Another take on brake ducts

dunk · 09-28-2008, 10:08 PM

After getting tired of replacing brake duct hose every other track day because it would get caught up in the wheels (17 x 10 CCW's) , we decided to try a different routing. We're using the frame rail to route the air, which works out nicely since it's a little over 3" tall.

Here's some pictures.

New unmolested factory frame rail.

No turning back

See how nice and big it is in there.

Adapter we made for the wheel well. You can't see well from the picture, but it goes all the way to the back of the wall with a radius to help the air around the corner.

A little silicone to seal it all up.

Front piece. Has a similar radius like the rear to make sure there's no hard transitions in the ducting.

New Wilwood Brakes. Replaced my 12.9 x 1.1 rotors with 13.3 x 1.26. Pads are a full .8" thick.

Had to relocated the ABS up in the strut tower since the brake duct not gets in the way.

New duct routing. Nice and short. You can turn the wheel lock to lock with zero interference.

* Registered users of the site do not see these ads.

dunk · 09-28-2008, 10:11 PM

Lower temp hose used in the front. The drivers side hose snakes over the 3" hose for the oil cooler ducting. You can also see the latches that hold the splitter and bumper on.

Passenger size hose routed to the foglight.

STI covers with some flanges hold the hose.

All buttoned back up.

I'll be at Summit next weekend so it should be a good chance to try them out. Big thanks to my buddy Vern and All Aspects Motorsports for the support.

thanks,

Duncan

XanRules · 09-28-2008, 10:20 PM

I don't really know what any of this means or does, but, cool!

raheezy69 · 09-28-2008, 10:37 PM

lowers temps of brakes.
cooler brakes = more stopping
hotter brakes = oh ****

Token-Negro · 09-28-2008, 10:42 PM

Did you test it out with a leaf blower or vacume to see how it flows? Maybe it might be time to add some of those Nascar blowers into the mix to make sure you get the most air you can into the ducts.

Nicklz · 09-28-2008, 10:47 PM

Looks good.

I've been considering different routing method's to get some air to the rotors.

My random thoughts....
Wouldn't you get alot more air to the brakes if you weren't using the fog covers and used the entire fog housing to "ram" air into the hoses?

dunk · 09-28-2008, 11:05 PM

Quote:

Originally Posted by Token-Negro

Did you test it out with a leaf blower or vacume to see how it flows? Maybe it might be time to add some of those Nascar blowers into the mix to make sure you get the most air you can into the ducts.

NASCAR blowers are on the way.

Duncan

nhsilversti · 09-28-2008, 11:26 PM

i may just have to try this! i like it.

only thing i would do different is weld a plate around the rear hole for structural integrety. in reality it is a round hole and shouldnt affect strength but, a plate cant hurt.

good job

slowguy · 09-28-2008, 11:56 PM

Now THAT is a great duct install. I've already ripped mine up after a track day.. (doesn't help I daily'd it for a few days after too)

speedyHAM · 09-29-2008, 12:03 AM

Quote:

Originally Posted by nhsilversti

i may just have to try this! i like it.

only thing i would do different is weld a plate around the rear hole for structural integrety. in reality it is a round hole and shouldnt affect strength but, a plate cant hurt.

good job

For how much load that connection is going to take any extra bracing you put in would be just that- extra.

Looking awesome Dunk. Let us know how well it works.

williaty · 09-29-2008, 12:43 AM

Quote:

Originally Posted by Nicklz

Looks good.

I've been considering different routing method's to get some air to the rotors.

My random thoughts....
Wouldn't you get alot more air to the brakes if you weren't using the fog covers and used the entire fog housing to "ram" air into the hoses?

1) No, the front of the bumper is a high pressure area. The potential flow is already in excess of what the hose can handle, you don't need to make the intake larger.

2) Do this. Now. You need it.

IronMonkeyL255 · 09-29-2008, 01:10 AM

VERY clever thinking.

dunk · 09-29-2008, 11:04 AM

Thanks for all the comments. I think I'm going to run the brake duct fans using the fog light circuit. That way, pushing the fog light button will trigger the blowers.

Duncan

nhsilversti · 09-29-2008, 11:06 AM

this just may be the new standard for subaru ducts. that is if it works out as well as it looks like it is going to.

compton · 09-29-2008, 11:08 AM

Great idea! Let us know how it works out for you.

-noah

GarySheehan · 09-29-2008, 12:19 PM

We considered exactly this for the World Challenge GT Subaru in 2007. But since we had fabricators willing to dive in, we opted for a solution that we thought would provide a little better flow. Here is the really expensive version of the design...

