View Single Post
Old 12-08-2020, 09:11 PM   #15
zeroomega
Member
 
zeroomega's Avatar
 
Join Date: Jul 2018
Drives: Supra MKV, FR-S
Location: Bay area, CA
Posts: 76
Thanks: 22
Thanked 78 Times in 32 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by jacjac3 View Post
Installed the wilwood shims.



Prior to bedding, the brakes were quiet until u start using them. 1-2 times is enough to make them squeal like crazy.

I went to bed the brakes using the following procedure.
Using 60-80% of pedal pressure, decrease the car speed from 80 km/h (50 mph) to 20 km/h (12 mph). Repeat this process 7-9 times.
Do not drive the car to a complete stop as this will increase rapidly the temperature of the pad.
Repeat the procedure from 120 km/h (75 mph) to 80 km/h (50 mph), and from 120 km/h (75 mph) to 20 km/h (12 mph).

After bedding they SCREAM!!

The rotors looked like this after I cooled them down by driving on the freeway for 10 min


I'm not sure if this means the pads are overheating or I need to continue the bedding process.

Any ideas?
I have AP Racing endurance kit on my FR-S with Carbotech XP8 pads. They sounds like a screaming banshee no matter on street or track and no matter how hard I tried to bed them in. But the combo works great on track, I have zero brake fade with 30-min sessions at Laguna Seca and the rotor wear is minimal.

For street driving (which I rarely do on my 86 now), I currently use StopTech Sports 309 pads (yes there is a pad shape matches AP racing calipers) and they are almost silent on street. They should withstand higher temperature than Carbotech 1521 pads and they are almost half the price. The parts numbers are:

Front (for CP8350 caliper): 309.80210 (which is usually under $60)
Rear (for non-brembo 86): 309.11240

I do have to remove the shim came from front brake pads to make them fit but still they are almost silent on street. Hope this info helps you.
zeroomega is offline   Reply With Quote
The Following 3 Users Say Thank You to zeroomega For This Useful Post:
jacjac3 (12-10-2020), jflogerzi (12-11-2020), new2subaru (12-26-2020)