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
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| Subject: | Fuel pressure question |
--> TeamGrumman-List message posted by: "Steven Jackson" <steven.jackson14@adelphia.net>
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
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| Subject: | Re: 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
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--> 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
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| Subject: | Fuel pressure question |
--> TeamGrumman-List message posted by: "Steven Jackson" <steven.jackson14@adelphia.net>
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
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| Subject: | Re: Tiger Annual |
--> TeamGrumman-List message posted by: "RICK POLLACK" <rdp123@verizon.net>
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
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