Today's Message Index:
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1. 05:57 AM - Re: water pump anyone? (Jim Weston)
2. 07:46 AM - Re: water pump anyone? (LarryMcFarland)
3. 08:33 AM - Re: water pump anyone? (Hinde, Frank George (Corvallis))
Message 1
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| Subject: | water pump anyone? |
Hi Everyone,
I haven't posted anything here in quite a while, so I thought that I'd add
my two cents of info.
As Larry found, it is apparently a good general rule of thumb to tell the
auto parts stores that you are looking for engine parts for the Subaru Brat
pickup truck. I found that if I told them it was for a 1984 Brat I always
got the correct parts; at least so far. I had the engine apart a few years
ago for a striped out engine thru bolt problem, so decided to replace all of
the bearings and seals while I was in there. By ordering for the 84 Brat,
everything fit. I did have to get slightly undersized bearings since the
rebuild shop had apparently turned down the crank. Hope this helps someone.
Jim Weston
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of LarryMcFarland
Sent: Wednesday, September 05, 2007 7:46 PM
Subject: Stratus-List: water pump anyone?
Hi Guys,
I decided to buy a water pump for the Stratus Subaru EA-81 as these tend
to fail with some warning, but on their own schedule. So it seemed
prudent to have spare parts, belts, plugs, filters, etc. The EA-81 has
been a great performer with exceptional economy. I ordered a water pump
for $26.00 at my local auto parts store. For the car data, it turned out
not to be the correct one. The pulley (which was not included) was to be
fastened with 4 bolts (not included) and the later than 1984 design
pressed steel impeller is reported to self-destruct at high rpm. I
visited *O'Reilly's auto parts web site and found that the part number
for the correct pump is* *57-1042*. This pump has the preferred cast
impeller, the correct mushroom shaped pulley (attached) and it is listed
for $26.99 less $3.00 core-exchange if you happen to need one.
Data used for both was "*Brat 1.8 pickup truck 1982-1987*".
Another source part number for it is 53105, GMB water pump.
Both are built by Cardone Industries.
Stratus only provides Atsugi as "Specification" for the pump which is
interpreted to mean it has "its own" characteristics.
No one flies 100 horsepower pound for pound as inexpensively as the
Subaru EA-81.
Tuck this info into your Stratus manual or reference information and
avoid the 48 hours of bewilderment.
Happy flying guys,
Larry McFarland 601HDS at www.macsmachine.com
--
8:36 AM
Message 2
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| Subject: | Re: water pump anyone? |
Hi Frank,
I dont think theres anything to prevent the EA-81 Subaru from reaching
2500 hours with proper maintenance. Ive witnessed several of $22K certified
engines at our airport going thru overhaul at $7 to $9K, getting new
magnetos
at $1K and requiring other parts that are just breathtakingly expensive.
The Subaru needs about $500 parts to do an overhaul. Im able to
selectively burn
3.5 to 4.5 gal per hour of 87-octane at <$3/gal. Our fields 100LL is
over $4.50 gal.
You only have to do the numbers to see the economy of this engine.
I agree that the $600 heads rework by Ram Performance was necessary for
peace of mind.
The most satisfying part of the Subaru is its very quiet, relative to
my friends RV6 certified
air-cooled engine. The OHV Subaru has a distinctive sound that says smooth.
Recent data shows the 100 hp Subaru has as much or more hp per pound
than 100 hp certified engines.
Step up to a $14K 3300 or a $22K 0360 and its a whole other story, The
$7K paid for the Stratus
engine is matched by a low price for any part on it, and its mostly
locally available. Spark plugs are still $2.25.
What more could one ask of it, perhaps, just be able to go faster?
Everything has an appropriate price.
Then, it becomes your preference.
Im very pleased with the Stratus Subaru and I'd do it again in a heartbeat.
Larry McFarland 601HDS at www.macsmachine.com
Hinde, Frank George (Corvallis) wrote:
>
> Oh don't you just love a naysayer...but here goes..:)
> Your last statement about the economy. I don't think you can really say
> that Larry until you know how long Stratus lasts.
>
> Secondly, if your simply comparing fuel costs then airplane motors (at
> least fuel injected ones) can be run more economically than the Stratus
> simply because you can run the engine lean or peak exhaust as
> temperature.
>
> My 190Hp IO360 will normally run 10GPH but that can be got doen to 7gph
> running on the lean side of peak EGT...this has a significant effect on
> fuel caosts and as almost all airplane motors can be run on auto fuel
> then the comparison could be a lot closer than you might think.
>
> On the whole though, with sorted valve guides, the Stratus setup is a
> sweet little motor.
>
> All the best
>
> Frank
> 601HDS 400 hours
> RV7a IO360 21o hours in one year...YIKES!
>
>
> No one flies 100 horsepower pound for pound as inexpensively as the
> Subaru EA-81.
>
> Happy flying guys,
>
> Larry McFarland 601HDS at www.macsmachine.com
>
>
>
Message 3
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| Subject: | water pump anyone? |
Ok so airplane engines can run the same fuel as you do...I run 92 octane
in my IO360...Works fine. Technology is also improving. As you know a
certified engine in an experimental is no longer certified. As such
there are several options for running aftermarket electronic ignitions.
Magnetos are rapidly going the same way as the vacuum pump..I.e the
trash can.
