Was not thinking just reading & responding ( long tough day ) will watch EM2 as I switch off & note response. I thought about that with having 3/8" fuel lines for feed & 5/16" for return & this is set up as a return sys. back to the same tank the fuel came from. Steve Boise had some good comments also that I will follow up on. David.
From: "Tracy" <rwstracy@gmail.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, June 13, 2012 6:36:24 PM
Subject: [FlyRotary] Re: Fuel presure question.
My Bad, you couldn't see my tongue-in-cheek. I was pretty sure it would stop the engine. The serious part of the question was what happens to the pressure reading on the monitor. If the reading goes down, the problem is probably the regulator and not instrumentation. And even then it may not be a problem. the regulator may being pushed beyond its design maximum flow rate.
Tracy
On Wed, Jun 13, 2012 at 6:27 PM,
<hoursaway1@comcast.net> wrote:
Eng. stops when both are shut off at same time or one after the other, will check again tonight. David
From: "Tracy" <
rwstracy@gmail.com>
To: "Rotary motors in aircraft" <
flyrotary@lancaironline.net>
Sent: Wednesday, June 13, 2012 8:29:41 AM
Subject: [FlyRotary] Re: Fuel presure question.
Hmmmm... Mine goes up about a pound when I switch on the second pump. What happens when you turn both off?
Tracy
Sent from my iPad
Question about fuel pressure indications, at fast idle 2200 RPM, fuel pressure is 42 PSI on EM2, if I switch on the back-up pump with the primary pump the pressure drops to 35 PSI, can here both pumps running, if I switch off either pump pressure goes back to 42 PSI. My system is 13B, stock red injectors all four, pressure regulator is stock Mazda on the end of fuel rail with vacume connection from dynamic chamber. Thanks, David R. Cook RV6A Rotary.