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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,249
Pat, the other 'moving part' is not really a moving part - so, within the fuel system you are down to one - the piston. The other bit (hex nut/needle valve/spring/shims) is static. This is the bleed between your fuel pump pressure and system pressure - which supplies fuel to the waist of the piston. By setting the opening on the needle valve (which remains fixed) you vary the pump bleed off - which returns to your tank. So, once set - it stays there - at 90 psi or whatever.
Old 06-15-2008, 07:21 PM
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