What would cause brakes to lock up?
I had my car at the track a few weeks ago, I was on a pass and could feel the car slow up and could hear the motor was under a load. I knew something was up cause the car usually traps 6,500 rpms and this pass it went through around 6,200. As soon as I crossed the stripe, I let off the throttle, I hadn't even hit the brake pedal and the car was slowing way down, I had to down shift to second and give it throttle just to get it up to speed. By the time I had for my slip and was heading back to the trailer I had it in 1st gear around 1/2 throttle just to get it to move.
When I got to the trailer all you could smell was burning brakes, i walked around the car and touched all 4 wheels and all of them would burn the tips of your fingers.
I loaded it up on the trailer and took it home.
When I got home, I unloaded the car to put it into the garage the brakes had freed up, came of the trailer fine, and went into the garage fine.
The only 2 things I noticed was the MC was empty and i saw a leak line leak in the rear.
I am running 94/95 brake booster and master cylinder, 94/95 spindles, PBR dual piston calipers, on the rear I am running north race car brackets with 94/95 calipers and rotors.
Gutted stock proportioning valve, and a ford racing proportioning valve for the rear brakes.
I run wilwood brake fluid.
What would cause that? Do you think the leak caused it? Is there something in the MC that would cause it to lock up all 4 wheels when it gets low on fluid?
I'm going to work on it tonight or tomorrow. I'm going to fix the leak, top it off with fluid, and bleed the brakes.
What else should I look at?
Also, I popped the vac line off the booster, no fluid ran out.
Give me some ideas.
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