Are Carbotech XP10/XP8 pads position sensitive? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

torqdork · 08-23-2013, 07:05 PM

While installing the XP10/XP8 Fr/Rr I recall a letter, possibly an "I" stamped on some pads, but no directional arrows or other markings. Does it matter how they're installed forward/backward/inner/outer?

Possibly related to this, after proper bedding in at the local airport the ABS has come alive under hard braking with Potenza RE-11A's. I'm wondering if pad placement has anything to do with it, or is it due to higher performance pads generating more clamping force or something expected with XP series modulation? The ABS was nowhere near as active with OEM pads.

TIA...

CSG Mike · 08-23-2013, 07:34 PM

No, they're not.

You're getting more ABS action because you're braking harder, but with staggered compounds. The same pedal pressure will generate substantially more pedal pressure (nearly double the friction), and the EBD is trying to compensate for the difference in braking at the front and rear axles.

Effectively, you can step on the brake less to get the same braking force, so you should have a nice big range for modulation.

OrbitalEllipses · 08-23-2013, 07:45 PM

Quote:

Originally Posted by CSG Mike

Effectively, you can step on the brake less to get the same braking force, so you should have a nice big range for modulation.

Do you recommend this one:

Or this one?

torqdork · 08-23-2013, 09:25 PM

Quote:

Originally Posted by CSG Mike

No, they're not.

You're getting more ABS action because you're braking harder, but with staggered compounds. The same pedal pressure will generate substantially more pedal pressure (nearly double the friction), and the EBD is trying to compensate for the difference in braking at the front and rear axles.

Effectively, you can step on the brake less to get the same braking force, so you should have a nice big range for modulation.

Thanks Mike, makes sense since it's the fronts that are trying to lock with the same pedal pressure as OEM pads.

TouchMyHonda · 08-23-2013, 09:31 PM

I'm running xp8's front and rear and my abs is for sure more lively.... Especially since I am on stock tires still hahah. Totally normal my friend.

Acree · 08-23-2013, 11:52 PM

So why the staggered compounds?

08-23-2013, 07:05 PM	#1
torqdork Senior Member Join Date: Apr 2013 Drives: RV-7 Location: Out West Posts: 1,818 Thanks: 1,042 Thanked 893 Times in 562 Posts Mentioned: 45 Post(s) Tagged: 1 Thread(s)	Are Carbotech XP10/XP8 pads position sensitive? While installing the XP10/XP8 Fr/Rr I recall a letter, possibly an "I" stamped on some pads, but no directional arrows or other markings. Does it matter how they're installed forward/backward/inner/outer? Possibly related to this, after proper bedding in at the local airport the ABS has come alive under hard braking with Potenza RE-11A's. I'm wondering if pad placement has anything to do with it, or is it due to higher performance pads generating more clamping force or something expected with XP series modulation? The ABS was nowhere near as active with OEM pads. TIA...

08-23-2013, 07:34 PM	#2
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,562 Thanks: 8,942 Thanked 14,211 Times in 6,854 Posts Mentioned: 970 Post(s) Tagged: 14 Thread(s)	No, they're not. You're getting more ABS action because you're braking harder, but with staggered compounds. The same pedal pressure will generate substantially more pedal pressure (nearly double the friction), and the EBD is trying to compensate for the difference in braking at the front and rear axles. Effectively, you can step on the brake less to get the same braking force, so you should have a nice big range for modulation. Last edited by CSG Mike; 08-23-2013 at 07:51 PM.

08-23-2013, 11:52 PM	#6
Acree Senior Member Join Date: Jun 2012 Drives: 13 CSB BRZ Ltd Location: United States Posts: 1,035 Thanks: 147 Thanked 530 Times in 286 Posts Mentioned: 39 Post(s) Tagged: 0 Thread(s)	So why the staggered compounds? __________________ 2011 BMW M3 (No torque dip) 2013 Subaru BRZ - SOLD - Build Thread

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