Welcome to the North American Subaru Impreza Owners Club Friday December 19, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
Click here to visit TireRack
Brakes & Suspension Forum sponsored by The Tire Rack

Losing traction? Need new tires?
Click here to visit the NASIOC Upgrade Garage...
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Brakes, Steering & Suspension

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-21-2002, 09:03 PM   #1
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default H-6 rear brake upgrade

Just did it...here are some pics...It was easy for the most part. I did have hesitation "modifying" my rotor shield. But I had to do it to make it fit. Look good. I haven't driven it yet. And don't really expect too much more braking power. It'll complement my 4 pots up front though.

Rotors:
* Registered users of the site do not see these ads.
Attached Images
File Type: jpg rotor.jpg (20.2 KB, 851 views)
mr2guru is offline   Reply With Quote
Old 03-21-2002, 09:05 PM   #2
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

here is the only other part needed..the legacy H-6 bracket. Hell the whole conversion is only $200. Can't beat that.
Attached Images
File Type: jpg bracket.jpg (22.5 KB, 843 views)
mr2guru is offline   Reply With Quote
Old 03-21-2002, 09:35 PM   #3
tselway
Scooby Newbie
 
Member#: 7490
Join Date: Jun 2001
Chapter/Region: E. Canada
Location: NS, Canada
Vehicle:
2014 2.0i 5dr 5MT
Deep Sea Blue Pearl

Default

is the drum the same size / does your emergency brake still work?

I was thinking about doing this too.
tselway is offline   Reply With Quote
Old 03-21-2002, 10:09 PM   #4
BIGSKYWRX
Scooby Guru
 
Member#: 7958
Join Date: Jul 2001
Location: Plains of Eastern Montana
Vehicle:
09 GH B+

Default

same questions as above, plus are the H-6 rotors vented as well? Also is $200 for all new parts? Part #'s if you have them.

Thanks

Big Sky
BIGSKYWRX is offline   Reply With Quote
Old 03-21-2002, 10:24 PM   #5
Imprezer
Dynamic Uno
 
Member#: 1
Join Date: Jun 1999
Chapter/Region: BAIC
Location: Alameda, CA
Vehicle:
2011 Impreza WRX STi
Black

Default

Is the thickness of the hub part of the H-6 rotor the same as the WRX one? In othre words, was the rim position changed?

Can you measure the rotor diameter WRX vs. H-6 please.

Great mod. Great job.

Thanks!

-Alex
Imprezer is offline   Reply With Quote
Old 03-21-2002, 10:31 PM   #6
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

Ok let's see...the emergency brake still works. That section of the rotor is exactly the same size, thickness and all It is still a solid rotor like the stock ones. Don't bet your life on it but I am pretty sure, almost positive the rotor diameter is 11.4 instead of 10.4 for stock. So you gain a whole inch there. The pad contact area covers the whole rotor surface just like stock. If you know what I mean there um, Still haven't driven it yet so.....I will later tonight But it fills out the wheel as much as the fronts do know.

thanks
mr2guru is offline   Reply With Quote
Old 03-22-2002, 02:52 AM   #7
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default Re: H-6 rear brake upgrade

Quote:
Originally posted by mr2guru
And don't really expect too much more braking power.
I'd expect just over 10% more braking power in the rear...

10.4 vs. 11.4 puts the braking force about 10% further out. Given the same pressure, you'll have ~10% more stopping force, think of it as a lever, you just got a longer one.

You also increased swept area, which will allow better heat dissipation, but I doubt that's a big issue on the rears.

Looks like a no brainer for anyone doing the fronts that doesn't want to go whole hog like the Wilwood rear kit.
Concillian is offline   Reply With Quote
Old 03-22-2002, 10:51 AM   #8
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

I ordered the same exact set-up from subaruparts.com. Should get them next week. Thanks for the info!

WHat exactly did you have to do to the brake shield to get them to fit?

