[DeTomaso] Wilwood Brakes WTF????

[Pantdino]

But the sealing function is lost only when the pedal is at the full up position.  At that point the fluid in the master cylinder reservoir is in continuity with the fluid in the master cylinder., but as soon as you step on the pedal at all the master piston moves past that little hole and the bore is a closed space which decreases in size as the pedal is depressed.   As the master cylinder piston retracts from "on hard" to "lightly on" positions, a slight "suction" will be produced which will tend to pull the caliper piston back a bit. 

But what I was told is that it is the deformation of the seals that does most of the caliper piston retracting.

-----Original Message-----
From: richard bosch <theemonkey at yahoo.com>
To: detomaso <detomaso at poca.com>
Sent: Thu, Apr 18, 2013 7:17 pm
Subject: Re: [DeTomaso] Wilwood Brakes WTF????


The master cylinder piston and seals are designed so that the sealing
function is lost when the piston travels back from the "brakes on"
position. Also, the seals allow fluid to run past them as long as the
brakes are not applied. 

Tomas

Maybe that is the difference.Maybe the "race" brakes and some American designs 
do not have the "one way" seals and that is why they require the residual 
pressure valves.
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