---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Mon 10/25/04: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:45 PM - Fuel pressure question (Steven Jackson) 2. 10:10 PM - Re: Fuel pressure question (TeamGrumman@AOL.COM) 3. 10:32 PM - Tiger Annual (TeamGrumman@AOL.COM) 4. 10:35 PM - Re: Fuel pressure question (Steven Jackson) 5. 10:56 PM - Re: Tiger Annual (RICK POLLACK) ________________________________ Message 1 _____________________________________ Time: 07:45:09 PM PST US From: "Steven Jackson" Subject: TeamGrumman-List: Fuel pressure question --> TeamGrumman-List message posted by: "Steven Jackson" TG, Before my project started, my fuel pressure gauge usually read around 4-6 psi with or without the elec pump on. Now, after I've put some hours on the plane, I've noticed that my fuel pressure is typically reading much higher--around 6-10 psi. With the elec pump on a high around 10 vs. 6 before, and with the elec pump off, a low of 6 vs. 4 before. There's a new mechanical pump, all new plumbing in the fuel system firewall forward, but I kept my old electric pump. One thing I have noticed is that before starting, when I turn on the elec fuel pump, the clicking sound is much more rapid than it used to be--like the pump before may have been laboring? I haven't noticed anything abnormal with the fuel flow--consumption is about the same--maybe a bit higher, but I assume that's probably more a function of the low compression vs. high compression pistons. Anyway, certainly not a show-stopper by any means, but I was just curious as to whether or not this was a symptom of better overall fuel system health, or whether or not something detrimental is causing the higher pressure. Fuel pressure gauge perhaps? Thanks, Steven Jackson '75 AA-1B (O-320A2B Collier STC) Ser# 0534 N1434R L22 Yucca Valley, CA ________________________________ Message 2 _____________________________________ Time: 10:10:41 PM PST US From: TeamGrumman@AOL.COM Subject: Re: TeamGrumman-List: Fuel pressure question --> TeamGrumman-List message posted by: TeamGrumman@aol.com In a message dated 10/25/04 7:46:48 PM, steven.jackson14@adelphia.net writes: > Now, after I've put some hours on the > plane, I've noticed that my fuel pressure is typically reading much > higher--around 6-10 psi.=A0 With the elec pump on a high around 10 vs. 6 > before, and with the elec pump off, a low of 6 vs. 4 before.=A0 > It actually looks like your fuel pressure is behaving as it should. 10 might be a touch high, but it could also be that your guage needle is bent off of zero. Gary ________________________________ Message 3 _____________________________________ Time: 10:32:09 PM PST US From: TeamGrumman@AOL.COM Subject: TeamGrumman-List: Tiger Annual --> TeamGrumman-List message posted by: TeamGrumman@aol.com I'm doing and annual on a 77 Tiger. When I pulled the spinner, the forward spinner bulkhead nearly fell off in two pieces. When I went to pull the prop, 3 of the bolts, one in particular, had fretted aluminum on them from the prop/spacer. The one most fretted, has damaged the prop in the bolt hole bore. The rear backing plate had been installed wrong too. This is a brand new Sensenich prop with less than 200 hours on it. It was installed last year at annual. The forward spinner bulkhead was installed new. The rear bulkhead was not replaced during the new prop installation. Still, the rear bulkhead has been installed wrong a number of times. It looked like swiss cheese. Baffles were installed 16 months ago when the #3 cyl was replaced with 310 hours since new. Yep, the engine had been overhauled by a local FBO. The same folks installed the baffles. The baffles are in such poor shape that they'll need to be replaced. The brace from the #1 exhaust to the front metal baffle was home made and about 1 inch too long. This forced the metal baffle against the nose bowl, cutting a 10 inch gash into the nose bowl. The grommets through which the mag leads (to the top plugs) were missing and in their placed was about a pound of RTV. The oil filler neck was safetied, but, there was about a 1/2 inch of slack in the wire. Oh, so that's where all the oil came from. And I'm just getting started. Gary ________________________________ Message 4 _____________________________________ Time: 10:35:14 PM PST US From: "Steven Jackson" Subject: RE: TeamGrumman-List: Fuel pressure question --> TeamGrumman-List message posted by: "Steven Jackson" Could be just the angle--maybe it isn't quite hitting 10 psi... Thanks Gary -----Original Message----- From: owner-teamgrumman-list-server@matronics.com [mailto:owner-teamgrumman-list-server@matronics.com]On Behalf Of TeamGrumman@AOL.COM Subject: Re: TeamGrumman-List: Fuel pressure question --> TeamGrumman-List message posted by: TeamGrumman@aol.com In a message dated 10/25/04 7:46:48 PM, steven.jackson14@adelphia.net writes: > Now, after I've put some hours on the > plane, I've noticed that my fuel pressure is typically reading much > higher--around 6-10 psi.=A0 With the elec pump on a high around 10 vs. 6 > before, and with the elec pump off, a low of 6 vs. 4 before.=A0 > It actually looks like your fuel pressure is behaving as it should. 10 might be a touch high, but it could also be that your guage needle is bent off of zero. Gary ________________________________ Message 5 _____________________________________ Time: 10:56:48 PM PST US From: "RICK POLLACK" Subject: Re: TeamGrumman-List: Tiger Annual --> TeamGrumman-List message posted by: "RICK POLLACK" Gary, I was talking with the powerflow guys at the AOPA EXPO. They are interested in getting more Grumman orders of their exhaust so they offered to give you a dealer price. I am not sure what this means but they seemed interested in Grumman mechanics (or engineers, as known in other parts). Rick