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Hey guys, attached are some pics of my front driver side pads that came out of an S13 Silvia (CA18). I’ll detail the setup and my questions below.

PADS are QFM A1RM

Car has only 165rwkw and runs around 1:43 around Winton.

Runs Federal 595 RS-R Rubber (235 R17s)

Runs TRW Lucas 600 Fluid

Runs RDA Slotted/Ventilated Rotors up front, solid slotted rears

Runs S15 calipers up front, standard rear

Runs R32 GT-R Master Cylinder

Standard brake lines

Pads have done about 5 track days, 1 drift day, and 2 DECA days and very minimal street driving. All up under 2500ks total.

Why would only the inner driver side pad wear like this? The passenger side pads show wear similar to the outer pad from the driver side and appear to have some meat left. Rear pads are fine.

There’s clearly something amiss here to have that much difference in pad wear from the inner to outer pad, as well as such different pad wear side to side as the passenger side shows even wear inner to outer pad.

Thoughts?

post-23873-0-33870100-1317618020_thumb.jpgpost-23873-0-40618000-1317618043_thumb.jpg

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Firstly, you got MAX life out of them, they're rooted! lol

How are your wheel bearings? The hub moving under load in turn causes one pad to contact, causing wear.

Also, your calipers probably need a clean up and some new seals thrown through them, you could well have one piston thats a bit stickier than the other.

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  • 4 weeks later...

Heat.

Turbo silvias have a big vent for the intercooler on the front left and no vent on the right so your right inner pad is probably getting hotter than the inner left.

The pad is still wearing fairly evenly though it's a bit hard to say for certain when they are that low because they tend to fall apart...

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I've cut slots into the inner guard on the right side as well as I noticed that difference.

However the right side has my oil cooler so hot air could be flowing through. Might be worth making up some basic deflectors for the LCAs

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  • 4 weeks later...

Further to this, pulled the rotors to have them machined. Noticed that the side that had worse pad wear also has noticable more rotor wear, to the point where the slots on the inner side of the rotor looked fairly wiped and may not come good with a machine.

Still sound like a heat issue? I couldn't detect any deflection in the wheel bearing but I note the tie rod ends dust boots are split.

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