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Old 09-10-2019, 11:08 PM   #1
JAgostoni
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Default 2019 STI - Project Mu or Endless Pad Sizes

Not sure if I am alone here but it seems a lot of vendor sites simply don't list much for the 2018/2019 STIs regarding brake pads.

I am looking for the correct part no's, sizes, whatever for Project Mu's and Endless.

Specifically, looking at the PMU HC+ or HC-CS and the Endless CC-Rg.

Happy to hear from Vendors or even members with experience on these pads (daily and Novice track use).

Thanks!
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Old 09-11-2019, 12:53 AM   #2
Yeeman19
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Quote:
Originally Posted by JAgostoni View Post
Not sure if I am alone here but it seems a lot of vendor sites simply don't list much for the 2018/2019 STIs regarding brake pads.

I am looking for the correct part no's, sizes, whatever for Project Mu's and Endless.

Specifically, looking at the PMU HC+ or HC-CS and the Endless CC-Rg.

Happy to hear from Vendors or even members with experience on these pads (daily and Novice track use).

Thanks!
Project mu is F960 R961

http://www.project-mu.co.jp/matching/pad/SUBARU.htm

I dont think Endless makes CC-Rg's for the 6pots yet.

https://endless-sport.co.jp/products...UBARU_WRX.html
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Old 09-11-2019, 10:02 AM   #3
JAgostoni
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Thanks, Yeeman19! Now the question is finding a distributor that carries them!

Anyone have comments on ordering from here?
https://www.nengun.com/project-mu/br...t-and-rear-set
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Old 09-11-2019, 10:15 AM   #4
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Old 09-11-2019, 12:11 PM   #5
subaru_gc8
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for the project mu, you should be able to go to any retailer and get them it might take a while to get them in stock though
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Old 10-13-2019, 05:08 PM   #6
JAgostoni
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Default Installed!

Endless MX72+
RCP112 (front)
RCP188 (rear)

Finally got these pads in and installed!

I ordered them from Nengun (from Japan) and got them in just a few weeks.

The fitment was perfect even though these pads are thick! They did NOT come with shims so I peeled them off the factory pads (looking for a more official source of shims).

While they aren't fully broken in yet, they are bedded in and the feel is certainly different than stock. Much more linear feel for sure but the stopping power is still there.

Also, no noise!
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Old 02-05-2020, 12:56 PM   #7
Yeeman19
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Glad to hear you found some pads.

Im not sure the shims are necessary; My Project Mu pads didn't require shims and worked fine without them.

Quote:
Originally Posted by JAgostoni View Post
Endless MX72+
RCP112 (front)
RCP188 (rear)

Finally got these pads in and installed!

I ordered them from Nengun (from Japan) and got them in just a few weeks.

The fitment was perfect even though these pads are thick! They did NOT come with shims so I peeled them off the factory pads (looking for a more official source of shims).

While they aren't fully broken in yet, they are bedded in and the feel is certainly different than stock. Much more linear feel for sure but the stopping power is still there.

Also, no noise!
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Old 02-08-2020, 04:53 PM   #8
JAgostoni
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Quote:
Originally Posted by Yeeman19 View Post
Glad to hear you found some pads.
Thanks! Going through winter on these now without any issues.

Quote:
Originally Posted by Yeeman19 View Post
Im not sure the shims are necessary; My Project Mu pads didn't require shims and worked fine without them.
Maybe not but I haven't had any noise

Which PMU pads do you have?
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Old 02-09-2020, 08:58 AM   #9
Norm Peterson
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Quote:
Originally Posted by Yeeman19 View Post
Im not sure the shims are necessary.
No, possibly, and be careful.

There's no guarantee that you'll get any noise without them present - or that you won't get any noise if they are.

What they also do is provide a little thermal insulation of the caliper pistons (and the fluid behind them) from the heat generated during braking (the shim being separate from the pad backing plate acts slows the conduction of heat, acting a little like insulation). This is mainly an issue if you track your car, but may be something to consider if you do a lot of driving in the mountains where the braking tends to be more severe than on flat land.

On the 'be careful' part - keep in mind that when you aren't running shims that the caliper pistons are sticking out further (by the thickness of the shim) at any given combination of pad and rotor wear. Mostly this doesn't matter until you get pads and rotors down to min thickness, where you'd have less margin against popping a piston out of its bore. Basically, don't run your pads or rotors all the way down to the specified min thickness; make your discard thickness about a mm thicker than spec if you're not running shims.


Norm
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Old 09-07-2020, 09:05 AM   #10
JAgostoni
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Pandemic be damned, I finally got to test these pads on the track.

Tl;dr Great as dailies, no fade on the track!


Daily
First, daily drivability is just fine with these. Frankly, they are minimal noise and ran fine through the winter.

On Track
Second, got them on a road course track which is notoriously a brake killer. On my first session, I ran the brakes so hard I came off with smoking brakes and boiling fluid. BUT, not a moment of pad fade all day! Frankly, I didn***8217;t cool off long enough as well after that session.

Moral: More agressive pads create more heat

I fixed my braking zones and was able to keep the system cool the rest of the track day (stock rotors and fluid). It was around 80 deg F.

Wear
During normal use, the pads are no more dusty than the stock Brembos. BUT, on track, the dust changed color, leaving me to believe they are chewing up the rotor. Not unexpected, to be honest.

Next up will be fluid and slotted rotors. Happy to hear any advice on that if you have it!
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Old 09-07-2020, 09:32 AM   #11
Norm Peterson
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Brake fluids, in decreasing order of wet boiling point. There are others, but these seem to get the most mention.

Castrol SRF
Motul RBF600/RBF660 (virtual tie but the 660 has a higher dry boiling point)


For sure, slotted rotors have an advantage on the street by giving little bits of grip better places to go than where they could score the rotors. Not sure if there's any advantage on the track over solid/plain rotors provided that your pads are capable of living at the temperatures your braking runs them up to.


Norm
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Old 09-07-2020, 09:53 AM   #12
JAgostoni
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Thanks! How much emphasis do you put in ***8220;brand***8221; of the brake fluid vs. stats like the boiling point? For example, Hawk, PMU, etc. all put out brake fluids as well.
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Old 09-07-2020, 10:26 AM   #13
Norm Peterson
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I think I've always chosen brake fluid based on boiling point, even back when I was only driving on the street and buying brake fluid off the shelf at the mass-market parts stores. Brand didn't matter as long as the temperatures were among the highest available. I was an engineer for most of my career (retired, these days), so buying on specs rather than advertising always came easy.

Once I started tracking one of my other cars, I've only looked for DOT4 fluids that met more specific boiling point specs, starting with ATE200. As I got faster, I started looking at fluids with still higher boiling points, feeling that it was better to have higher temperature fluid than what might simply "suffice".


Wet bp is more important in street driving where you wouldn't be periodically bleeding the brakes (like you would before or after each track day). Dry bp would be more important for regularly bled/changed fluid in a dedicated track toy.


Norm

Last edited by Norm Peterson; 09-07-2020 at 10:37 AM.
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