FlyinTomato

My brake rotors have lips on the outer edge. I would say the size is almost 1mm. Is this the end of their service life? When I bought this car last year, the guys did the PPI thought the brakes were still good. I've since drove less than 3k miles.

Also, my front pads generate enormous amount of brake dust. I dont know if they are oem that's on the car now.

Guess i'd like to change them at some point.

Where is the best place w/ best price to buy these brake components?

911Jetta

I just had new tires, rotors and pads installed.

After a couple years of service, many spirited drives and a couple track days, I too thought my rotors needed replacement. They had a slight lip on them also and I willingly sought to have new rotors installed all around since I want the car to be ready to take to the track on a moments notice.

When I picked up my car, the technician (who works on a lot of track P-cars) said the rears measured fine and would still be good for at least another year or two. In the same breath, he said the 964 hardly uses it's rear brakes...

If they measure fine, leave them.

Vandit

Bust out a caliper (the measuring kind) and measure the rotor thickness.
https://rennlist.com/forums/964-foru...tml?styleid=13

sc

I'm in need of replacements myself. Jetta where did you source your rotors/pads? Did you go OEM?

911Jetta

Changed -
Front rotors: Zimmerman Coat Z corrosion protection
Front pads: Hawk Performance Ceramic Brake Pads

In-spec. (therefore not changed) -
Rear rotors: Zimmerman Coat Z corrosion protection
Rear pads: Textar (few choices for stock '90 dual caliper brakes)

I also had the brake pad dampers reinstalled (mushrooms), now the brake squealing is gone.

I was surprised that my car has mixed brand pads, and will need to have a quick look over my invoice to confirm that is true.

sc

Super! TFS!

Goughary

Question re: 964's not using the rears much. What's the best way to add a bit of rear bias? Aside from increasing caliper size...

I went with sebro rotors last time I changed them. I don't track the car much so no need for the drilling for extra cooling and I figured in winter, more likely to crack the zimmermans when the car gets iced over.

Vandit

Increasing rear caliper size from the OEM 2-piston to 4-piston actually reduces rear bias if all else is left unchanged (i.e. 45bar valve).

If your car already has the 4-piston rears (all C4s and '92+ C2s), then you have the 55 bar valve. If you want more rear bias beyond that, get a 65 bar valve or gut the existing valve entirely.

More info.
https://rennlist.com/forums/964-foru...tml?styleid=13

Goughary

Thanks vandit. I remember seeing that thread a while back..perfect.

911Jetta

I got the non-drilled Zimmermans.

Rocket Rob

+1 - Check the rotor thickness before deciding to replace them. If memory serves, you have 1mm of wear material on each side of the rotor. I just checked the workshop manual. The front rotors are 28mm new and the wear limit is 26mm. The rears have a similar wear limit. If you have a 1mm lip, then most likely, you are due for a new set.

FlyinTomato

sigh.. Just found that my micrometer is too small for the job. range is 0 - 1 inch