Kicking up rock sound in rear under heavy throttle? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Blizzz · 09-22-2015, 02:55 PM

I have NO idea what this is, never heard anything like it before. The car runs, and drives fine, but if i get into some heavier boosting (i'm turbo) it instantly sounds like i'm kicking up all kinds of heavy rocks into the wheel well.

Any clue? I'm going to have it checked out later this evening, but might help to have some ideas of what to look for when I get it on the lift.

EDIT: Here is a video of it: [ame="https://www.youtube.com/watch?v=9UP5V2gaO98"]BRZ weird noises - YouTube[/ame]

It sounds like it is coming from around the firewall area.

go_a_way1 · 09-22-2015, 03:10 PM

Maybe you are shreding the road with your epic boost?

humfrz · 09-22-2015, 03:18 PM

The first thing I would look for is somewhere, where a part of the exhaust system could be hitting something else .....like the frame ...

humfrz

jawn · 09-22-2015, 03:20 PM

Traction control?

murdoc · 09-22-2015, 03:22 PM

Are you getting wheelspin? It'll make them sticky and they'll pick up any gravel on the road and fling it at your fender wells?

Do you still have the stock fender plastics in?

Orr maybe your cv joints are dying haha

Blizzz · 09-22-2015, 03:30 PM

It's definitely not rocks haha.

And it will happen without wheelspin. It's not traction control. I'm thinking it might be axle or cv related... ugh.

go_a_way1 · 09-22-2015, 03:33 PM

Man that sucks. DSS rear axle time?? How much WHP are you at?

Blizzz · 09-22-2015, 03:41 PM

Quote:

Originally Posted by go_a_way1

Man that sucks. DDS rear axle time?? How much WHP are you at?

Yeah maybe i'll look into that if that's what the issue turns out to be. I'm at 440 rwhp.

go_a_way1 · 09-22-2015, 03:43 PM

Quote:

Originally Posted by Blizzz

Yeah maybe i'll look into that if that's what the issue turns out to be. I'm at 440 rwhp.

Nice!! I can see axles being an issue at that point TBH

Blizzz · 09-22-2015, 03:59 PM

Quote:

Originally Posted by go_a_way1

Nice!! I can see axles being an issue at that point TBH

Was working yesterday! The dates are off because my dashcam got reset, but I caught that yesterday: [ame="https://www.youtube.com/watch?v=5Je6ccjPZ1U"]BRZ and random biker quick pull - YouTube[/ame]

Then on the way to work today clicking, tapping etc... I just got the car back and running properly. I swear it's always something with this car.

EDIT: The clicking etc in that vid is because my windows are down, that's not audible to me as the driver. The actual sound I'm worried about is LOUD.

humfrz · 09-22-2015, 04:55 PM

Quote:

Originally Posted by Blizzz

.................. I swear it's always something with this car.................

The more you mess with the car ..... the more it will mess with you ......

an humfrz-ism

Blizzz · 09-22-2015, 11:06 PM

So it is actually not the rear axles... I wasn't able to put it on a lift today, looking more like Friday. When you put the windows up, it sounds like it is just behind the engine bay... so we're think turbo components rubbing when the engine is torquing out since that's where all those goodies are located.

go_a_way1 · 09-22-2015, 11:14 PM

So your engine is twisting from all the torque and causing things to rub?

Packofcrows · 09-23-2015, 03:37 AM

Vtec kicking in lol

Get a GoPro and record it!

09-22-2015, 02:55 PM	#1
Blizzz Member Join Date: May 2014 Drives: 2013 BRZ Location: cheshire, ma Posts: 59 Thanks: 25 Thanked 65 Times in 26 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Kicking up rock sound in rear under heavy throttle? I have NO idea what this is, never heard anything like it before. The car runs, and drives fine, but if i get into some heavier boosting (i'm turbo) it instantly sounds like i'm kicking up all kinds of heavy rocks into the wheel well. Any clue? I'm going to have it checked out later this evening, but might help to have some ideas of what to look for when I get it on the lift. EDIT: Here is a video of it: [ame="https://www.youtube.com/watch?v=9UP5V2gaO98"]BRZ weird noises - YouTube[/ame] It sounds like it is coming from around the firewall area. Last edited by Blizzz; 09-24-2015 at 01:13 PM.