Gary
Sheehan Motor Racing
www.garysheehan.com

gto7419 · 09-29-2008, 12:32 PM

Wow - that looks like a lot of work!

chimchimm5 · 09-29-2008, 01:00 PM

Looks like a new product to me

spazegun2213 · 09-29-2008, 01:04 PM

my god gary.. thats an insane way to add brake ducting!!!

So when will we see that car again?

Dunk, nice engineering!!! let us know how they work.

Homemade WRX · 09-29-2008, 01:36 PM

looks good dunk! Can't wait to hear how the track day goes this coming weekend.

Nurspec · 09-29-2008, 01:46 PM

Does anyone have any concrete data to prove that this helps maintain a cooler average temp? After seeing these on just about every race car it must work. I just like to see numbers and graphs

dunk · 09-29-2008, 01:53 PM

Quote:

Originally Posted by GarySheehan

We considered exactly this for the World Challenge GT Subaru in 2007. But since we had fabricators willing to dive in, we opted for a solution that we thought would provide a little better flow. Here is the really expensive version of the design...

Gary
Sheehan Motor Racing
www.garysheehan.com

I have fabricators, but only 8 hours of time on a Sunday before a track weekend to work on this

Duncan

Nurspec · 09-29-2008, 02:09 PM

Hey duncan is that duct tube just blowing in the general vicinity of the brakes or did you mounted it to something to direct flow?

Turn in Concepts · 09-29-2008, 03:19 PM

Duncan,

Nice setup. I really like the thought there. Innovative.

Tony

WgnWheel · 09-29-2008, 11:29 PM

i think i'll be stealing this idea. good work! let us know how it works out.

09-28-2008, 10:08 PM	#1
dunk Scooby Guru Member#: 15359 Join Date: Feb 2002 Chapter/Region: MAIC Location: Monterey, CA	Another take on brake ducts After getting tired of replacing brake duct hose every other track day because it would get caught up in the wheels (17 x 10 CCW's) , we decided to try a different routing. We're using the frame rail to route the air, which works out nicely since it's a little over 3" tall. Here's some pictures. New unmolested factory frame rail. No turning back See how nice and big it is in there. Adapter we made for the wheel well. You can't see well from the picture, but it goes all the way to the back of the wall with a radius to help the air around the corner. A little silicone to seal it all up. Front piece. Has a similar radius like the rear to make sure there's no hard transitions in the ducting. New Wilwood Brakes. Replaced my 12.9 x 1.1 rotors with 13.3 x 1.26. Pads are a full .8" thick. Had to relocated the ABS up in the strut tower since the brake duct not gets in the way. New duct routing. Nice and short. You can turn the wheel lock to lock with zero interference. * Registered users of the site do not see these ads. Last edited by dunk; 09-29-2008 at 10:37 AM.

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09-28-2008, 10:11 PM	#2
dunk Scooby Guru Member#: 15359 Join Date: Feb 2002 Chapter/Region: MAIC Location: Monterey, CA	Lower temp hose used in the front. The drivers side hose snakes over the 3" hose for the oil cooler ducting. You can also see the latches that hold the splitter and bumper on. Passenger size hose routed to the foglight. STI covers with some flanges hold the hose. All buttoned back up. I'll be at Summit next weekend so it should be a good chance to try them out. Big thanks to my buddy Vern and All Aspects Motorsports for the support. thanks, Duncan

09-28-2008, 10:20 PM	#3
XanRules Scooby Guru Member#: 157348 Join Date: Aug 2007 Chapter/Region: South East Location: ¯\_(ツ)_/¯ Vehicle: It's rowdy outside I ain't signin' s***	I don't really know what any of this means or does, but, cool!

09-28-2008, 10:37 PM	#4
raheezy69 Scooby Specialist Member#: 163078 Join Date: Oct 2007 Chapter/Region: TXIC Location: Dirty South Vehicle: MARG BAR DICTATOR LONG LIVE IRAN!!	lowers temps of brakes. cooler brakes = more stopping hotter brakes = oh ****

09-28-2008, 10:42 PM	#5
Token-Negro Scooby Specialist Member#: 81659 Join Date: Feb 2005 Chapter/Region: NWIC Location: Sammamish Vehicle: 2010 Fozzy XT Ice Silver Metallic	Did you test it out with a leaf blower or vacume to see how it flows? Maybe it might be time to add some of those Nascar blowers into the mix to make sure you get the most air you can into the ducts.

09-28-2008, 10:47 PM	#6
Nicklz Scooby Specialist Member#: 94096 Join Date: Aug 2005 Chapter/Region: MAIC Location: WV Vehicle: 2003 WRX WRB	Looks good. I've been considering different routing method's to get some air to the rotors. My random thoughts.... Wouldn't you get alot more air to the brakes if you weren't using the fog covers and used the entire fog housing to "ram" air into the hoses?

