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Old 08-23-2002, 09:32 AM   #1
CRAZY KEN
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Default H6 rear brake upgrade

The search engine wont allow me to search "H6" ...so I was just wondering has anyone done it???

Post pics, comments, parts and price!!!


Thanks,

CRAZY KEN
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Old 08-23-2002, 03:12 PM   #2
subysouth
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Default This might help

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Old 08-23-2002, 07:05 PM   #3
monovich
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Be advised: Subysouth is a brake guru.

-S
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Old 08-23-2002, 07:10 PM   #4
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Default

The cheapest way to do this is to get someone who has upgraded the rear brakes on a WRX and grab the hardware (minus rotor and bracket). Then get the bracket from subarparts and find whatever aftermarket rotor you want.

Im about half way though this process. I still havnt decided on a rotor.

I need help in confirmation that I can use the vented rotors with the standard caliper.
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Old 08-23-2002, 07:36 PM   #5
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Default COOL....

...SHOW ME THE WAY!!! Ciper
...or tell me the way!!! subysouth


Thanks,


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Old 08-24-2002, 03:55 PM   #6
subysouth
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Default Thanks Steve but ...

student of subie brakes might be more appropriate. As we both know, you have some answers to some interesting rear brake questions on the way to you now . Can't wait to hear them.

As far as this upgrade goes CRAZY KEN, let me tell you what I know and don't know.

Let's talk about Subaru rear disc brakes.

The rear rotor used on my Legacy(1994,) all RSs, most Legacys and Imprezas, all the way up to and including current WRXs, is a 266x10mm solid rear rotor utilizing a 170mm internal parking brake. The only 2 other US rear discs offered since 1990 were the 266x18mm vented rear disc found on BC/F Turbo Legacys and the 290x10mm solid rear rotor found on ALL 2000+ Legacys(not just the H6 equipped ones) with rear discs. Both of the these discs were also equipped with a 170mm parking brake. The reason I am mentioning the parking brake size is because a few JDM WRX-STis came equipped with 290mm and 316mm rotors with a 190mm internal parking brake.

Another rotor, which is the one I believe Ciper is alluding to, of significant importance is the 290x18mm(with 170mm parking brake) vented rotor which comes with the $1300 2pot rears you see some vendors selling. This rotor has never been sold on a US Subaru.

The upgrade to the 266x18mm vented rotor can be found in detail on Brian's(North Ursalia) northursalia.com. It requires purchasing the turbo Legacys caliper/brackets and rotors but will use your stock backing plate/dust shield with no mods and the stock parking brake. It can be a bit expensive to pull off because it does require so many components to be bought.

Now in reference to the "H6" upgrade, here's where things get a little confusing. If you have any 2000 and up Subaru with rear discs, I am sure of the following things. To upgrade to the 290x10mm H6 rotor you need only to buy the rotors, larger caliper brackets and either remove or bend the rear dust shield(thin sheet metal shield that is attached to the perimeter of the backing plate.) Every thing bolts right up and uses your existing parking brake internals. A sweet and inexpensive upgrade. Part numbers are listed in the thread linked above.

Now here's where the confusion comes in. When dealing with 99 and older Subarus. At some point (and I continue to try to find this info out for sure) in 98 or 99 Subaru changed the shape of the caliper/bracket on the single pot rears. So this leads to the question, will the old caliper fit in the "new style" caliper bracket and therefore the larger "new style" caliper bracket used with H6 rotor. No one has definitively answered this. Worse case scenario, as Ciper said, is guys with the older style caliper/brackets may have to replace the calipers as well as the brackets and rotors. If you are willing to wait a few more weeks for an answer I will have a definitive one for you. I am pursuing a rear brake upgrade and info on a daily basis at this point.

HTH
subysouth
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Old 08-24-2002, 07:45 PM   #7
makeway
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Thumbs up WOW

Dam this guy knows his shizack! I'm Imprezed. I'm looking to up grade my rear brakes, I have drum brakes in the rear and WRX brakes in the front. It's a 96 2 door what would you recomend I do? Thanks for your help O wize one!
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Old 08-25-2002, 07:28 PM   #8
kbrate
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Question Confused?

Quote:
Originally posted by subysouth
snip...

...and the 290x10mm solid rear rotor found on ALL 2000+ Legacys(not just the H6 equipped ones) with rear discs.

Snip...

