Mailing List flyrotary@lancaironline.net Message #42716
From: Al Gietzen <ALVentures@cox.net>
Subject: Fuel pressure
Date: Mon, 5 May 2008 05:46:40 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

 

That's interesting. When I was first starting to test my rotary I had to back the fuel pressure way down to get it to run relatively well. I'm backed off as far as the Aeromotive regulator will go and indicating about 33psi. Now that things are running better maybe I should try to bump it back up a little. I think Dave Leonard told me he had to go down on pressure as well. What is the consensus opinion?

 

I originally installed a pressure regulator that was not manifold pressure referenced (normal for NA engine). After the first runs I learned that the EC2 was set up assuming MAP referenced pressure. I replaced the regulator and set it for 40 psig with engine off (about the same as WOT).  At idle (MAP of 10-11”) the pressure is about 33-34.  Works fine.

 

Al

 

Still some little tuning issues but it's running well enough to taxi around now. Runs great above 3000 RPM. Maybe a revisit to fuel pressure will help.

 

Need to find a DAR and get this thing inspected/flying!

 

Mike Wills

RV-4 N144MW  

----- Original Message -----

Sent: Sunday, May 04, 2008 5:50 PM

Subject: [FlyRotary] Renesis First Start

 

Saturday with the help of Mark Steitle I was able to start my renesis. Had to run higher rpm's to keep to it running. Wideband O2 showed lean at lower rpm's.  Today after adjusting the fuel pressure to 42 psi (was 30 psi) I was able to idle much lower. My Advanced Flight System EFIS\ engine monitor fuel injector circuit is not putting out a tach signal so no idea on the actual rpm's. Two primer clicks and it starts right up. 

 

Bobby J Hughes

 

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