I have heard of people adding a small electric fuel pump to prime their fuel lines for cars that sit for extended periods. I understand the principle, but...
If the car has a mechanical pump, can the electric pump actually push fuel though it? I thought the mechanical pumps only allowed fuel through as they open and close. What if the electric pump is running while the mechanical is off the pump stroke? Please pardon the ignorance, I just do not understand.
Also, in the case of a "drift car", I've seen them fitted with a large brake lever near the floor shifter. These are plumbed to the rear brakes to initiate a skid to get the rear of the car to slide. These are often plumbed using a master cylinder near the large hand operated lever. Does the firewall master cylinder have a check valve to prevent fluid and pressure from pushing out of the reservoirs?