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I have been using an Airflow Performance fuel system (including their boost
pump) for about a year and 100+ Hr. in my 235/io320 conversion.   No
problems whatsoever, I'm totally happy with it.  I get about 25 psi pressure
from the engine driven pump, and about 35 psi from the Airflow pump. Airflow says it is good for continuous duty, but I only use it for priming,
takeoff, and landing.

The pump has a return line from the pressure regulator.  First I tried using
1/8" line and the pump pressure was 60 psi.  Changed to 5/16 return line and
it was OK at about 35 psi.

Bob Belshe
N19BJ

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