09-23-2015, 03:37 AM	#14
Packofcrows hey you, yeah you <3 Join Date: Jul 2012 Drives: 2014 37J FR-S Location: Monterey County, CA Posts: 2,713 Thanks: 905 Thanked 1,257 Times in 809 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	Vtec kicking in lol Get a GoPro and record it! __________________ Got my TRD wheels and TRD louvers. Thanks!!!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Advice needed on removing rock ding on rear fender	babydriver	Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs)	4	06-26-2015 06:19 PM
Drone (Worn Wheel Bearing SOund) Sound From Rear	qbzee007	AFRICA	8	11-14-2014 02:04 AM
Sucking sound upon throttle after Magnaflow Catback install	Thrustin	Engine, Exhaust, Transmission	13	05-25-2014 03:05 AM
Metal Grind Sound when throttle blip	JDM-dono	Issues \| Warranty \| Recalls / TSB	0	11-17-2013 05:37 AM
Fix or not? OCD kicking in	slowbrz	Cosmetic Maintenance (Wash, Wax, Detailing, Body Repairs)	5	06-20-2013 04:42 PM

09-22-2015, 03:10 PM	#2
go_a_way1 Not Bаnned Anymore Join Date: Jan 2015 Drives: Heavily Modified FRS Location: Calgary, AB Posts: 9,827 Thanks: 14,918 Thanked 8,274 Times in 4,797 Posts Mentioned: 355 Post(s) Tagged: 374 Thread(s)	Maybe you are shreding the road with your epic boost?

09-22-2015, 03:18 PM	#3
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,729 Thanks: 28,551 Thanked 31,493 Times in 16,317 Posts Mentioned: 705 Post(s) Tagged: 2 Thread(s)	The first thing I would look for is somewhere, where a part of the exhaust system could be hitting something else .....like the frame ... humfrz

09-22-2015, 03:20 PM	#4
jawn Senior Member Join Date: Jun 2015 Drives: 2015 CWP BRZ Limited Location: NOVA Posts: 2,800 Thanks: 1,801 Thanked 3,946 Times in 1,757 Posts Mentioned: 105 Post(s) Tagged: 7 Thread(s)	Traction control?

09-22-2015, 03:22 PM	#5
murdoc Sometimes I'm wrong. Join Date: Mar 2013 Drives: '13 FR-S/'96 240SX Location: Frederick, MD Posts: 366 Thanks: 91 Thanked 316 Times in 152 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Are you getting wheelspin? It'll make them sticky and they'll pick up any gravel on the road and fling it at your fender wells? Do you still have the stock fender plastics in? Orr maybe your cv joints are dying haha

09-22-2015, 03:30 PM	#6
Blizzz Member Join Date: May 2014 Drives: 2013 BRZ Location: cheshire, ma Posts: 59 Thanks: 25 Thanked 65 Times in 26 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It's definitely not rocks haha. And it will happen without wheelspin. It's not traction control. I'm thinking it might be axle or cv related... ugh.

09-22-2015, 03:33 PM	#7
go_a_way1 Not Bаnned Anymore Join Date: Jan 2015 Drives: Heavily Modified FRS Location: Calgary, AB Posts: 9,827 Thanks: 14,918 Thanked 8,274 Times in 4,797 Posts Mentioned: 355 Post(s) Tagged: 374 Thread(s)	Man that sucks. DSS rear axle time?? How much WHP are you at?

09-22-2015, 11:06 PM	#12
Blizzz Member Join Date: May 2014 Drives: 2013 BRZ Location: cheshire, ma Posts: 59 Thanks: 25 Thanked 65 Times in 26 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	So it is actually not the rear axles... I wasn't able to put it on a lift today, looking more like Friday. When you put the windows up, it sounds like it is just behind the engine bay... so we're think turbo components rubbing when the engine is torquing out since that's where all those goodies are located.

09-22-2015, 11:14 PM	#13
go_a_way1 Not Bаnned Anymore Join Date: Jan 2015 Drives: Heavily Modified FRS Location: Calgary, AB Posts: 9,827 Thanks: 14,918 Thanked 8,274 Times in 4,797 Posts Mentioned: 355 Post(s) Tagged: 374 Thread(s)	So your engine is twisting from all the torque and causing things to rub?

User Name		Remember Me?
Password