pressurize any
 hydraulic system, with the pressure regulator installed right at the
 pump?
 That way we would not need a fuel return line?

 I appreciate your comments. Thanks.


 Ramon

 Regulator placed close to engine end of fuel line to compensate for line
pressure loss, in-line filter restriction and in-tank strainer. Maybe 20
feet fuel line to throttle body in my old Suburban. Definitely a PITA to
syphon 25+ gallons of fuel from 42 gallon tank, drop gas tank bash plate,
then drop tank to access pump assy. No wonder the dealer gets around $700.

Al K                          



Not necessarily true.

Many liquid pressure regulators (as opposed to high pressure gas type
regulators) operate by taking line pressure from the pump and bleeding off
all pressure above the set parameter. Your engine oil system operates the
same way. In the rotary, oil is pumped to the coolers, then to the filter
tower where part of it is sent to the rear pressure relief valve and is
dumped back into the sump. The rest, at the proper pressure, because of
this, (determined by the spring in the regulator) goes through the filter
into the galleries.

With FI, whether the regulator is at the pump or at the injector rail seems
to be a matter of choice. mechanical fuel injectors use both.

The renesis (can't speak for the 13B) used a regulator at the rail. I am
using one after the HP pump (located on the cool side of the FW.)


Rich

Are you flying Rich?

Paul Lamar