Need a little help on this one. Put on new powerslot rotors, Racing Brake ET800 pads, and fresh ATE Super Blue fluid before heading out to Road America last fall in the FD. The car was very tail happy under hard braking and would engage the rear ABS very quickly, limiting my braking ability. I chalked that up to running on non optimal street tires (Fuzion ZRi).

As I am prepping the car for Gingerman next week, I inspected the brakes and found the brand new rear pads were toast. Roughly 2mm of pad material left! The fronts are perfect, barely wore at all. No heat spots to indicate the pads were dragging and no taper. I do have the 929 MC and the pedal feels great thus I do not believe any air is stuck in the system or the M/C is leaking internally past the front seal.

Prop valve bad?
ABS pump solenoids blocking front flow?


What else would limit front pressure or provide excess rear pressure? If there is a problem I'd like to find it before chewing through a set of DTC-60's...

 

odd, i've seen cases where once the rear is bled, you can't bleed the front very well because the pedal doesn't travel very far, i either bleed the front first, or go around twice, its an easy fix.

its unlikely to be the ABS, as the unit basically is straight thru when its off. could be a prop valve i guess.

tire pressure and alignment is worth a look too.