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Old 05-02-2014, 03:40 PM   #1
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Default quieting onan 2800 with resonator

although this may have been posted before I though this might be helpful to people with onan 2800



[youtube:2duaqc9c]gQboSPqKtfE[/youtube:2duaqc9c]
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Old 05-02-2014, 05:22 PM   #2
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Default Re: quieting onan 2800 with resonator

That sounded like an improvement, at least over my computer speakers. I see that a few people asked how much and where to buy but no response from the guy. I might have to look into one of those as I hate the sound of my 2.8, maybe at Napa or muffler shop.
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Old 05-02-2014, 05:32 PM   #3
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Default Re: quieting onan 2800 with resonator

amazon

http://www.amazon.com/Cummins-Power-Gen ... +resonator


adventure rv

http://www.adventurerv.net/onan-exhaust ... -5144.html

dyers

http://www.dyersonline.com/cummins-onan ... nator.html
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Old 05-02-2014, 06:21 PM   #4
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Default Re: quieting onan 2800 with resonator

Thank-you!
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Old 05-02-2014, 06:59 PM   #5
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Default Re: quieting onan 2800 with resonator

That is the standard Onan resonator that we put on ours. It doesn't really make it much quieter from DB standpoint, but it makes the noise much less harsh and irritating. Definitely worth the money and effort to install IMO.
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Old 05-02-2014, 07:19 PM   #6
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Default Re: quieting onan 2800 with resonator

Quote:
Originally Posted by booster
That is the standard Onan resonator that we put on ours. It doesn't really make it much quieter from DB standpoint, but it makes the noise much less harsh and irritating. Definitely worth the money and effort to install IMO.

do you also use the Super trapp 3s with it that i've seen reccomended?


this rvnet post has some pictures of both

http://www.rv.net/forum/index.cfm/fusea ... 281511.cfm
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Old 05-02-2014, 07:49 PM   #7
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Default Re: quieting onan 2800 with resonator

Quote:
Originally Posted by gerrym51
Quote:
Originally Posted by booster
That is the standard Onan resonator that we put on ours. It doesn't really make it much quieter from DB standpoint, but it makes the noise much less harsh and irritating. Definitely worth the money and effort to install IMO.

do you also use the Super trapp 3s with it that i've seen reccomended?


this rvnet post has some pictures of both

http://www.rv.net/forum/index.cfm/fusea ... 281511.cfm
We never tried the Supertrap. Read a bunch about it, primarily when Rodger was messing with his and moderator on RV.net. Always looked like mixed results with the possibility of increased back pressure or other issues with the Onan system. Onan makes a big deal about non Onan parts in the exhaust, but I really haven't heard of any failures in modified ones to this point. And Onan has never said if the exhaust is tuned to the rpm, which might mean even a pipe longer or shorter might be an issue. I do believe they are a bit over cautious.

I think before we would add more mufflers of whatever kind, I would do some sort of Genturi system to get the noise and fumes up and away. Ours exits out the back now, and aims a bit down, both of which seem to help. along with the resonator. It is still noisy to try to sleep with the genny and AC on, though.
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Old 05-02-2014, 07:55 PM   #8
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Default Re: quieting onan 2800 with resonator

Quote:
Originally Posted by booster
Quote:
Originally Posted by gerrym51
Quote:
Originally Posted by booster
That is the standard Onan resonator that we put on ours. It doesn't really make it much quieter from DB standpoint, but it makes the noise much less harsh and irritating. Definitely worth the money and effort to install IMO.

do you also use the Super trapp 3s with it that i've seen reccomended?


this rvnet post has some pictures of both

http://www.rv.net/forum/index.cfm/fusea ... 281511.cfm
We never tried the Supertrap. Read a bunch about it, primarily when Rodger was messing with his and moderator on RV.net. Always looked like mixed results with the possibility of increased back pressure or other issues with the Onan system. Onan makes a big deal about non Onan parts in the exhaust, but I really haven't heard of any failures in modified ones to this point. And Onan has never said if the exhaust is tuned to the rpm, which might mean even a pipe longer or shorter might be an issue. I do believe they are a bit over cautious.

I think before we would add more mufflers of whatever kind, I would do some sort of Genturi system to get the noise and fumes up and away. Ours exits out the back now, and aims a bit down, both of which seem to help. along with the resonator. It is still noisy to try to sleep with the genny and AC on, though.
if i get a ranger-and i am leaning toward at i will use the resonator and supertrap as "slip-ons" when parked and remove while traveling-not the perfect solution but one i'm cofortable with. thanks
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Old 05-02-2014, 10:00 PM   #9
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Default Re: quieting onan 2800 with resonator

The resonator has to be welded in to work properly.
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Old 05-02-2014, 10:38 PM   #10
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Default Re: quieting onan 2800 with resonator

Quote:
Originally Posted by Caped Crusader
The resonator has to be welded in to work properly.

although some people have had pipes cut and welded onan themselves says one and 1/2 inch pipe clamp.
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