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water pump anyone?

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larry(at)macsmachine.com
Guest

Posted: Wed Sep 05, 2007 3:46 pm Post subject: 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

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d3dw(at)sbcglobal.net
Guest

Posted: Wed Sep 05, 2007 4:16 pm Post subject: water pump anyone?

Thanks a bunch, Larry. I'll add this to my records.  don walker

   

  do not archive

LarryMcFarland <larry(at)macsmachine.com> wrote:

  [quote]--> Stratus-List message posted by: LarryMcFarland 



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. [quote][b]

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jpollard(at)ciaccess.com
Guest

Posted: Wed Sep 05, 2007 5:51 pm Post subject: water pump anyone?

This was probably just a fluke but I bought a pump making sure it

had the right impeller and all. A year later when I put it on I

noticed the belts did not line up very well. I measured the old

and new pumps distance between the mounting gasket face and the

center of the pulley and there was a 3/16 of an inch difference.

It was too late to take it back so I had to buy another and it

was fine.  May be good to measure before you cant take it back

since you may be keeping it on your spare parts shelf for a while.





Jim Pollard



 	  Quote: 	
		  



LarryMcFarland <larry(at)macsmachine.com> wrote:




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.

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frank.hinde(at)hp.com
Guest

Posted: Wed Sep 05, 2007 6:25 pm Post subject: water pump anyone?

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.



I mean if you get 2500 hours like you will from a 100HP airplane motor

then yes maybe your right...But do we know this yet?



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.



Sure the airplane motors cost a lot more new but if it lasts 3 times as

long how do the numers stack up then?



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!



--

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gkrysztopik(at)satx.rr.co
Guest

Posted: Wed Sep 05, 2007 6:51 pm Post subject: water pump anyone?

Thanks for the info Larry!



Gary 



2:55 PM

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k4cod(at)bellsouth.net
Guest

Posted: Thu Sep 06, 2007 4:57 am Post 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



--

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larry(at)macsmachine.com
Guest

Posted: Thu Sep 06, 2007 6:46 am Post subject: water pump anyone?

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:

 	  Quote: 	
		   



 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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frank.hinde(at)hp.com
Guest

Posted: Thu Sep 06, 2007 7:33 am Post 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



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