October 15, 2008 - Manifold Pressure tubing

The manifold pressure system isn't complex but I needed to get the right parts before I could finish it.  This required an order from Aircraft Spruce and a visit to the Pep Boys aviation aisle. 

Basically the manifold pressure hose runs from the engine, through the firewall, to two places:  the Dynon MP sensor and the Lightspeed computer.   The problem was that Vans supplies a 3/32" firewall passthrough fitting but the Dynon sensor requires 3/8" inner diameter tube and the Lightspeed requires 1/4" inner diameter tube. 

Below is the 1/4" inner diameter tube hooking up to the Lightspeed computer.
    
The firewall passthrough AN fitting.  The Vans supplied fitting had a little 3/32" tip on the cockpit side.  That wouldn't work. 
     
Thanks to a tip from the forums, I bought this AN807-4D AN fitting which ended in a 3/8" inner diameter tip.  I had also ordered a 3/8" T-fitting to split the hose  -- one side running to the Dynon MP sensor and the other running to the Lightspeed.
 
From Pep Boys, I got a little 3/8" to 1/4" adapter since the Lightspeed needs 1/4". 
     
 The Dynon MP sensor uses Molex connectors for the three wires.  So I finally bit the bullet and bought a Molex connector crimper.  It took me awhile, but I finally found an inexpensive one on the web. 
     
Here you can see the three wires running into the Dynon MP sensor.  So the manifold pressure system is finally done.  It's all about having the right parts for the job.
     
 I finally got around to hooking up the static air tubing to the airspeed indicator.  So the static air system is done as well.
    
 
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