Arch, the softness in the pedal for Silicone DOT 5 after hot braking is
probably the air coming out of the fluid. When I get back from a trip
in a couple of weeks I will boil up a batch of DOT 5 and see what
happens.
Ted Schurman
73 Glacier VA
>
>
> SILICONE BASED DOT 5 FLUID
>
> However, for racing, use only a glycol-based racing brake fluid. Silicone
> fluid has been tried in racing, but it has a tendancy to give a spongy pedal
> after exposure to high temperatures. This is due to the slight compressibility
> of silicone brake fluid at high temperature. For ordinary street driving, this
> is not critical, but a racer needs all the brake-system stiffness he can get.
>
probably the air coming out of the fluid. When I get back from a trip
in a couple of weeks I will boil up a batch of DOT 5 and see what
happens.
Ted Schurman
73 Glacier VA
>
>
> SILICONE BASED DOT 5 FLUID
>
> However, for racing, use only a glycol-based racing brake fluid. Silicone
> fluid has been tried in racing, but it has a tendancy to give a spongy pedal
> after exposure to high temperatures. This is due to the slight compressibility
> of silicone brake fluid at high temperature. For ordinary street driving, this
> is not critical, but a racer needs all the brake-system stiffness he can get.
>