Adjusting problem ?

[osdmike]

Hi !



I recently bought a -69 Camaro with Wilwood disk brakes .(Front and rear)
The front brakes , ( approx. 10,50" diameter) was put on the car , in the early or mid- 90´s , so I´m not sure what model
the calipers are.

In the rear , I have a ford 9" axle , that was put on the car some years later , with 12" diameter disks.
I have 15" American Racing Wheels . It´s tight , but it works.

Since the rear brakes are larger , they also lock up very easily.

I have a propotioning valve , ( I´m not sure about the brand. It says "K-N" on the adjusting knob).

Does any one have any info´s about this propotioning valve ?

When I have the valve adjusted all the way out ,anti- clockwise , the brakes are pretty OK balanced , but not perfect.
I have to push the pedal hard

When I adjust the valve clockwise , I get better brake performance , but I also get problem with lockup in the rear.
The more clockwise adjusting , the more lockup in the rear.

Would this be an adjusting problem , or do I have to put larger rotors in the front?
What do You Guys think ?

Michael