Mailing List flyrotary@lancaironline.net Message #33709
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost??
Date: Thu, 21 Sep 2006 14:42:35 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks, Joe.  That supports my "belief" that there are two different types of "manifold referenced" fuel pressure regulators.  One type that simply increases fuel pressure when boost pressure is detected to compensate for the increased air flow and the other type also adjusts the fuel pressure for any change in manifold pressure (vacuum or boost).
 
I presume your pressure gauge remains steady as you adjust throttle ?
 
Ed
----- Original Message -----
From: Joe Hull
Sent: Thursday, September 21, 2006 2:24 PM
Subject: [FlyRotary] Re: Fuel Pressure Regulator Vacuum or Boost??

So my question to those who realllllllyyyyyy know -  is it correct that for my NA 13B I need a fuel pressure regulator that responses to manifold "Vacuum" or is the difference in description between "vacuum referenced and boost referenced " just semantics in advertising?

 

As always – I’m not one who reallllly knows and can’t answer the question. But, I can add that Dave Atkins told me to just cap the pressure port on my fuel regulator. One of his guys suggested I connect it to the vacuum line and he said “no, it doesn’t do anything on an NA setup”. I’m using the TWM fuel-pressure regulator. So I guess that follows with your experience of “not doing anything”

 

Joe Hull

Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)

Redmond (Seattle), Washington

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