Does anybody know the stock brake pad friction coefficient?

 

If you find out, especially in comparison to the Zeals, let me know.

 

That sentence doesn't make sense . I'm just wondering because I know the Porterfields have a friction coefficient of 0.4. Oh yeah, EricL, you have a PM from me on the TL board...

 

Was running to the door -- look again...

The reason I mentioned the Zeals vs. the stock pads...

Tim put on the new ACP rotors with stock pads *and* a person over on the TL forum recently put on the ACP rotors WITH the Zeals. In both cases, the cars stopped much easier and the grip felt better. I've never had a problem with feel or ultimate grip, but the Zeals are supposed to be great. I know someone with the Porterfields and have driven the CLS, and they also feel great, but very similar to mine in brake pressure vs. retardation of motion and in general feel (the Porterfields are R4S with slotted disks (the ones Tim used to sell with the slots, slots & x-drilling, x-drilling) front and rear.


There is one item that does make me wonder, and that concerns the linearity and relationship of CF with temp, rotor material, and other factors (especially break-in techniques to help bed the pad). As a general indicator, I can see how CF would give a rough idea as to how the pad would grab. But, pads are rather temp sensitive, and they are also can be non-linear in friction vs. clamping force, so I would like to know, but I wonder how much stock to put in that figure -- as is.

 

My friend says that most OEM pads have a coefficient of between 0.2 and 0.3 as well as a temperature tolerance of up to about 700 C. Dunno if thats correct or not...

 

theres some dude on clubsi (who is supposedly a respected tuner and knows his stuff), who said that the factory pad on the civic was 0.32 or something around there. he compared it to a bunch of aftermarket pads and the factory pads were much lower than the rest

makes sense