09-28-2008, 11:26 PM	#8
nhsilversti NASIOC Supporter Member#: 50895 Join Date: Dec 2003 Chapter/Region: NESIC Location: southern NH Vehicle: . www.48hrs.info donation chairman	i may just have to try this! i like it. only thing i would do different is weld a plate around the rear hole for structural integrety. in reality it is a round hole and shouldnt affect strength but, a plate cant hurt. good job

09-28-2008, 11:56 PM	#9
slowguy Scooby Specialist Member#: 4326 Join Date: Feb 2001 Location: Vancouver Vehicle: 2010 turdle	Now THAT is a great duct install. I've already ripped mine up after a track day.. (doesn't help I daily'd it for a few days after too)

09-29-2008, 01:10 AM	#12
IronMonkeyL255 Scooby Specialist Member#: 38120 Join Date: Jun 2003 Chapter/Region: South East Location: Greenville, SC Vehicle: 1991 Rio Red Legacy Turbo	VERY clever thinking.

09-29-2008, 11:04 AM	#13
dunk Scooby Guru Member#: 15359 Join Date: Feb 2002 Chapter/Region: MAIC Location: Monterey, CA	Thanks for all the comments. I think I'm going to run the brake duct fans using the fog light circuit. That way, pushing the fog light button will trigger the blowers. Duncan

09-29-2008, 11:06 AM	#14
nhsilversti NASIOC Supporter Member#: 50895 Join Date: Dec 2003 Chapter/Region: NESIC Location: southern NH Vehicle: . www.48hrs.info donation chairman	this just may be the new standard for subaru ducts. that is if it works out as well as it looks like it is going to.

09-29-2008, 11:08 AM	#15
compton Scooby Specialist Member#: 10646 Join Date: Sep 2001 Location: FL Vehicle: 02 sti bugeye still filthy	Great idea! Let us know how it works out for you. -noah

09-29-2008, 12:19 PM	#16
GarySheehan Scooby Specialist Member#: 2450 Join Date: Sep 2000 Chapter/Region: BAIC Location: SF Bay Area Vehicle: 1996 2005 Subaru STI White	We considered exactly this for the World Challenge GT Subaru in 2007. But since we had fabricators willing to dive in, we opted for a solution that we thought would provide a little better flow. Here is the really expensive version of the design... Gary Sheehan Motor Racing www.garysheehan.com

09-29-2008, 12:32 PM	#17
gto7419 Scooby Specialist Member#: 44256 Join Date: Sep 2003 Chapter/Region: Tri-State Location: Long Island, NY Vehicle: 2002 WRX Wagon	Wow - that looks like a lot of work!

09-29-2008, 01:00 PM	#18
chimchimm5 Scooby Guru Member#: 88501 Join Date: Jun 2005 Chapter/Region: BAIC Location: NorCal Vehicle: 2006 WRX Wagon CGM	Looks like a new product to me

09-29-2008, 01:04 PM	#19
spazegun2213 Scooby Specialist Member#: 91208 Join Date: Jul 2005 Chapter/Region: SCIC Location: San Diego Vehicle: the 06 Ram OMG the vettez!	my god gary.. thats an insane way to add brake ducting!!! So when will we see that car again? Dunk, nice engineering!!! let us know how they work.

09-29-2008, 01:36 PM	#20
Homemade WRX Scooby Guru Member#: 33782 Join Date: Mar 2003 Chapter/Region: MAIC Location: 3MI Racing LLC Vehicle: 96 bastard child search FIRST, then PM!!!	looks good dunk! Can't wait to hear how the track day goes this coming weekend.

09-29-2008, 01:46 PM	#21
Nurspec Scooby Newbie Member#: 155133 Join Date: Jul 2007 Chapter/Region: SWIC Location: Arizona	Does anyone have any concrete data to prove that this helps maintain a cooler average temp? After seeing these on just about every race car it must work. I just like to see numbers and graphs

09-29-2008, 02:09 PM	#23
Nurspec Scooby Newbie Member#: 155133 Join Date: Jul 2007 Chapter/Region: SWIC Location: Arizona	Hey duncan is that duct tube just blowing in the general vicinity of the brakes or did you mounted it to something to direct flow?

09-29-2008, 03:19 PM	#24
Turn in Concepts NASIOC Vendor Member#: 93646 Join Date: Aug 2005 Chapter/Region: MWSOC Vehicle: Many Track Records Let us help you go fast!	Duncan, Nice setup. I really like the thought there. Innovative. Tony

09-29-2008, 11:29 PM	#25
WgnWheel Scooby Specialist Member#: 63605 Join Date: Jun 2004 Chapter/Region: SWIC Location: Moms...yours Vehicle: 04 Wrx Wgn TimeAtk 10 Golf TDI, 08 Stang GT	i think i'll be stealing this idea. good work! let us know how it works out.