to and I noticed that the in route fuel economy was a little better than normal. By that I mean...7.5 instead of 7.3. Got a longer trip in May that will prove out the economy part. Did notice on a couple of hills that instead of seeing 3.75mpg, I got 4.0. Not scientific at all and my perception could just be my excitement at the performance.
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