Mark, When you say the EM2 doesn't like it that high -
isn't that because of a warning limit you have set in it? Or have left it
at a default setting? I agree that if the fuel pressure should
suddenly start showing higher readings it could possibly indicate something like
blockage in fuel return from the pressure regulator or a filter getting plugged
up, etc. So its nice to have a warning on the high end.
But, I find it difficult to believe that Tracy hard coded
in a pressure of 41 psi. But 41 psi at high power setting and 35 at
idle also seem quite in the ball park.
Ed
----- Original Message -----
Sent: Sunday, June 03, 2007 8:02 PM
Subject: [FlyRotary] Re: MAP Referenced
Fuel Pressure Regulator
Ed,
Yes, 41 sounds reasonable, except the EM-2 doesn't like it that
high. It flashes until the engine is started and the fp drops. I
adjusted my static fuel pressure up to 41 psi today. That initial
setting now gives approx. 34psi at idle. FWIW
Thanks,
Mark
On 6/3/07, Ed
Anderson <eanderson@carolina.rr.com>
wrote:
Hi Mark,
Yes, I can tell you, but doubt it will be too
meaningful.
My regulator does have a reference to the
manifold - but, this apparently only causes the pressure regulator to react
to positive (boost) manifold pressure - in otherwords while
under boost pressures the regulator will increase fuel flow to the injectors
by increasing pressure. It apparently does not
regulate the fuel pressure at normal manifold pressure ranges.
But, in any case my pressure regulator keeps the fuel
pressure at 41 psi with one pump on and it increases to 43 with both pumps
on. Again,changing manifold pressure does not affect my fuel
pressure.
I intend to swap it out (someday) for one that is a
true manifold referenced regulator - but, sigh, just always seems to be
something else to do - and it has worked for me for 10 years. But, I
could probably get an even smoother idle if I swapped it out.
I would say 41-43 psi would be a
reasonable setting.
Ed
----- Original Message -----
Sent: Saturday, June 02, 2007 8:25
PM
Subject: [FlyRotary] MAP Referenced
Fuel Pressure Regulator
Ed,
Can you tell me what pressures you're seeing on your fuel pressure at
idle, mid-range, and WOT? Also, please verify that you set the fuel
pressure with engine stopped and fuel pumps ON. What should the
fuel initial fuel pressure be set at for our purposes?
Thanks,
Mark
S.