I have to Laugh at myself. I just re-red the Wilwood instructions as it's time for me to adjust my p valve.
When We first installed new calipers ETC, we couldn't get the P valve adjusted...
Then We read the instructions,,, not what I first though when We installed new disc brakes and this P valve.
This part is what got me...
Hope this helps..
The knob rotated all the way out (counter-clockwise) will provide a maximum pressure REDUCTION
Rotating the knob in (clockwise) will incrementally increase line pressure, up to full pressure.
The adjusting knob is marked with an arrow indicating the direction required to decrease line pressure to the calipers.
The knob rotated all the way out (counter-clockwise) will provide a maximum pressure reduction of 57%.