Brakes

Started by PJ Runnells, Apr 13, 2026, 02:40 PM

Previous topic - Next topic
Go Down Pages1
User actions

PJ Runnells

Customer
*
Newbie
Posts: 8
State: CO
City: Gunnison
Logged
Apr 13, 2026, 02:40 PM
Is anyone running a residual valve on their brake systems? I'm having some pedal bleed down. Have to pump pedal after a bit. Thinking I might need a residual valves.  7/8 Willwood master cylinder was stoptech brakes.

Ron Sutton

Race Car Designer
Administrator
*****
Full Member
Posts: 172
Location: USA
State: Florida
City: Ocala
Logged
Apr 13, 2026, 06:53 PM
#1
Quote from: PJ Runnells on Apr 13, 2026, 02:40 PMIs anyone running a residual valve on their brake systems? I'm having some pedal bleed down. Have to pump pedal after a bit. Thinking I might need a residual valves.  7/8 Willwood master cylinder was stoptech brakes.

Typically, as long as the master cylinder is higher than the brake calipers, when you have some pedal bleed down, there is some air in the system. Using a power bleeder that pushes the fluid & air out of the lines & back in the master cylinder reservoir is the best way to fix it. If you try & just can't get it, running 2# residual valves is a fix. Not ideal, as it it creates a little drag in the brakes.
I'm a veteran racer & race car designer committed to staying on the leading edge of racing technology, for one reason, to win. Everything else is BS. I'm only semi-retired because I still love helping build bad ass race cars.

While engineering, geometry, trigonometry, physics & more affect everything in race cars, I do my best to make the complicated easier to understand. One of my racing friends said, "Ron is a race car designer that did not go to engineering school, so he speaks car guy."

PJ Runnells

Customer
*
Newbie
Posts: 8
State: CO
City: Gunnison
Logged
Apr 13, 2026, 07:17 PM
#2
Awesome will try the power bleeder.
Thanks Ron
Go Up Pages1
User actions