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Operator Commanded Regen Noises

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Old Mar 1, 2023 | 11:24 AM
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Operator Commanded Regen Noises

I just did an OCR and it sounded awful at times. Is this normal?


The video starts with the noise and ends with it. It would make this noise pretty consistently throughout, maybe every minute or so as it revs up.
 
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Old Mar 1, 2023 | 12:29 PM
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Yeah, mine doesn't do that, but I also never do stationary regens. Is one of the fan blades hitting something maybe?
 
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Old Mar 1, 2023 | 09:08 PM
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Originally Posted by hooper303
I just did an OCR and it sounded awful at times. Is this normal?

https://youtu.be/qdHadTvWLZ8

The video starts with the noise and ends with it. It would make this noise pretty consistently throughout, maybe every minute or so as it revs up.
Not normal. I have done three stationary OCR and all my truck does is rev higher. Did you sit in the truck & watch your temp guage to see it that is happening when the fan turns on?
 
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Old Mar 2, 2023 | 08:47 AM
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I pretty much only do OCR's and that noise is not suppose to be there. The OCR's on the 2020+ trucks are so much quieter than the earlier models. My 2017 would rev to 2k and the fan would be a full duty cycle the entire time making it sound like it was going to take off. The newer one rev to like 1600 or so and the fan is not engaged near as much.
 
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Old Mar 2, 2023 | 12:15 PM
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Sounds like turbo flutter
 
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Old Mar 2, 2023 | 12:33 PM
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Fixed the link for ya. And like others have stated, definitely not normal

 
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Old Mar 6, 2023 | 09:55 AM
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Originally Posted by ToMang07
Sounds like turbo flutter
Interesting. I had the engine brake on before I started this. Wonder if that is the issue.
 
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Old Mar 6, 2023 | 09:59 AM
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Originally Posted by gSwift
Fixed the link for ya. And like others have stated, definitely not normal

Thank you! I posted this from my phone.
 
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Old Mar 6, 2023 | 10:01 AM
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Originally Posted by cpobst
I pretty much only do OCR's and that noise is not suppose to be there. The OCR's on the 2020+ trucks are so much quieter than the earlier models. My 2017 would rev to 2k and the fan would be a full duty cycle the entire time making it sound like it was going to take off. The newer one rev to like 1600 or so and the fan is not engaged near as much.
Have you ever done one with the engine brake on?
 
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