if you are sure its the calipers, then this is very long shot but could someone have replaced the seals and put them in the wrong way round ? I never done this on the m4 but have on some old P4 calipers and its easy to install the seals the wording way round which can lead to
I bought them brand new from Italy so if there seals were in the wrong way round then I'm guessing it was done at the factory which would be very odd. I even though it might be the anti-chatter plate which is putting too much pressure on the pads thus not making them return properly....reckon it could be safe running without that plate?
could the discs and pads be overheating? If itsonly happening on track. Any difference in braking performance at the end of the session?
I'm sure the whole system is overheating, probably cause by the root of the problem in the first place....excessive drag due to brake caliper binding. The actual performance is pretty constant during the whole session with the carbon pads, the GPFAX being sintered heat up fare more and tail off towards the end of the session.
I thought it might be the pad springs as they're always pushing down on the pads and might not allow them to move freely enough back. I've never had a set of pinless calipers before and always thought they (springs) were a necessity until I realised what they are....they're actually "anti-clatter" springs. Things is, without the anti-clatter springs pushing down on the pads to keep them in place....any chance head shake or a slapper will knock them about enough to affect braking at the next corner?
I run PT radial calipers on my race 748 and brembo 30/34 on my 620 race bike. The brembo have the springs removed and PT calipers never ever had springs fitted from new. I have not died yet.
