Strange noise at 2500 RPM - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

midnight23 · 06-05-2013, 08:11 PM

I'm getting a strange grinding noise noise everytime I pass 2500RPM in any gear, is anyone else having an issue like this? it only happens between 2500-2600 RPM.

current mods are uel headers, full header back, perrin drop in and tune.

xjohnx · 06-05-2013, 08:17 PM

Video would help

sw20kosh · 06-05-2013, 08:35 PM

Sounds like you have an exhaust frequency at that RPM that is vibrating something like a heat shield or a loose bolt or etc. It is probably the exhaust considering that is what you changed out.

troek · 06-06-2013, 02:05 AM

thats my guess as well. alot of people have had a problem with the heat shield over the stock muffler area.

FRSBRZGT86FAN · 06-06-2013, 05:49 PM

I'm going to agree with these other genius's here. I am pretty sure it has to do with the exhaust system upgrade (a video or sound clip would help by the way). A lot of people complained about squeaks and grinds after full exhaust or catback exhaust upgrades, meaning something can take the extra vibrations or noise and just decides to rattle away. Also does this happen at a stand still in neutral? it could help you to diagnose the location of the rattle/grind. I wouldn't doubt there's a fix on here somewhere because you are not the only person with this issue. Also where exactly does the sound emanate from?
everyone on here will be sure to help you out

xjohnx · 06-07-2013, 08:40 AM

maybe a rattle, but i've never heard an exhaust cause anything close to what I would describe as a "grind" like OP described.

troek · 06-07-2013, 09:58 AM

ive heard a very distinct grinding noise caused by some exhausts and the oem heat shield over the muffler. theres a youtube video of it somewhere, but im having trouble finding it.

edit: found it.
[ame="http://www.youtube.com/watch?v=cujLV7coC1I"]frs j2 exhaust quad tip - YouTube[/ame]

TM · 06-07-2013, 10:01 AM

I sometimes hear a metal rattle/grind on my car (all stock) at around 1.5-2k on lower gears, but I thought maybe i'm just lugging the engine and just shift at a higher RPM now.

06-05-2013, 08:11 PM	#1
midnight23 dying bird under the hood Join Date: Mar 2013 Drives: 2013 SWP Limited BRZ Location: Disneyland, California Posts: 1,331 Thanks: 546 Thanked 451 Times in 295 Posts Mentioned: 34 Post(s) Tagged: 0 Thread(s)	Strange noise at 2500 RPM I'm getting a strange grinding noise noise everytime I pass 2500RPM in any gear, is anyone else having an issue like this? it only happens between 2500-2600 RPM. current mods are uel headers, full header back, perrin drop in and tune. __________________ GReddy Turbo BRZ tuned by Evasive Motorsports Build Thread Instagram

06-06-2013, 05:49 PM	#5
FRSBRZGT86FAN Senior Member Join Date: Jun 2013 Drives: 2023 GR SUPRA,15 FR-S (SOLD) Location: Philadelphia, PA Posts: 4,234 Thanks: 3,087 Thanked 2,101 Times in 1,397 Posts Mentioned: 31 Post(s) Tagged: 2 Thread(s)	I'm going to agree with these other genius's here. I am pretty sure it has to do with the exhaust system upgrade (a video or sound clip would help by the way). A lot of people complained about squeaks and grinds after full exhaust or catback exhaust upgrades, meaning something can take the extra vibrations or noise and just decides to rattle away. Also does this happen at a stand still in neutral? it could help you to diagnose the location of the rattle/grind. I wouldn't doubt there's a fix on here somewhere because you are not the only person with this issue. Also where exactly does the sound emanate from? everyone on here will be sure to help you out __________________ SOLDOFT Stage 2 UEL E85/Nameless Performance 3 inch axleback with 5 inch mufflers/ TRD CAI / CNT UEL/ Cusco Strut BAR & LHD Brake Stop / "JDM" Toyota Badges / WinJet JDM headlights - DRL MOD from fteightysix.com - 5000K Diode Dynamics HID kit / Diode Dynamics LED interior Lights and sidemarker bulbs / JDM Clear Sidemarkers / Diode Dynamics LED switchbacks/ OLM LED rear turn signals / Tap Turn RelaySOLD

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06-05-2013, 08:17 PM	#2
xjohnx Grip>Slip Join Date: Jun 2012 Drives: 13 SWP BRZ Ltd - Innovate Powered! Location: RVA Posts: 3,563 Thanks: 656 Thanked 1,717 Times in 1,031 Posts Mentioned: 45 Post(s) Tagged: 3 Thread(s)	Video would help

06-05-2013, 08:35 PM	#3
sw20kosh Senior Member Join Date: Jul 2012 Drives: 2013 Black FR-S Location: SF Posts: 3,030 Thanks: 881 Thanked 2,014 Times in 990 Posts Mentioned: 153 Post(s) Tagged: 1 Thread(s)	Sounds like you have an exhaust frequency at that RPM that is vibrating something like a heat shield or a loose bolt or etc. It is probably the exhaust considering that is what you changed out.

06-07-2013, 08:40 AM	#6
xjohnx Grip>Slip Join Date: Jun 2012 Drives: 13 SWP BRZ Ltd - Innovate Powered! Location: RVA Posts: 3,563 Thanks: 656 Thanked 1,717 Times in 1,031 Posts Mentioned: 45 Post(s) Tagged: 3 Thread(s)	maybe a rattle, but i've never heard an exhaust cause anything close to what I would describe as a "grind" like OP described.

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