Now in reference to the "H6" upgrade, here's where things get a little confusing. If you have any 2000 and up Subaru with rear discs, I am sure of the following things. To upgrade to the 290x10mm H6 rotor you need only to buy the rotors, larger caliper brackets and either remove or bend the rear dust shield(thin sheet metal shield that is attached to the perimeter of the backing plate.) Every thing bolts right up and uses your existing parking brake internals. A sweet and inexpensive upgrade. Part numbers are listed in the thread linked above.

Snip...

HTH
subysouth
If, as you stated, all 2000+ Legacy's start with 290 x 10 mm Disk's and Single Piston Sliding Calipers what are you upgrading by changing to the "H6" version???

BTW _ I have a set of Part number sheets and they show only one set of numbers for all 2000+ Legacy rear brakes including the H6 Outback.

KCB
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Old 08-25-2002, 07:48 PM   #9
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Default well

I agree. I think I said that the 290x10mm rear discs are for all 2000+ Legacys not just the H6. Other people have used this term either out of confusion or for simplicity's sake, I was trying to clear that up. It is not an H6 exclusive rotor.

I was also trying to descibe the caliper changeover issue. If you already have a 2000+ Legacy with rear discs, yes this upgrade is a moot point. However a lot of other Subie people cruise this forum and their 2000+ Subarus would fall into this category. And unfortunately that is the first year I can definitively say that the calipers were the new style(I know youre thinking-duh.) I have my own ideas I would risk trying to equip my car but I don't like to give out info unless I'm certain.

My opinions: I am 95% certain the new calipers were on the 99 model Subarus. My guess at this point is that 98 was the last year of the old style caliper bracket. Unfortunately I gander a great deal of my Subaru brake info from overseas and there is ~ a one year lag in US Subaru models and overseas models. So a lot of my info doesnt help. If any of you 98 or 99 guys want to help track the info down, snap a pic of your rear caliper and post it please.

Further, as I said it may be possible for all 1990+ subies with solid rear rotors to use the larger caliper brackets and rotors from the 2000+ Legacys. It is unclear if the bolt spacing, position, etc. on the "new" calipers is different from the old single pot caliper. I fully intend to verify this(one way or the other) in the next few weeks by the trial and error method, unless someone beats me to it. In which case, I hope they post the results.

subysouth

edit: 97 definitely has the older bracket. 98 and 99 guys if you post a pic please include the month as well as the year of build. Thanks.

Last edited by subysouth; 08-25-2002 at 07:55 PM.
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Old 08-25-2002, 08:14 PM   #10
subysouth
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Default I have a better idea

You know what they say, a pic is worth.....

Older style caliper/bracket:

Newer style caliper/bracket:



So instead of snapping a pic and posting just post a reply, and again please include month as well as the year.

subysleuth
brake detective

edit: dead link - lemme try another
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Old 08-26-2002, 11:13 PM   #11
subysouth
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Default BUMP!

C'mon you 98-99 guys. Take a look at the pics and let us know what you got. I won't take more than two minutes(unless you got a really long driveway )

TIA
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Old 08-27-2002, 09:06 AM   #12
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Default

In 1999 on the Foresters and Imprezas, they changed the caliper bracket while the Outback and legacy continued with the old style. They swithched to the new style for the 2000 model year Outback and Legacy.

Have you thought about the vented rear disk setup from the JDM legacy B4 and GT-B? Or is this the one you mentioned above part # 26700ae030 ?
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Old 08-27-2002, 11:30 AM   #13
subysouth
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Default Cardin

Is that part number for the 290x18mm(170) rotor? It wont work at subaruparts.com. Its a JDM part number?

My question is also if you look closely at the calipers you can see slight differences in them as well, not just different brackets. Do you know if the bolt pattern, caliper position, etc. is the same. Meaning do you know if the older style caliper will fit in the newer style caliper bracket?

I have only recently become aware that the rotor above was being used on the 2000+ B4s and GT-Bs. That is currently the focus of my search. Again a reason I was advising a few weeks wait for Ken, I may well have a better alternative. But, at this moment it is still speculative.

Cardin you seem to supply JDM parts, do you or can you buy parts from JDM Subaru dealers?

Thanks
subysouth
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Old 08-27-2002, 11:31 AM   #14
subysouth
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Default CRAZY KEN

My apologies for thread hijacking but I think we're heading in the direction of your interest.

subysouth
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Old 08-27-2002, 12:37 PM   #15
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Default

I can get a hold of some JDM parts through the dealer that I work at. I have ordered those disks before without problems. I am also working with an aquaintance who lives in Japan so that I may be able to get more JDM stuff ( especially for the Legacy guys). I have the JDM parts catalogue for revision a, b, and c.

