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Old 10-06-2008, 06:25 PM   #1
997gt3north
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Default uneven left vs right rear brake pad wear

- figured this was the forum to ask the question on
- my car 997gt3 with ceramics but running the motorsport green pads

- the stock pads were wearing very fast so i decided to try the greens (went through 5 sets of the stocks)
- the greens definitely last longer (much longer) but i noticed something with these greens that didn't happen with the stock pads (maybe because they went so fast, maybe it was because i was running a bunch of different tracks, maybe i'm trail braking more as i get faster, maybe the Paul Guard 50/80 LSD is causing it)

the issue
- the left rear pads were much more worn than the right rears
- i have done a bunch of days (almost all at Mosport in Toronto)
- Mosport is a clockwise track

- can anyone explain why the left side rear pads would wear more than the right side?
- i have some guesses but i would like some feedback from the track pros


thanks


paul
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Old 10-06-2008, 07:03 PM   #2
RonCT
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Traction Control on or off?
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Old 10-06-2008, 09:24 PM   #3
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Traction Control on or off?
always off
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Old 10-06-2008, 11:17 PM   #4
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When you say much more, are we talking about like 20 to 30% more? i I have never seen a left right differential. Thinking trail braking and turning left would cause more load on the outside left but I don't think that can explain it. check the location and condition of the pad retaining spring on the left. if it was not centered it could cause some excessive wear, otherwise I am clueless.
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Old 10-07-2008, 12:11 PM   #5
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Originally Posted by todinlaw View Post
When you say much more, are we talking about like 20 to 30% more? i I have never seen a left right differential. Thinking trail braking and turning left would cause more load on the outside left but I don't think that can explain it. check the location and condition of the pad retaining spring on the left. if it was not centered it could cause some excessive wear, otherwise I am clueless.
- this is the first time i've seen this
- left rear pads maybe 2mms left
- right rear pads 6mm left
- fronts as usually more like 8 to 10mm
- the Motorsport Greens come about 2-3mm thicker than the stock ceramic pads which have about 10mm of material when new

- i check if the pistons on both rears and everything appears to be working

- what i'm left with is thinking that it must be trail braking on a clockwise track (left side wheels turning and braking more than the right side) and when i added my Paul Guard 50/80 LSD it has allowed the car to be even more stable under braking and thus i must be using even more trail braking

- if this isn't it then i must have left the tc button a few times and missed it
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Old 10-07-2008, 12:11 PM
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