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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.

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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TR PhotoStudio-Motorsports Photography
NASA Licensed Instructor-HPDE 4

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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NASA-SE Instructor, TT
1992 Corvette 383 - TTA
2012 season 383 going in March

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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walter

'91 crx TTE

WNC

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.

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.

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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Keith
82 911sc
GTS3
99 SM

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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89 Honda CRX Si

haven't been able to find any new ones for my crx ... only reman... worth the price ?

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walter

'91 crx TTE

WNC

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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NASA-SE Instructor, TT
1992 Corvette 383 - TTA
2012 season 383 going in March