George
     George (down under) asked about a leak down regulator by-pass. He is
     concerned about maintaining pressure in the fuel system after
     shutdown. I an not familiar with it so if you can give me an
     application reference, maybe I can comment on it.
     Pressure is maintained  the fuel system after shutdown to allow a
     quick start during the next start up.  If pressure is relieved at
     shutdown, the fuel in the top loading injectors will begin to
     vaporize as the engine temperature increases and could actually
     displace all of the liquid fuel in the injector.  It would take a
     considerable amount of engine cranking to clear the vapor from the
     injectors.
     There are injectors called "bottom loading" where the fuel enters at
     the bottom of the injector instead of the top. Bottom loaders can
     clear the vapor much faster than top loading injectors.

     Joel

Joel,
My information suggests that the fuel pump provides sufficient
pressure in seconds or even instantaneously. My information is that
no one has had any problem with this system to date. No one
has mentioned vapour problems.
George ( down under)



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