Thanks,

Tim

Oh the part numbers are:

Rotors 26700AE04A
Support Brackets 26625AE000
mav1c is offline   Reply With Quote
Old 03-22-2002, 12:04 PM   #9
Austin
Scooby Guru
 
Member#: 7089
Join Date: May 2001
Chapter/Region: NWIC
Location: Western Wa
Default

Here is a pic of the 11.4" rear rotors installed


and a pic of the 11.3" stock front rotors.


Stock rear rotor size is 10.3", so you gain 1.1" in diameter. The rear brake pads are just over 1.3" tall at their widest, meaning swept area on a 10.3" rotor is about 19.7 square inches. Swept area on a 11.4" rotor w/1.3" tall pad is about 21.95 square inches.

So with 11.4" rear rotors, you'll have 111% of your original 10.3" rear rotor braking power.

I noticed that the back end "hunkered down" a bit more under heavy braking. Worth the time and money, IMHO. FWIW, I'm using Porterfield carbon kevlar pads.
Austin is offline   Reply With Quote
Old 03-22-2002, 01:12 PM   #10
jeffg
Scooby Guru
 
Member#: 2958
Join Date: Nov 2000
Chapter/Region: NWIC
Vehicle:
2001 WRX (GC8)

Default

Can anyone tell me what more is involved in doing this on a GC8 RS?

I would really love bigger rear brakes when I do my bigger front brakes.

Jeff
jeffg is offline   Reply With Quote
Old 03-22-2002, 01:33 PM   #11
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

I had to remove the brake shield. It is spot welded on to the axle bearing carrier? You'll see. I just took a big screwdriver and started prying at the spot welds, worked my way around and it comes off pretty easy. About six little spot welds. I dremeled the remains of the spot welds down and painted the bare metal. Look clean. You'll see once you get the stock rotor off, very simple. You'll have to reuse your caliper slider pins in the new bracket.


Jim
mr2guru is offline   Reply With Quote
Old 03-22-2002, 03:33 PM   #12
mpaone
Scooby Specialist
 
Member#: 3
Join Date: Jun 1999
Chapter/Region: South East
Location: Alfretter Geeoja
Vehicle:
2012 Geeteeeye
and 71' VW Gulf Beetle

Thumbs up

I'm suprised that some people were unaware of this upgrade.

It's definitely a great deal... can't beat $200 for more braking power.

I would get it myself, but I had the Legacy Turbo rear vented rotors and calipers off of my old RS... although they were a BIT more cash new (about $500 ).

-Mike.
mpaone is offline   Reply With Quote
Old 03-22-2002, 04:54 PM   #13
bemani
Scooby Specialist
 
Member#: 5673
Join Date: Apr 2001
Location: Folsom, CA
Vehicle:
2002 WRX/2005 LGT
09 Ducati M696/ZX6R

Default

Is this still a 1 pot setup?
bemani is offline   Reply With Quote
Old 03-22-2002, 05:30 PM   #14
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

Same calipers, so yeppers to the 1 pot.

Even the vented rear Turbo Legacy setup is still a 1 pot.
Concillian is offline   Reply With Quote
Old 03-22-2002, 06:15 PM   #15
tselway
Scooby Newbie
 
Member#: 7490
Join Date: Jun 2001
Chapter/Region: E. Canada
Location: NS, Canada
Vehicle:
2014 2.0i 5dr 5MT
Deep Sea Blue Pearl

Default

So, what is the risk of having no brake shield? Will this affect brake cooling or does it just protect from roadkill?

TonyS
tselway is offline   Reply With Quote
Old 03-23-2002, 03:13 AM   #16
JamesC
Scooby Newbie
 
Member#: 3101
Join Date: Nov 2000
Location: Plano, TX USA
Vehicle:
'02 WRX 4dr WRB

Default

I would imagine there must be vented rear rotors available aftermarket for this conversion as well? I would be looking for Legacy Rear rotors, yes?

$200/each rotor for the turbo legacy kit seems a bit high in comparison to many oem sized aftermarket fronts, unless they were already cryo treated, etc?

