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janderson412(at)hotmail.c
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 Posted: Sun May 28, 2006 11:50 pm Post subject: Oil pressure |
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Kurt, I have new bearings, new oil pump (EA 82) and not a hole lot higher
than your pressures. Are they so low? Remember on the car it only has a
light that comes on at about 8-10 psi. I've been running mineral multi-grade
to run the engine in but changed to semi-synthetic today so will be
interested to see if there's a change. John
From: kurt schrader <smokey_bear_40220(at)yahoo.com>
Reply-To: kitfox-list(at)matronics.com
To: kitfox-list(at)matronics.com
Subject: RE: Subaru EA81, Dave Johnson redrive conversion,
mount for Model II, III FOR SALE
Date: Sun, 28 May 2006 22:59:35 -0700 (PDT)
<smokey_bear_40220(at)yahoo.com>
Rick,
I am using non-synthetic Castrol 20W50. OK temps on
the last flight of around 190-195, but 40-50 psi.
More around 40. I usually see a good 50. This last
few months the pressure has dropped and been variable,
but no leaks?
I bought some aviation 100 weight (from Sams Club in
FL) to try out. Have you used this?
If it gets hotter than this flight I can not pull to
idle and keep the pressure above 30 psi. That is what
I worry most about, idle pressure for landing. I have
seen it go to 20 on rollout, so I keep the rpm up.
I know there is very little force on the bearings at
idle, but I want to keep that front bearing out of
trouble.
I wish it had roller bearings on the crank.
Kurt S.
--- wingsdown <wingsdown(at)comcast.net> wrote:
| Quote: |
<wingsdown(at)comcast.net>
Kurt,
What pressure are you seeing and at what temp? Are
you using a
semi-synthetic. I had great results with Castrol
20-50 Semi synthetic.
Rick
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Check out the latest video (at) http://xtra.co.nz/streaming
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smokey_bear_40220(at)yaho
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| Posted: Tue May 30, 2006 11:22 am Post subject: Oil pressure |
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John,
Because we drive a prop, you need at least 30 psi to
keep from spinning and destroying the front (plane,
flywheel end) main bearing. One pilot spun the
bearing and froze the engine in flight several years
back, though he ran it to super high oil temps first
and then flew it again with out fixing it.
I installed a 30 psi pressure switch with idiot light
(that also drives my Hobbs) and a pressure gauge that
flashes at 30 psi too. Don't want to mess with low
pressure myself. As soon as I see the flashing gauge
on landing rollout, I up the RPM to keep it off.
Somehow the gauge catches it before the switch/light.
Kurt S.
--- John Anderson <janderson412(at)hotmail.com> wrote:
| Quote: | Kurt, I have new bearings, new oil pump (EA 82) and
not a whole lot higher
than your pressures. Are they so low? Remember on
the car it only has a
light that comes on at about 8-10 psi. I've been
running mineral multi-grade
to run the engine in but changed to semi-synthetic
today so will be
interested to see if there's a change. John
|
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janderson412(at)hotmail.c
Guest
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| Posted: Tue May 30, 2006 12:44 pm Post subject: Oil pressure |
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You run a turbo Kurt? Something that comes to mind is the bolt (drilled) on
the turbo oil feed banjo fitting. I have noticed that with the older turbos
the orifis in the bolt was larger, in the later water cooled models it was
reduced in size thus reducing the oil flow and oil pressure loss. By chance
you don't have an old fitting? Long shot perhaps. John
From: kurt schrader <smokey_bear_40220(at)yahoo.com>
Reply-To: kitfox-list(at)matronics.com
To: kitfox-list(at)matronics.com
Subject: Re: Oil pressure
Date: Tue, 30 May 2006 12:22:24 -0700 (PDT)
<smokey_bear_40220(at)yahoo.com>
John,
Because we drive a prop, you need at least 30 psi to
keep from spinning and destroying the front (plane,
flywheel end) main bearing. One pilot spun the
bearing and froze the engine in flight several years
back, though he ran it to super high oil temps first
and then flew it again with out fixing it.
I installed a 30 psi pressure switch with idiot light
(that also drives my Hobbs) and a pressure gauge that
flashes at 30 psi too. Don't want to mess with low
pressure myself. As soon as I see the flashing gauge
on landing rollout, I up the RPM to keep it off.
Somehow the gauge catches it before the switch/light.
Kurt S.
--- John Anderson <janderson412(at)hotmail.com> wrote:
| Quote: | Kurt, I have new bearings, new oil pump (EA 82) and
not a whole lot higher
than your pressures. Are they so low? Remember on
the car it only has a
light that comes on at about 8-10 psi. I've been
running mineral multi-grade
to run the engine in but changed to semi-synthetic
today so will be
interested to see if there's a change. John
|
__________________________________________________
_________________________________________________________________
Need more speed? Get Xtra Broadband (at)
http://jetstream.xtra.co.nz/chm/0,,202853-1000,00.html
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rflick(at)chilitech.net
Guest
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| Posted: Wed May 31, 2006 2:34 pm Post subject: oil pressure |
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i have a recently overhauled ea-81 sub and am haveing trouble getting =
enough oil press after warm up. starts off around 60 lbs and then =
shortly drops off to 20 and a little less after hot. i have a new =
pump-new gauage and sender and have checked everything i can think of =
but no luck yet. i am useing 20-50 castrol. any ideas would be greatly =
appreciated. i do not have an oil cooler but am putting one on. =
question? do i put the cooler in the return line to my sump or in the =
inlet line to the pump? thanks ralph
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wingsdown(at)comcast.net
Guest
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| Posted: Wed May 31, 2006 5:12 pm Post subject: oil pressure |
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What are the oil temps? If they are normal I would hook up a mechanical
pressure gage you can look at after a short flight.
My engine did not use a sump but the general flow is, engine out----oil
filter----oil cooler----engine in. You can just crank the engine a few
turns to determine which is which with oil in the system. Make sure you
plumb the filter correct in/out, least you burst the filter or worse
starve the engine. If you have been running much at 20 PSI chances are
damage my be done and at least a teardown inspection needed. Since I did
not have a sump maybe someone else knows the routing for it. If you
install a thermostat such as the MOCAL it basically goes before the
cooler to bypass oil or flow when needed. Hope this helps.
Rick
--
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smokey_bear_40220(at)yaho
Guest
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| Posted: Thu Jun 01, 2006 9:33 pm Post subject: oil pressure |
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Hi Bill/ralph?
How hot is hot when the pressure is 20?
20 psi is too low for any power runs, let alone
flight.
Kurt S.
--- Bill Flick <rflick(at)chilitech.net> wrote:
| Quote: | i have a recently overhauled ea-81 sub and am
haveing trouble getting =
enough oil press after warm up. starts off around
60 lbs and then =
shortly drops off to 20 and a little less after hot.
i have a new =
pump-new gauage and sender and have checked
everything i can think of =
but no luck yet. i am useing 20-50 castrol. any
ideas would be greatly =
appreciated. i do not have an oil cooler but am
putting one on. =
question? do i put the cooler in the return line to
my sump or in the =
inlet line to the pump? thanks ralph
|
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