Drag Racing Discussions > Front Engine Dragsters
Wilwood rear disc brakes
RacinJacin:
Wilwood recommends a 2lb residual valve be used when the m/c is at or below the height of the calipers. Wilwood recommended it - so that's how I did mine - no problems yet. I run the dynalite calipers and their M/C with a lightweight pedal.
AS for some of those "puck" style brakes. A fellow I knew ran them and spit a puck out right before a big race - it was the style where a small band of aluminum ring in the caliper is what kept the puck in place. That narrow band sheared off and out went the puck. As a band aid I c'bored the caliper and made a steel sleeve to press into the caliper - 1/2 in 1/2 out. Now you had to either shear off a WHOLE bunch of aluminum or that steel ring in half. Even so I told him to throw those calipers away first chance he got. I would NEVER run that style of brake caliper.
ricci32:
In the mastercylinder its self there is a built in residual valve on the end of the piston there is a cup with a circular group of holes and a rubber flap over the holes I have been told by in the past on my dirt modified to remove the rubber flap especially if you are usinig residual valves. I have never had to use residule valves.
ricci32:
The problem i was having was a draging of the brakes and brake fade and loss.
masracingtd1167:
I use the Wilwood brakes on mine without any check valve unless it is in the master . It is mounted below the callipers . The only problem that I have had is the transfer of metal from the pad to the rotor but they never drag .
dreracecar:
Airhearts had puck retractors in the caliper pistons--- nothing but a pain
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