FRS Fluttery chirp rattle thing - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

rbousfield3 · 12-08-2024, 03:57 AM

Howdy gang. I split the bellow/flex pipe of my header open so I got a new flex pipe welded in. I will note that the welds are good and there are no leaks from the header. After I got the new FP welded on, it sounds tremendously more correct than it did with a hole in the header, but there’s now a weird almost fluttery sound. I’ll see what I can do about attaching a clip. I mostly want to believe this is attributed to the new flex pipe, as change made->new sound (logically). It could be the sound of the exhaust gasses hitting the thin stainless, or it could be worse. I figured I’d just run it by the think tank first. (It also could potentially be the d4s stuff but I don’t think so). Sound is only really there when engine is under load of accelerating/maintaining speed unless I’m super gentle. Not higher revs like above 4-4.5k though.

2015 frs
Edelbrock SC on flex fuel
Header is PLM

https://youtube.com/shorts/KeLGqnQjt...4PXCl76FgYqshy

Flutter sound at 3 second mark and 5 second mark (1st and 2nd)

RToyo86 · 12-13-2024, 10:33 AM

I'd consider a new header. PLM are bottom barrel in terms of quality. No Current headers use flex pipes as they always fail.

Gruppe-s, MXP, GUMotorsport are inexpensive options. Or find used tomei.

NoHaveMSG · 12-14-2024, 03:12 PM

Flutter and chirp sounds like exhaust leak.

12-08-2024, 03:57 AM	#1
rbousfield3 Junior Member Join Date: Dec 2024 Drives: Edelbrock Supercharged 2015 FRS Location: Tucson Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	FRS Fluttery chirp rattle thing Howdy gang. I split the bellow/flex pipe of my header open so I got a new flex pipe welded in. I will note that the welds are good and there are no leaks from the header. After I got the new FP welded on, it sounds tremendously more correct than it did with a hole in the header, but there’s now a weird almost fluttery sound. I’ll see what I can do about attaching a clip. I mostly want to believe this is attributed to the new flex pipe, as change made->new sound (logically). It could be the sound of the exhaust gasses hitting the thin stainless, or it could be worse. I figured I’d just run it by the think tank first. (It also could potentially be the d4s stuff but I don’t think so). Sound is only really there when engine is under load of accelerating/maintaining speed unless I’m super gentle. Not higher revs like above 4-4.5k though. 2015 frs Edelbrock SC on flex fuel Header is PLM https://youtube.com/shorts/KeLGqnQjt...4PXCl76FgYqshy Flutter sound at 3 second mark and 5 second mark (1st and 2nd)

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12-13-2024, 10:33 AM	#2
RToyo86 Senior Member Join Date: Mar 2018 Drives: 17 Asphalt 86 Location: Ottawa Posts: 2,391 Thanks: 1,885 Thanked 2,636 Times in 1,288 Posts Mentioned: 16 Post(s) Tagged: 0 Thread(s)	I'd consider a new header. PLM are bottom barrel in terms of quality. No Current headers use flex pipes as they always fail. Gruppe-s, MXP, GUMotorsport are inexpensive options. Or find used tomei.

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