I am working on a CSX1000 (427 Style) Shelby. It uses an (I believe) Afco master cylinder and an original style Girling external slave cylinder. This is a very common setup that Shelby sells and uses on the majority of their cars. It typically takes 5 minutes to to get them completely bled and adjusted. However, on this car we have been having issues with too much free play in the pedal. This isn't what I would call your typical free play. It almost seems like there is too much slop in the master cylinder. We are seeing probably 2-3" of pedal movement before the pedal pushrod acts on the master cylinder piston.
This is the second master cylinder we have put on the car. The first master cylinder did the same thing, so Shelby replaced it under warranty. I had initially thought it was an issue with bleeding all the air, so I took a suggestion and put the slave lower than the master cylinder (then bled it) in hopes that there was an air bubble trapped, but no dice. It is now looking like the master is bad, but I doubt we got two in a row. Maybe we need to bench bleed the master?? I have never had to do that, but I am running out of ideas?
Anybody have any thoughts or experience anything like this?? I am considering calling Afco next.
Thanks!