As for the caliper positioning on the bracket, I will talk to some of the techs in our shop and if I can, I will take measurements.

And yes, that disk is the vented 290mm x 18mm.
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Old 08-27-2002, 09:10 PM   #16
kbrate
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Default

Quote:
Originally posted by subysouth
Snip...

I have only recently become aware that the rotor above was being used on the 2000+ B4s and GT-Bs. That is currently the focus of my search. Again a reason I was advising a few weeks wait for Ken, I may well have a better alternative. But, at this moment it is still speculative. Snip...

Do you know what caliper they use with this disk? This is also the disk that I have been looking at to use with the Subaru 2 pistons rear calipers. I'm going to Subaru 4-Pots up front and I haven't made up my mind what to do about the rear. When I get my front calipers in a week or so I should be getting a 2 piston rear caliper to test fit against the rear mount. I don't think it will fit but it's worth a shot.

KCB
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Old 08-27-2002, 10:17 PM   #17
subysouth
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Default kbrate

That is the holy grail you speak of. If you can get the rear 2pot, do it. I can fill you in on every thing else you need. it will not fit on your current rear backing plate

You need to get a rear backing plate that has a 4.5" mounting hole spacing. Unique to the 2pot rear caliper. The standard single pot calipers use a 5.75" mounting bolt spacing.

That kit has been cost prohibitive for most of us, but if you got the hook-up run with it.

subysouth
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Old 08-28-2002, 09:01 AM   #18
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Default

You are refering to the 2 pot caliper (rear) off of the WRX?

I think we would all be interested to see how you do that.

If that is prohibitive, how about just getting the backing plate and bracket for the caliper to fit the vented disk?

Just a thought.
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Old 08-28-2002, 10:49 AM   #19
kbrate
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Default More

subysouth

From everything I've seen posted I think your right but since it was offered and I'm going to have the rear appart to put in SS Lines, new Disc's & Pads I might as well prove to myself that the 2-pot won't fit a 3rd gen Legacy without a new backing plate. Not a big deal.

I also keep wondering if there is a way to do an adapter bracket.... gotta get some measurments.....

I did go back and check and it was you who posted a picture of a backing plate with two sets of holes in it in a thread in the suspension forum. Do you know where that was used and is there a Subaru PN for it ?

KCB
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Old 08-28-2002, 11:19 AM   #20
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Subysouth,

A MY 99 owner here. I just took a look and my calipers look like the first pic. Unfortunately I think Subaru changed the caliper design when they went to the New Age stuff. I will check my cars build date when I get some time
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Old 08-28-2002, 11:53 AM   #21
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Default Thanks subarugt

That is line with what cardin555 said(thanks for the info cardin.)

I knew the Imprezas and Foresters by 99 had the new style but was unsure about the Legacy/OB. So it does appear, unfortunately, for Legacys/ OBs that 2000 is the first year guaranteed to have the new bracket. Of course they also already have the larger rotors, so again a moot point. Except when being viewed from the parts car perspective.

So the next step is again gonna be to see if the old caliper will work with the new style bracket.

I also still think some of the late year 98 Imprezas/Foresters may well have the new style caliper/bracket too.

subysouth
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Old 08-28-2002, 02:01 PM   #22
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Question hmmm...soo...

...can I get some part numbers to order a H6 upgrade or should I just wait or is the vented rear rotor upgrade good enough, if so, what are the part numbers for those too!!!


Thanks,

CRAZY KEN
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Old 08-28-2002, 03:25 PM   #23
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Exclamation My bad

I just realized something. You would have to change the caliper to go with the vented rear disk. Since the disk is thicker, the caliper and the bracket have to follow suite. I guess it doesn't look like such a low buck alternative. As for the part #'s :

bracket 26625AE010 x2
disk 26700AE030 x2
caliper 26692AE020 rh
caliper 26692AE030 lh
pads 26696AE000 x1

If any one wants more info on these, post hear or PM me.
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Old 08-28-2002, 05:30 PM   #24
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Default

cardin - What specifically are those the part numbers for? What year, what type of caliper, what size of rotor, etc.? Part numbers=SWEEEET

Crazy Ken - IMO wait. There is news on the horizon.

subysouth
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Old 08-28-2002, 08:50 PM   #25
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Well the 26700AE030 Disk is a 290mm x 18mm Vented rear Disk with a 170mm Hand Brake Drum. My source says that the PN has been superseeded by 031 but ....??

subysouth - I'm still interested in info on the Backing Plates that you posted a picture of in the Suspension forum - looked like they had two sets of mounting holes - info plrease ???

KCB
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