So brake experts.. need some input...
I run Stock R33 GTR Brembo calipers... DBA5000 discs, braided lines, Removed stone shields, Master cyl stopper... with RBF600 fluid and DS2500 for street and DS3000 for track.
Everyday driving/street on the DS2500 the pedal is reasonably hard, good feel, and gives me confidence.
For track days i change pads from the DS2500 to DS3000, as soon as i get back in the car after changing pads, the pedal feels softer... a bit spongy... Now since the only thing i'm changing is the pads, You'd have to assume its the pads, or the pads not bedding to the discs properly... At the track the pedal is soft as well... so coming up to a corner i'm on the brakes much earlier than i should be at about half pressure, if i jump on them to hard the pedal just about hits the floor and i have to take a 2nd stab at it....
It's not pad knock off because i tap the brakes with my left foot before jumping on them for big stops....and even when i take a 2nd stab at them the pedal is never hard.
Now the weird thing is i found i had a hard pedal at one particular corner at Phillip island.... Turn 5.... not sure why... not a high speed stop really....
Now after the track day i put my Street pads back in DS2500 and the pedal seems to be hard again.... coincidence?
Options i have: Rebuild the calipers? Replace/reco the master cyl? Replace the Brake booster?
First thing i'm thinking of doing is putting a brand new set of pads in (i have a new set of DS3000 sitting in the box at home).... and see if the pedal is hard with those in....
Any input/suggestions welcome...