But your right an overhaul will cost as much as the Stratus did in the
first place.
But, if I want to fly at Zodiac speeds (OK that's not fair as the RV is
a much slippier airframe) I bet I could do it at about 5GPH...which is
what I ran my HDS at...I.e I think fuel costs are very similar...If I
want to go fast I can almost get 30 miles per gallon...I never saw that
in the Zodiac...Oh and I have much larger tanks so very often I would be
refueling the HDS at my destination whereas I can come back home in the
RV to refuel from my gas cans. (note I usually get aroung 26MPG at about
180mph).
Interesting you can run 87oct...My Stratus was not happy on 87, I would
get run on when I turned off the ignition which went away when I swapped
to 92 octane.
I don't dissagree that the Stratus unit is a neat little package (if you
ignore the valve guide debacle...and I'm being kind here and the fact
the ignitions are really not up to the task). Remember too that that
this motor cost me nearly 1.5* what I paid for it to find the solution
to the valve guide issue.
Is Stratus still providing engine packages or is he just selling the
redrive these days?
Longevity?..I don't know...How long will those anodised cogs last? My
only point is we have not seen really high time Stratus's (that I'm
aware of)...have any of them gone over 1000 hours yet?
The other part to this debate is that the airplane engine experimental
market does not really cater to the 100HP range. The RV's being so
popular has spun off a whole 'nother industry around building 180+hp
experimental only motors...I.e new engines that are never certified.
That market has not materialised for the 100hp range so your sorta stuck
with whats out there and I suspect parts are spendy.
As to smoothness..Hmm, if you get the same powered 200HP Eggenfelner
soob package without the silencer (the Stratus has a silencer too) then
the roar is pretty hideous...Maybe it takes a lot of noise to make a lot
of power...The airplane motors are not silenced remember.
I would say my IO360 has a similar vibration level to the Stratus, but
without the rum-rum noise the Stratus had..Not a big deal though.
As you say a lot of personal preference. I spent so much time and money
making the Stratus reliable that I personally would have been better off
sticking a Rotax in it. If I were doing it again I would go to ram
Performance...More money but reliability is everything in an airplane.
I'm really glad to finally see the Stratus as a reliable package and
glad to have been a part of making that happen, it's a shame that
Stratus took no responsibility for the valve guide issue and left it up
to us builders to figure it out (and thankfully Ram Performance came on
the scene). If the Stratus had been a certified motor the FAA would have
grounded all of them!
Heres to longevity!
Frank
-----Original Message-----
From: owner-stratus-list-server@matronics.com
[mailto:owner-stratus-list-server@matronics.com] On Behalf Of
LarryMcFarland
Sent: Thursday, September 06, 2007 7:46 AM
Subject: Re: Stratus-List: water pump anyone?
--> <larry@macsmachine.com>
Hi Frank,
I don't think there's anything to prevent the EA-81 Subaru from reaching
2500 hours with proper maintenance. I've witnessed several of $22K
certified engines" at our airport going thru overhaul at $7 to $9K,
getting new magnetos at $1K and requiring other parts that are just
breathtakingly expensive.
The Subaru needs about $500 parts to do an overhaul. I'm able to
selectively burn
3.5 to 4.5 gal per hour of 87-octane at <$3/gal. Our field's 100LL is
over $4.50 gal.
You only have to do the numbers to see the economy of this engine.
I agree that the $600 heads rework by Ram Performance was necessary for
peace of mind.
The most satisfying part of the Subaru is it's very quiet, relative to
my friends RV6 certified air-cooled engine. The OHV Subaru has a
distinctive sound that says smooth.
Recent data shows the 100 hp Subaru has as much or more hp per pound
than 100 hp certified engines.
Step up to a $14K 3300 or a $22K 0360 and it's a whole other story, The
$7K paid for the Stratus engine is matched by a low price for any part
on it, and it's mostly locally available. Spark plugs are still $2.25.
What more could one ask of it, perhaps, just be able to go faster?
Everything has an appropriate price.
Then, it becomes your preference.
I'm very pleased with the Stratus Subaru and I'd do it again in a
heartbeat.
Larry McFarland 601HDS at www.macsmachine.com
Hinde, Frank George (Corvallis) wrote:
> --> <frank.hinde@hp.com>
>
> Oh don't you just love a naysayer...but here goes..:) Your last
> statement about the economy. I don't think you can really say that
> Larry until you know how long Stratus lasts.
>
> Secondly, if your simply comparing fuel costs then airplane motors (at
> least fuel injected ones) can be run more economically than the
> Stratus simply because you can run the engine lean or peak exhaust as
> temperature.
>
> My 190Hp IO360 will normally run 10GPH but that can be got doen to
> 7gph running on the lean side of peak EGT...this has a significant
> effect on fuel caosts and as almost all airplane motors can be run on
> auto fuel then the comparison could be a lot closer than you might
think.
>
> On the whole though, with sorted valve guides, the Stratus setup is a
> sweet little motor.
>
> All the best
>
> Frank
> 601HDS 400 hours
> RV7a IO360 21o hours in one year...YIKES!
>
>
> No one flies 100 horsepower pound for pound as inexpensively as the
> Subaru EA-81.
>
> Happy flying guys,
>
> Larry McFarland 601HDS at www.macsmachine.com
>
>
>
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