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Re: [FlyRotary] Re: Fuel Injector Sizing
Hi Buly,
Actually, I have a manifold referenced pressure
regulator (which if I understand the concept) attempts to keep the pressure
differential between the fuel side and manifold side of the injector
constant. However, Varying engine manifold pressure (varying throttle
opening) does not appear to have any affect on my fuel pressure. It sits
rock steady at 40 psi with one pump and goes up to 43 psi with both running
regardless of throttle position. I would expect that as manifold pressure
rises from opening the throttle that the fuel pressure would rise to keep the
pressure differential constant - but, if that is indeed happening, I can not
detect it.
Ed A
----- Original Message -----
Sent: Friday, January 21, 2005 7:57
PM
Subject: [FlyRotary] Re: Fuel Injector
Sizing
On 1/21/05
6:37 PM, "Ed Anderson" <eanderson@carolina.rr.com>
wrote:
George, my fuel
pressure gauge reads between 40 and 43 psi depending on whether I have one
or both pumps on. I fly with 40 psi (one pump). My pump
(with no flow) will give a pressure of 80 psi, but a regulator keeps it at
40-43 psi. I generally check my pumps for their no-flow pressure and
have noticed over the 6 years that the pressure of the main pump has
decreased from 80 psi to 60 psi - so getting near replacement time.
The spare pump still produces 80 psi - less wear as it is normally
only on for take off and landing.
Ed
A
Hi Ed, do you set your fuel pressure without the engine
running or with? The MAP varies the FP while running, so I Assume 37 psi
without engine running would be the benchmark?
Buly
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