After the master cylinder upgrade, as others have reported above, I noticed a slight improvement in the brake pedal feel; it's not as squishy as before.
But, not all the time. After driving for a while (30 minutes or so) the pedal noticeably gets spongy again. The funny thing is that if the car is given a decent rest it firms up. This leads me to believe it is heat related - possibly the rubber in the master vacuum warming up? That corner of the engine bay does get pretty hot.
Anybody else noticed this? Only me?
