Quote:
Originally Posted by Gonzo
Todd 10 lbs residue valves & springs behind the pistons will not help your knock back issue.. I worked for Wilwood in the research & development dept for 10 yrs!!!
I have asked you to send me in all your specs on your whole complete brake system.. Pics  I am pretty sure I can help you resolve your issue!
You will create brake drag with residue valves or springs behind your pistons!
Residue valves were built into OE master cylinders when drums were standard equipment on cars.. they consists of a one way valve.. which held pressure when drum brakes retacted back from when pedal was released.. They are also heavily used when a master cylinder reservoir sits below level of the calipers @ the wheels.. When the reservoir sits below level of calipers the brake fluid will drain back into the master cylinder reservoir.. 10 lbs for drums & 2 lbs for disc brakes..
Springs behind pistons have not been used for a long time in production OE cars.. The caliper designs of today do not require them.. I remember when Wilwood used to use them on Winston Cup calipers 15 yrs ago for the same purpose that you are stating of eliminating piston knock back or when the caliper that were used from 65 to 81 Corvettes(J52 option if I remember correctly).. Cup seals with a piston design that would float in piston bore.. Piston to seal design has come a long way since then..
Steve Rupps Bad Penny ran Wilwoods for some time... He has never complained about piston knock back to me!! He is running Baers on Penny now but not cause they were a bad brake system with issues!! |
I'll take you up on that. PM sent.