[a427sc]

Hey Scott. Your really getting serious with that FIA. I had a similar knock back problem with my ERA with the outboard brakes. I went with 4 piston AP's in the rear, and would get a low pedal after a long corner or a series of switchbacks when I went back to the brakes. My problem was the Jag taper bearings ERA uses. Can't get them too tight or they seize, and that leaves room to wobble. Joe Rodimista's FIA has the same rear, but uses the Vette floating calipers ERA uses. No problem there. I called Essex Racing, the AP dealer, and spoke to their lead engineer about the problem. I wanted to try floating rotors. He said the pressure required to move the rotor on the pins was enough to also move the pads on the outboard side of the calipers when the bearings wobbled. Then the rotor would runout inconsistantly. The bearing runout was the problem and was not fixable, at least with what I could do. He suggested a 2psi residual valve in the line. This would seal the caliper, making the inner pads move in conjunction with the outers, maintaining their position to the rotor. Not the ideal, but inexpensive and easily doable. I never ran the car after that (sold it last November) so I'm not positive how well it works. Good luck

Don