Mailing List flyrotary@lancaironline.net Message #43988
From: John Downing <downing.j@sbcglobal.net>
Subject: Re: [FlyRotary] Re: Manifold vacuum gauge
Date: Mon, 22 Sep 2008 08:12:59 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Mark, I was thinking along the lines of the restrictors in the vacuum lines I seen in the pile of tubing from a couple old cars that I scraped, or maybe a 1/8" piece of steel tubing with a drop of solder in and a hole drilled thru the solder.  The aquarium valve would sure be a simple way to make a restrictor.  JohnD
----- Original Message -----
From: Marc Wiese
Sent: Sunday, September 21, 2008 10:20 PM
Subject: [FlyRotary] Re: Manifold vacuum gauge

Is that the same needle valve that you get with the Wal Mart aquarium pump (which I made my engine dryer out of)?
Marc Wiese
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Rino
Sent: Sunday, September 21, 2008 7:44 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Manifold vacuum gauge

I installed a pulse chamber because the pressure reading on the EM2 was jumping around too much.   The pulse chamber solved that.
 
Rino Lacombe

Today I sorted out the wiring and everything is now working.  The only problem is that the manifold vacuum gauge is reading backwards.  I tried changing the plus-minus wires around on the back of the gauge and it reads nothing, even with vacuum applied.  The question is what happens if I switch the power and ground wires around, does that do anything besides blow the fuse or the gauge.  Will run the engine again tomorrow with the ole steam gauge and try and get a start on the EC2 tuning. 
 
 One other question, does the vacuum lines to the EC2 need some kind of pulse chamber, like a small fuel filter or orifice in each line.  JohnD
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