WTF is wrong with my brakes?

BGTV8 · 01-30-2022, 02:33 PM

Quote:

Originally Posted by fairladyATX

Yes, I installed the brake ducts specifically for this weekend. 2.5" air inlet and ducting.

So -- riddle me this. What actually happened to cause the fade?
Did the fluid boil? Did the rotor or pad temperature get too hot to be effective?
Would the brakes have been fine for another session after they cooled?

Pedal going soggy says you've boiled the fluid.

You would need to bleed the brakes before the next session.

I regularly track my Z (and race an historic V8 MG) and baseline brake fettling was to remove the backing plate, install 3" ducting from the front fascia (mine is an '09 model and there is a neat hole in the fascia to use) and I use a variety of "club-spec" pads - I do not use a full race pad in the Z because they are too aggressive - the Z is not my race car after all.

Track day fettling is to install the track pads, bleed the brakes, stiffen up the shocks and go have fun in 20-minute blocks.

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