I have never had any luck holding a car with a line lock in the front brake lines, even after pumping the brakes 10 times before activating the solenoid.. Car would always creep forward.
Mine is not installed reversed & in the rear line after the distribution block and after a wildwood adjustable proportion valve. 4 wheel wildwood disc brakes. I flip a switch and a momentary button on my shifter activates the line lock solenoid. Fluid is locked out of the rear lines before the brake pedal is pressed. After activation pump up the front brakes as hard as you need to in order to hold the car keeping your foot on the pedal. Rear brakes are inactive free wheeling as you do burn out. Let go of brake pedal and button car moves forward & out of the burn out.
