Making my onboard generator quieter

Very interesting demonstration. TY for posting.

The title of this post is deceiving. The difference is insignificant. Not worth the money as far as I can tell.
My Generac 65G is pretty quiet. It is mounted wrong and resonates through the chassis which makes it louder inside than outside.

I installed the same resonator on the earlier non-inverter model of the Onan 2500LP (runs at a constant 3600 rpm). The exhaust on mine has a "poot-poot" sound that was annoying, and after installing the resonator, the volume of the sound was not appreciably reduced, but the TONE was changed, and the "poot-poot" sound was pretty much gone.

Installing it on the new inverter model Onan 2500i probably has less effect as the engine generally runs slower (2445-2900 rpm) and never gets close to the 3600 that a non-inverter generator runs at.

Here is a video that I did showing the difference on my trailer. YT messed me up by converting it to a "short" so all of the description of what it is and why is not visible to the viewer unless they click the three vertical dots in the upper RH corner and select "description". I will have to eventually edit the video to longer than a minute by adding some BS at the beginning and end but for now you are stuck with looking at a 40 second short.

https://youtube.com/shorts/NQEtWhQr8ps?feature=share

I have since cut out a section of the pipe under the trailer and welded the resonator in place.

Charles

CharlesinGA,
Good demo! Thanks.:)
Barney

Agreed! CharlesinGA provided a great example of the improved sound. I would opt for that mod in a heartbeat.

Fulltimers wrote:
The title of this post is deceiving.

It's not deceiving at all. Watch the video and you can see that the resonator did indeed reduce the sound.

So the Inverter model, despite running slower and having a completely different motor, has, under load, that same chugging or Poot-poot sound that my non inverter model has, and that resonator seems to have about the same effect on your inverter model as on my older non-inverter model.

I took my pipe to a one man muffler shop and he welded up some cracks in the 90 degree bend of the pipe caused by a broken hangar in the past, and he cut out a section and welded in the resonator.

I had bought the resonator to install on my 3600LP generator in a motorhome I had, but everyone who had tried it said it simply didn't have any noticeable change in sound so I never bothered to install it. After I got my trailer and realized the sound the smaller 2500LP made I tried it and that is what you see in my short video. That led me to install it and in that process I discovered cracks in the pipe at the 90 coming out of the motor from a broken hangar that had been repaired using inner tube or similar rubber that left a lot to be desired. As I also had the proper Cummins hanger, new, I bought with the resonator, I changed it out and fixed everything.

Charles

Nice upgrade, thanks for sharing.

Granted its only a video, while the meter may have determined the resonator made a difference. I could not hear much of a difference listening to the video.
I found the difference to be minimal at best. Not enough to make a difference or change my camping scenario

Sure seems to make the sound more acceptable.