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PostPosted: Fri Mar 02, 2012 10:47 am 
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The outer passenger pad is worn diagonally from the front top corner to the center of the pad. The inside pad is not abnormally worn. I am replacing both calipers. I've had to replace the front calipers pretty much once per season. I was just concerned about continuing to use the pad.

I'll consider getting XP10's once the 8's are done. I'll have to figure something out for the rears. Currently using Hawk HP+'s for the street and track on the rear. There are not a lot of available options. I drive a Ford Escort ZX2 (2400 lbs) turbo charged to 200fwhp. I'm using 300 tread wear summer tires; KDW's and now yokohama S. Drive's.


Last edited by BernardZX2 on Fri Mar 02, 2012 11:26 am, edited 1 time in total.

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PostPosted: Fri Mar 02, 2012 10:54 am 
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I would not think that your car on those tires would overwhelm XP8's...I never got any fade on them in my car at CMP on R comp tires.

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PostPosted: Fri Mar 02, 2012 12:47 pm 
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BernardZX2 wrote:
The outer passenger pad is worn diagonally from the front top corner to the center of the pad. The inside pad is not abnormally worn. I am replacing both calipers. I've had to replace the front calipers pretty much once per season. I was just concerned about continuing to use the pad.

I'll consider getting XP10's once the 8's are done. I'll have to figure something out for the rears. Currently using Hawk HP+'s for the street and track on the rear. There are not a lot of available options. I drive a Ford Escort ZX2 (2400 lbs) turbo charged to 200fwhp. I'm using 300 tread wear summer tires; KDW's and now yokohama S. Drive's.


This is part of your issue. The HP+ puts a different compound layer on the rotor than the Carbotech.

Try using your XP8's on the street, or use the Carbotech street/autocross pads. Your xp8's should be fine for the high treadwear tires. You can try xp10's later. The xp8's on the street will be no worse than the HP+ pads on the street.

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PostPosted: Fri Mar 02, 2012 1:55 pm 
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or swap rotors at the track ...


I use xp10's on my CRX no problems ( or hawk dtc 60's when I'm low on funds.... and yeah I have rotors for each )

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PostPosted: Fri Mar 02, 2012 5:13 pm 
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I use HP+'s on the street front and rear. For track weekends I swap the front rotors and pads for the XP8's. I leave the rears alone.


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PostPosted: Fri Mar 02, 2012 5:59 pm 
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trhoads wrote:
I would not think that your car on those tires would overwhelm XP8's...I never got any fade on them in my car at CMP on R comp tires.


Yeah, at that weight and HP 8's should be fine. If you did have a sticking caliper piston, it could account for why the pads look like they have been very hot. A dragging pad (piston not releasing properly) will generate a lot of heat.

Also what was said about mixing and matching pads on the same rotor. Not the best thing to do. Transfer layer from a previous pad is not going to work as well when you swap to a different type.


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PostPosted: Sat Mar 03, 2012 5:38 am 
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FWIW many Spec Miata drivers use XP10 front and XP8 rear. I have seen the same uneven wear as well. Sometimes I'll flip the pads around to even out the wear. I have never had any braking issues associated with uneven pad wear. The calipers on a Miata are single piston and I rebuild them every season. Rebuilt meaning, new seals and boots, hone the bore. Many people replace them since they are relatively inexpensive. It just does't take that much time or effort to do it yourself if you have the desire. The uneven wear doesn't go away after a rebuild.

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PostPosted: Sun Mar 04, 2012 6:02 am 
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I just went through the same thing with my calipers, after talking with jeremy , I had flex in my calipers ,new one have been installed for this up coming event, In Dec we rebuilt then still ended up throwing them away after event along with the rotor , If you run stock better off to purchase new sets , but it is better to buy after market upgrades for the reigidity and stopping power .

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PostPosted: Sun Mar 04, 2012 4:18 pm 
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haven't been able to find any new ones for my crx ... only reman... worth the price ?

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PostPosted: Mon Mar 05, 2012 6:20 am 
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retlaw wrote:
haven't been able to find any new ones for my crx ... only reman... worth the price ?


Here is how I do it for my calipers:
Measure several places between the inside and outside on the caliper.
Write them down, take list to autozone (or wherever) have them pull a set from the rack.
Pull the set out and see if the measurements are better or worse.
Worse = pull another set from the rack or go to another location.
Repeat until you ger a better set.

That is why after the motor and seat and harness a big brake package is next.
I'm tired of wasting days trying to find a good set of calipers.

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