When to replace track pads

[rickdm]

I use my '87 Carrera mostly for DE's, and I was checking the rear brake pads on the car (Pagid Blacks), and they are the same thickness as the backing plate (about 2/3rds worn down). I have been getting great wear out of these pads (10 DE's), but is it time to replace them or can I go another weekend? These are 930 rear calipers, so overheating has not been an issue, though I know how much more heat a thin pad can transmit. The car is up on stands so any suggestions would be appreciated.

Thanks,
rickdm

[Bill Verburg]

The usual recomendation is 50% because of the heat issue

[Grady Clay]

rickdm

At 2/3 worn I would certainly replace them. I agree with the 50% philosophy. It is false economy to stretch those parts for track use. With good 50% pads I would carefully mark them and save for emergency install. You could spill brake fluid in an almost new set just before a session and then you have a proper set already broken in to use to recover.

Your rotors need similar attention.

At each change it is useful to cycle the pistons in the calipers.

Best,
Grady

[Craig 930 RS]

When the center groove is gone, the bonding rivets are not far behind - and is then time to replace.

At least that is what I've heard form a few hundred customers ;-)

[Dantilla]

On my 944 I have noticed that as the pads wear, they wear faster.

New pads will use less than 10% on a track day. the last 30-40% can go all in one day.

[rickdm]

Before reading your posts I went outside looked at the pads again and decided to do what you all suggested. It does seem like a false economy to get one more DE out a set. My front pads are a little thicker than the plates so I left those in, but I will watch them closely at the track.

How do you cycle the pistons in the calipers?

Thank you,
rickdm