----- Original Message -----
Sent: Sunday, January 23, 2005 8:32
AM
Subject: [FlyRotary] Re: Ah Ha! Pressure
Regulator Problem?
On 1/23/05
8:16 AM, "Ed Anderson" <eanderson@carolina.rr.com>
wrote:
Some excellent
observations, Barry.
Regarding the workings at altitude - there
would certainly be a different fuel flow required at WOT at 4000 vs WOT at
12000 assuming NA engine. A manifold referenced fuel pressure
regulator should maintain a constant pressure differential between the
pressure in the fuel rail and that in the manifold therefore insuring that
the same amount of fuel in injected for the same injector-on time duration
(pulse). So as you increased altitude(and decreased manifold pressure
at WOT) I would expect to see the fuel pressure drop correspondingly to
maintain the differential. Or if turbocharged, I would expect to see
the fuel pressure increase as the boost goes up.
My fuel map
has always been a bit rich at the lower rpm range (idle), so it could be
that when manifold pressure is low (such as at idle) that the pressure
differential is much larger meaning more fuel flows per millisecond of
injector on time than at higher manifold pressure.
A different make
of pressure regulator is likely the only way I will know for
certain.
Ed
A
Hi Ed, here is the one I’m using from Summit Racing
Part#AEI-13109.
Bulent
You read my mind, Bulent. Was just
going to ask you what model you used.
Thanks
Ed A