08-07-2022, 03:35 PM | #1 |
Drives: 22 ZL1, 18 RS3, 22 M3P Join Date: Oct 2016
Location: Walnut Creek, CA
Posts: 936
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Weird noise I'm hearing in my new zl1
Does anyone here still have a stock zl1? I'm hearing what I think is an odd noise coming from the driver's side (a passenger confirmed that it's not as evident on his side). I only notice it when I'm lightly accelerating in lower gears and the vacuum is at about 5-0. It almost sounds like a gear grinding noise. It's hard to describe...metallic-y. I don't think it is the roto-fab, but it's possible. It definitely isn't blower whine or exhaust noise. Im thinking that it could be the blower just starting to spin. In fact, I hope that's all it is. I've only had one other factory blower car and it was an 03 Cobra. I don't recall hearing anything like this on that car. Does anyone know what I'm talking about?
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2022 ZL1 - M6, Wrapped, Tinted, Rotofab intake, MBRP AxleBack, Lots of BMR rear suspension components
2022 Tesla Model 3 Performance 2018 Audi RS3 - Many mods & e85 Instagram - @JBsCars |
08-07-2022, 03:43 PM | #2 |
Drives: 19' SW ZLE Join Date: Jun 2022
Location: Austin
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Is the sound loud enough to where you think you are able to get it on video?
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Summit White 2019 Camaro ZL1 1LE
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08-07-2022, 03:44 PM | #3 |
Drives: 22 ZL1, 18 RS3, 22 M3P Join Date: Oct 2016
Location: Walnut Creek, CA
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I tried but it's not too clear. The wind and other cars kinda mask it. I can post the video anyway, but not sure how to post it anywhere anymore...
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2022 ZL1 - M6, Wrapped, Tinted, Rotofab intake, MBRP AxleBack, Lots of BMR rear suspension components
2022 Tesla Model 3 Performance 2018 Audi RS3 - Many mods & e85 Instagram - @JBsCars |
08-07-2022, 04:26 PM | #4 |
Drives: 2023 ZLE M6 Join Date: Jun 2022
Location: California
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Easiest way is upload to YouTube. They make it pretty simple.
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2023 ZLE M6 Borla S-Type Catback | Rotofab CAI | Soler TB | MPI Lid |
08-07-2022, 05:54 PM | #5 |
Drives: 2017 Focus RS Join Date: Dec 2021
Location: TX
Posts: 63
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Does it make the noise if you are not in gear and rev the motor. There was another post recently that his intake bolts holding in TB was loose making a weird noise.
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2023 ZL1, M6, Shadow Gray
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08-07-2022, 06:05 PM | #6 |
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Drives: 21 ZL1 Join Date: Feb 2022
Location: South East
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What you are hearing is what everyone with a ZL1 and rotofab eventually complains about. When you are mildly accelerating, you are hearing the whistling of air going through the bypass valve in the blower. When you give it enough beans where the bypass closes and you start to register boost, thats when it stops.
Completely normal and nothing you can do about it. Edit - with a closed air intake like the stock one, you wouldn't hear this. So when the rotofab goes on, its introduced. My 18 did it with the rotofab and my 21 does it same with the RF. My buddy's 20 with the rotofab does it as well. I've heard this on at least 5 ZL1s with rotofabs. |
08-07-2022, 09:10 PM | #7 | |
Drives: 22 ZL1, 18 RS3, 22 M3P Join Date: Oct 2016
Location: Walnut Creek, CA
Posts: 936
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Quote:
Ok. Yea, I put the rotofab on at like 50 miles so I can't be certain it was doing it before the install. I'll check the tb bolts too, like Justin suggested. I will say, though, that if this is normal it's a pretty annoying sound. I just want pure blower whine and exhaust noise
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2022 ZL1 - M6, Wrapped, Tinted, Rotofab intake, MBRP AxleBack, Lots of BMR rear suspension components
2022 Tesla Model 3 Performance 2018 Audi RS3 - Many mods & e85 Instagram - @JBsCars |
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08-07-2022, 10:02 PM | #8 |
Drives: 2003 Monte Carlo SS SLP, 2022 ZL1 Join Date: Aug 2021
Location: Los Angeles, CA
Posts: 484
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Damn I have a rotofab I've yet to install and never heard of anyone complaining about strange noises other than when installed incorrectly. This blows to read if it's really a thing.
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08-07-2022, 10:21 PM | #9 |
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Yeah its pretty common. See below.
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08-07-2022, 10:23 PM | #10 |
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This is exactly what mine does as well. Thats the bypass whistle you can now hear with the open element CAI. RIP to your hopes and dreams.
https://www.youtube.com/watch?time_c...ature=emb_logo |
08-07-2022, 10:23 PM | #11 |
Drives: 2003 Monte Carlo SS SLP, 2022 ZL1 Join Date: Aug 2021
Location: Los Angeles, CA
Posts: 484
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08-07-2022, 10:27 PM | #12 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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I have a RotoFab intake too and have never really noticed any noise like that before but hey I figure I’m driving a 650 hp hotrod so I won’t be that concerned about it. I do like the whine though on full throttle!
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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08-07-2022, 10:27 PM | #13 |
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As I said above though this is only when you are accelerating while still in vacuum. If you completely close the bypass by going WOT, it stops immediately and you only hear pure blower whine. Heres my car going WOT and you can hear it scream now with the rotofab.
https://youtu.be/ZDJNSV2v74c |
08-07-2022, 10:30 PM | #14 |
Drives: 2017 Camaro ZL1 Coupe Join Date: May 2016
Location: Georgia
Posts: 5,813
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Hey Mac, don’t let that noise stop you from installing your RotoFab! They do make some difference in throttle response and blower whine.
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ZL1 Coupe, PDR, Exposed carbon fiber hood insert, My Link with Nav, M6 6 speed and Silver Ice Metallic. Mods done: ceramic window tint, GM Accessories Camaro floor mats and Roto-Fab CAI.
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