Pad Knockback Issue

[stab6902]

Interesting you bring up seal design. I believe the seals are square cross section orings, likely with a brake caliper specific "squish" specification, possibly based on the D154 GM caliper it is descendent from. I can ask Wilwood. What about the seal design in your opinion affects drag potential? Deflection of the seal and non linearity at low fluid pressures? If so that could be the cause of the lack of reaction force to piston compression and thus the knockback @ 2 psi.



Ryan

I'm not an expert on caliper piston seal design, but as far as I know, they are all square in profile, and the design of the seal groove has more of an impact on behavior than the seal itself. Here's a white paper on the topic if you're interested in more detail (not my paper btw, just stumbled on it looking for figures to illustrate what I'm talking about): http://www.simulia.com/download/solu...c03_delphi.pdf