3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
I've got to start his post with a half-way apology to Floyd (Old & Slow) for my defense of what he called an added "echo chamber" on the new Champion generators that are CARB compliant.
The air induction device does indeed add noise to the generator. But, I would not in any way call it an "Echo Chamber".
Today I decided to investigate the air induction unit further. Low and behold, covering the assorted holes on the device made the generator quieter. The strange part is that covering the holes did not effect the sound level as you moved further away from the generator - the biggest change was close up.
Truthfully, it is more of a change in tone -- but it is a change that I like.
Now, here is the kicker. The added device is required by the California Air Resources Board as part of it's emissions reduction mandate for small spark ignition engines. There is something "sort of like" a catalytic converter inside the muffler. I do not know how it is constructed - but it does require added air (oxygen) to operate properly.
Since this is a CARB required device rather than an EPA device it is conceivable that one could simply remove the lower part with the assorted holes in it and put on a simple home made block off plate to seal the tube up. But, I do not know what the long term effects would be on the innards where the converter thing is.
Another option for non-California owners that find the added noise objectionable is to order a standard muffler from CPE. They are relatively cheap - it is the shipping that could add up.
If you own one of these CARB compliant generators you really need to watch and listen to the video I uploaded to YOU TUBE. It is not a public video, you must have the URL from this posting to view it.
I understand that CPE is investigating alternatives for the air intake device. Maybe a change will be coming soon.
In the mean time..... well, that is up to you.
And Floyd, you were partly correct. Some noise does come from the added device. I apologize for hitting you so hard on your observation. But, it ain't no echo chamber! Cut and paste the following link into your browser if this this does not work.
http://www.youtube.com/watch?v=0JYBBi8dcX8
The air induction device does indeed add noise to the generator. But, I would not in any way call it an "Echo Chamber".
Today I decided to investigate the air induction unit further. Low and behold, covering the assorted holes on the device made the generator quieter. The strange part is that covering the holes did not effect the sound level as you moved further away from the generator - the biggest change was close up.
Truthfully, it is more of a change in tone -- but it is a change that I like.
Now, here is the kicker. The added device is required by the California Air Resources Board as part of it's emissions reduction mandate for small spark ignition engines. There is something "sort of like" a catalytic converter inside the muffler. I do not know how it is constructed - but it does require added air (oxygen) to operate properly.
Since this is a CARB required device rather than an EPA device it is conceivable that one could simply remove the lower part with the assorted holes in it and put on a simple home made block off plate to seal the tube up. But, I do not know what the long term effects would be on the innards where the converter thing is.
Another option for non-California owners that find the added noise objectionable is to order a standard muffler from CPE. They are relatively cheap - it is the shipping that could add up.
If you own one of these CARB compliant generators you really need to watch and listen to the video I uploaded to YOU TUBE. It is not a public video, you must have the URL from this posting to view it.
I understand that CPE is investigating alternatives for the air intake device. Maybe a change will be coming soon.
In the mean time..... well, that is up to you.
And Floyd, you were partly correct. Some noise does come from the added device. I apologize for hitting you so hard on your observation. But, it ain't no echo chamber! Cut and paste the following link into your browser if this this does not work.
http://www.youtube.com/watch?v=0JYBBi8dcX8
