QUOTE(stownsen914 @ Sep 25 2007, 11:02 AM)
QUOTE(jdogg @ Sep 25 2007, 09:17 AM)
Is there any way to limit that knock back?
Are you sure your rotors aren't warped? Also, check your wheel bearings. If they have any slop, the wheel can cock back and forth slightly between braking zones, and knock the pads back in the process. Either problem could occur at the front or the rear, but the front would be more likely, I would think. Good luck!
Great suggestions! Bearings are new, no slop. And I would think I would feel a warped rotor, especially under threshold braking...I suppose it would be worth putting a dial indicator on the rotor face and checking it for runout to be sure.
Let's talk some more about the stock 914 rear calipers. It has been a while since I rebuilt them, and I can't remember exactly how everything works back there. I currently have the venting clearance set to .06 (pins and spring clip removed), but have not had a chance to see if that has changed any after being on track. Anyway, I guess that as the pads wear, the adjuster must turn with it forcing the piston out to compensate for pad wear and maintain the venting clearance, right?
So, in a high wear environment, is it possible the adjuster can't keep up with the pad wear?? Of course, all of the preceeding conjecture could be null and void when I pull a wheel and check the clearances....just thinking out loud..