Stupid Question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

WNDSRFR · 05-06-2023, 10:43 AM

What is this thing?
I was sitting at a traffic light watching cars go by and noticed that most cars have this thing. What is it? What does it do? Why do most cars have it? Is it aerodynamic? It must have a purpose. What is it?

Spuds · 05-06-2023, 11:03 AM

Quote:

Originally Posted by WNDSRFR

What is this thing?
I was sitting at a traffic light watching cars go by and noticed that most cars have this thing. What is it? What does it do? Why do most cars have it? Is it aerodynamic? It must have a purpose. What is it?

It's a spoiler. Reduces drag by deflecting airflow away from the wheel well.

DarkPira7e · 05-06-2023, 11:43 AM

It's the ground for the DI ECU that everyone forgets to bolt down.

WNDSRFR · 05-06-2023, 12:02 PM

Quote:

Originally Posted by Spuds

It's a spoiler. Reduces drag by deflecting airflow away from the wheel well.

I thought you were kidding. But after taking a good look at it, I think you're right. Can't think of any other reason for it's existence. Does it have a name? And if Toyobaru is so concerned about drag, then why doesn't the car come with a rear spoiler?

WNDSRFR · 05-06-2023, 12:12 PM

Looks like I'm not the only one bewildered by this. I just googled "what is flap in front of rear wheel ?" Alot of people want to know.

I'm glad I'm not the only one.

Spuds · 05-06-2023, 12:26 PM

Quote:

Originally Posted by WNDSRFR

I thought you were kidding. But after taking a good look at it, I think you're right. Can't think of any other reason for it's existence. Does it have a name? And if Toyobaru is so concerned about drag, then why doesn't the car come with a rear spoiler?

Search for wheel deflector. Verus actually makes a kit for the front.
https://www.verus-engineering.com/sh...gt86-350#attr=

Mine did. It reduces drag coefficient by a bit iirc.

Sapphireho · 05-06-2023, 12:29 PM

Toyota calls the one on our cars a stone guard.

LancePower · 05-06-2023, 05:08 PM

New cars need all these fancy aero tricks to get much worse gas milage than cars did 30 years ago.

Progress!

soundman98 · 05-06-2023, 06:33 PM

just remember kids. never let reality get in the way of a good story!

WNDSRFR · 05-07-2023, 07:38 AM

Quote:

Originally Posted by Sapphireho

Toyota calls the one on our cars a stone guard.

A Stone Guard? Really?
How in the hell does this rubber thing guard against stones?

I don't think Toyota knows what it's for.

blsfrs · 05-07-2023, 10:23 AM

Ain't Google great.
https://www.linkedin.com/pulse/aerod...-vesa-tiainen/

WNDSRFR · 05-07-2023, 10:57 AM

Great explanation. It all makes sense now.

But what do stones have to do with it?

Tcoat · 05-07-2023, 03:48 PM

Quote:

Originally Posted by WNDSRFR

Great explanation. It all makes sense now.

But what do stones have to do with it?

This. This is what stones have to do with it. When the wheel flings stones it pushes them down instead of blasting the corner of the quarter off.

JD001 · 05-08-2023, 09:21 AM

Quote:

Originally Posted by Tcoat

This. This is what stones have to do with it. When the wheel flings stones it pushes them down instead of blasting the corner of the quarter off.

I'm just thinking out loud, if you leave the dirt on the sidewalls, seed some moss, a bit of TLC, you'll have a tyre colour that matches the rest of your motor.

What have you been doing to collect 'rally' style dirt?

05-06-2023, 10:43 AM	#1
WNDSRFR Senior Member Join Date: Jan 2014 Drives: FR-S,GTI Location: Cocoa, Florida Posts: 1,155 Thanks: 228 Thanked 823 Times in 419 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Stupid Question What is this thing? I was sitting at a traffic light watching cars go by and noticed that most cars have this thing. What is it? What does it do? Why do most cars have it? Is it aerodynamic? It must have a purpose. What is it? Attached Images

05-06-2023, 11:43 AM	#3
DarkPira7e Rust bucket enthusiast Join Date: Feb 2017 Drives: 2013 Turbo Firestorm FRS Location: Vermont Posts: 3,932 Thanks: 3,199 Thanked 4,095 Times in 2,045 Posts Mentioned: 31 Post(s) Tagged: 0 Thread(s)	It's the ground for the DI ECU that everyone forgets to bolt down. __________________ Turbo FR-S Build - Build Thread JDL EL Recirc manifold, Boostlab BL58x Turbo w/ T51R, 17x9 ARC-8, IAG block

05-06-2023, 12:29 PM	#7
Sapphireho ¯\_(ツ)_/¯ Join Date: Mar 2016 Drives: '15 ultramarine Location: Idaho Posts: 13,192 Thanks: 5,451 Thanked 18,240 Times in 8,609 Posts Mentioned: 155 Post(s) Tagged: 0 Thread(s)	Toyota calls the one on our cars a stone guard. Attached Images

05-06-2023, 06:33 PM	#9
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	just remember kids. never let reality get in the way of a good story! __________________ "The time you enjoy wasting is not wasted time"

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05-06-2023, 12:12 PM	#5
WNDSRFR Senior Member Join Date: Jan 2014 Drives: FR-S,GTI Location: Cocoa, Florida Posts: 1,155 Thanks: 228 Thanked 823 Times in 419 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Looks like I'm not the only one bewildered by this. I just googled "what is flap in front of rear wheel ?" Alot of people want to know. I'm glad I'm not the only one.

05-06-2023, 05:08 PM	#8
LancePower Senior Member Join Date: Aug 2016 Drives: 2020 BRZ tS Location: NJ Posts: 499 Thanks: 92 Thanked 189 Times in 118 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	New cars need all these fancy aero tricks to get much worse gas milage than cars did 30 years ago. Progress!

05-07-2023, 10:23 AM	#11
blsfrs Senior Member Join Date: Dec 2018 Drives: 2013 frs base Location: central Virginia Posts: 1,107 Thanks: 1,719 Thanked 905 Times in 471 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	Ain't Google great. https://www.linkedin.com/pulse/aerod...-vesa-tiainen/

05-07-2023, 10:57 AM	#12
WNDSRFR Senior Member Join Date: Jan 2014 Drives: FR-S,GTI Location: Cocoa, Florida Posts: 1,155 Thanks: 228 Thanked 823 Times in 419 Posts Mentioned: 13 Post(s) Tagged: 0 Thread(s)	Great explanation. It all makes sense now. But what do stones have to do with it?

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