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Old 08-25-2008, 05:28 PM   #1 (permalink)
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Default Best Performance Brake Shoes for Rear Drums?

I see a lot of threads here about high performance rotors and pads for disc brakes, but my 2007 Forester 2.5X has rear drum brakes.

So, I'm wondering if you could recommend a higher (than stock) performance brake shoe for the drum brakes? Thanks for your help.

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David Baldock
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Old 08-25-2008, 05:33 PM   #2 (permalink)
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There are none, AFAIK.
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Old 08-25-2008, 09:59 PM   #3 (permalink)
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Don't know if Porterfield still produce shoes or not for Subarus but they are a well respected brand.

:: #1 Race Specialist in The World ::

EDIT

I think the R-4 and R4-S may work. I believe Subaru have used the same rear drum setup for some time.

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Old 08-25-2008, 11:05 PM   #4 (permalink)
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Don't know if Porterfield still produce shoes or not for Subarus but they are a well respected brand.

:: #1 Race Specialist in The World ::

EDIT

I think the R-4 and R4-S may work. I believe Subaru have used the same rear drum setup for some time.

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Thanks. I just sent them an email, asking whether the R4-S would work with the rear drums on a 2007 Forester 2.5X.

Take Care,
David Baldock
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Old 08-26-2008, 09:14 AM   #5 (permalink)
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Thanks. I just sent them an email, asking whether the R4-S would work with the rear drums on a 2007 Forester 2.5X.

Take Care,
David Baldock
They answered, and said that the R4-S will fit a 2007 Forester 2.5X.

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Old 08-26-2008, 02:06 PM   #6 (permalink)
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They just need a drum option for you. That's all, and several of the bigger companies will offer both disk and drum variants of at least a part of their product line.

If you were really anal about the drum issue, you could always head over to a junkyard and see if you can find and yank off the rear end parts of a Forester or Impreza model with disk rear brakes. I do personally tend to prefer disk brakes because they are more even in behavior. Drum isn't bad, but they do operate differently than the disks on the front.

A note on Pagid friction levels:

TECHNICAL ISSUES FOR PAGID RACE PADS

Each line is in 0.05 mu increments, 0.35 starting at the bottom of the graph going up to 0.60. I'm personally curious about the RS-15 pads. They'd be somewhat similar to my Carbotech AX6 pads that I use in grip levels but a little more cold bite.

Carbotech pads (not really listing over entire temp range but only "operating temp" range

Bobcat - Mu is around 0.45 - temp range of ambient up to about 900F.

Panther Plus/AX6 - Mu is around 0.50 - temp range is 150-1250F.

Panther XP8 - Mu is around 0.55 - temp range is 250-1350F.

Panther XP10 - Mu is around 0.60 - temp range is 250-1650F.

Panther XP12 - Mu is around 0.65 - temp range is 250-2000F

Panther XP16 - Mu is around 0.70 - temp range is 250-2000F

The XP8, XP10, XP12, and XP16 are considered race only pads, but cold Mu should remain decently significant. However, they will pretty much never be in their "operating temperature" during normal driving...ever. Even my AX6 pads require more than one hard stop to get a good amount of heat into them. One quick stop from highway speed isn't even enough. There is a matter of need in terms of friction levels. You also have to consider linearity of the friction level from cold to hot and how this affects driving. Then there's dusting and rotor/pad wear to consider too, not to mention noise.

Last edited by back road runner; 08-26-2008 at 02:47 PM.
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Old 08-26-2008, 03:15 PM   #7 (permalink)
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Originally Posted by dbaldock9 View Post
So, I'm wondering if you could recommend a higher (than stock) performance brake shoe for the drum brakes? Thanks for your help.

Take Care,
David Baldock
Honestly for rear's its not worth the trouble. They take less than 25% of braking force. Just my opinion though.
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Old 08-29-2008, 10:59 AM   #8 (permalink)
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Yes, they don't provide a relatively high level of braking. However, they do affect overall braking performance (more than you may think) and do control the balance of the car under braking into a corner. A brake system that is front biased will understeer into a corner under braking. A brake system that is rear biased will oversteer into a corner while braking. It is a tool to both control overall braking ability and to control handling balance under braking when approaching and going into a corner. Even on an ABS equipped car, it still helps to have a more neutral biased brake system. ABS doesn't do anything nor automatically redistribute the line pressure as needed to counter the crappy bias until you start locking up tires. Folks with 02 and older won't have their brake for distribution system either, and they're stuck with the weakest point, either lock happy front end or lock happy rear end as the "greatest" braking level they can achieve on a given surface...even if it's half of what you actually have available to you. OP with an 07 has the automatic distribution system, so it will move braking force around to different wheels automatically under full lock situations. However, below ABS engagement, it's all whatever the setup bias is. It just seems more intelligent to start even in the first place, doesn't it?
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Old 08-29-2008, 04:34 PM   #9 (permalink)
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Carbotech will put any of there materials on a shoe you send them. Worked for my '73 Capri w/ drums.
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