Thanks

JamesC
JamesC is offline   Reply With Quote
Old 03-23-2002, 04:30 PM   #17
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

Honestly, unless your driving at a race track or just driving the PISS out of your car....vented rear rotors are overkill. I don't think Subaru makes a vented rear rotor in the 11.4in size. The turbo legacy vented rears are smaller I believe. Since I have never driven my brakes 10/10ths before, and probably never will, I didn't need an increase in sustained performance as in reducing brake fade and such. I was really going for a better look. Those stock rears are just so tiny. These fill out the rear wheels nicely. And it's not expensive at all.
mr2guru is offline   Reply With Quote
Old 03-23-2002, 04:52 PM   #18
Concillian
Scooby Guru
 
Member#: 4414
Join Date: Feb 2001
Location: Dublin, CA
Vehicle:
2002 WRX Sedan
Midnight Black

Default

The increase in swept area associated with the larger rotors will aid in fade-resistance. The rear brakes typically do about 20% of the total braking, so fade in the rear probably isn't a big deal to begin with.

I imagine after adding an inch to the diameter and zero extra force (same caliper) you will have even fewer concerns with heat in th rear.

When Gary Sheenan had the stock brakes all around he was frying the front brakes, not the rears. Heat shouldn't be a major concern in the rear at all, especially with this setup.
Concillian is offline   Reply With Quote
Old 03-23-2002, 05:11 PM   #19
Godmal
Scooby Specialist
 
Member#: 4934
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: LITH, IL
Vehicle:
2007 White STI LTD
Grey Mazda 5

Default

Where did you source all of the parts from? If they are are from a Subaru dealer, then that is a good price! Good mod!
Godmal is offline   Reply With Quote
Old 03-23-2002, 09:23 PM   #20
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

I got them all from subaruparts.com good service.
mr2guru is offline   Reply With Quote
Old 03-24-2002, 10:57 AM   #21
mav1c
Hoodbridge!
Moderator
 
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
Vehicle:
2006 STi, '11 A4
Crystal Gray, Silver

Default

JamesC,

It's $200 for everything. 2 rotors and 2 brackets. It was $226 shipped for me.
mav1c is offline   Reply With Quote
Old 03-24-2002, 01:54 PM   #22
Zahnster
Scooby Specialist
 
Member#: 2918
Join Date: Nov 2000
Location: Simi Valley, CA, USA
Vehicle:
2002 Impreza WRX
Silver Sedan

Default

--I can't read...

Last edited by Zahnster; 03-24-2002 at 03:00 PM.
Zahnster is offline   Reply With Quote
Old 03-24-2002, 02:20 PM   #23
Godmal
Scooby Specialist
 
Member#: 4934
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: LITH, IL
Vehicle:
2007 White STI LTD
Grey Mazda 5

Default

Stupid question... are they the same pads?
Godmal is offline   Reply With Quote
Old 03-24-2002, 06:25 PM   #24
mr2guru
Scooby Specialist
 
Member#: 10334
Join Date: Sep 2001
Location: St. Louis
Vehicle:
91 RX7 LSx swap
'09 CC 3.6 4motion

Default

Pads are the same....since the caliper is the same.
mr2guru is offline   Reply With Quote
Old 03-24-2002, 06:59 PM   #25
Zahnster
Scooby Specialist
 
Member#: 2918
Join Date: Nov 2000
Location: Simi Valley, CA, USA
Vehicle:
2002 Impreza WRX
Silver Sedan

Default

I was going back and reading an earlier thread and someone suggested using the sheilds from the H-6. Anyone have any thoughts on this? (I guess you'd have to weld these ones on too....ugh)
Zahnster is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS - MD: - H6 / DBA rear brake upgrade & 04 WRX rear brakes MD04WRX Suspension/Brakes/Handling 10 03-20-2009 04:46 PM
WRX rear brake upgrade anyone? Prog Brakes, Steering & Suspension 27 02-05-2002 12:14 AM
rear brake upgrade? V6 Brakes, Steering & Suspension 10 02-02-2002 06:28 PM
rear brake upgrade question? spike Brakes, Steering & Suspension 0 01-11-2002 04:04 AM
rear brake upgrade 5doorman Brakes, Steering & Suspension 0 07-17-2001 01:10 AM


All times are GMT -4. The time now is 12:16 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.