FUEL PUMP AND LINES

The kit includes an inline electric fuel pump.  The plastic filter goes before the pump, and the metal one comes after the pump.  Holley recommends using better quality gas after installing their fuel injection. 

  The frame rail makes a good place to mount the electric fuel pump.  It needs to be mounted below the lowest point of the fuel tank.  Simple rubber spacers keep it quiet.

  (view: above rear axle) The stock fuel lines need to be altered.  A return line of at least 5/16 diameter is required. The return line on my mechanical fuel pump was only 1/4inch, but my vapor lines from the charcoal canister are 5/16 inch.   The vapor line goes through a vapor separator called a standpipe.  Three vapor lines from the tank connect to the standpipe.

  Holley doesn’t recommend using vapor lines for the fuel return line because they were not intended to carry fuel and many have a restriction at the tank.  I tested for a restriction with a tube and was able to push it into the tank.  After careful inspection I decided to use the vapor return line as my fuel return line.

A little work with the tube bender and the vapor line becomes a fuel return line.  The gas tank needs to be vented or pressure will build up in the tank and cause fuel leaks.  I left the vapor end of the standpipe open so that pressure can escape from the tank.  It may be a good idea to install a small filter on the end of it to keep any grit from getting in the tank.