This is for a Turbo, with everything standard except Mintex 1144 pads.
The problem I have is with braking on track. Much (but not all) of the time I get about 50% of what I expect brake-wise when pushing the pedal fairly hard. After a short time (or perhaps with greater pressure) the pedal then 'gives' (it feels something has unstuck and the pedal depresses another centimetre or so), at which point I get excellent braking. Note that sometimes I get good braking from the start. I figure this can't be related to the pads or the lines, or even to one of the calipers sticking (the car isn't unbalanced side-to-side either before or after the pedal 'gives'). It's not obviously related to brake temperature either (and happens with fresh DOT5.1 fluid). Could it be the master cylinder?
I wondered if anyone has experienced the same problem, or otherwise has any advice on what might be causing it. I'm also interested in recommendations for Lotus / track specialists not too far from Cambridge who might be able to assist.
On a related note, is there much value in fitting braided lines?
Thanks in advance.