FUEL PUMPS

There are several fuel pumps used in the junior dragster arena, all of which are pulse type pumps. The rules dictate that the pump must be pulsed from the intake manifold.

Because of the characteristics of these pumps, several things should be observed to insure proper and trouble free operation.

A... the pump should always be mounted above the signal port on the manifold.   This insures that any fuel that could collect in the signal hose remains in the lower cross section area of the hose (with clear area above) and that once the engine is turned off that any excess runs back down the tube.

B...the pump should be mounted close to the signal port so as to keep the hose length as short as possible. (shorter hose = better signal)

One common mistake is  to mount the pump down on the crank support plate or on the chassis firewall. This method is not acceptable because fuel can collect in the in the hose (and membrane area of the pump). This can result in a short pump life, weak signal and poor pump operation. The longer hose also produces a weaker signal.

If the car is to be in storage, the entire fuel system should be flushed. See the "White Death" section of the site.