If you are considering this engine for aircraft use, I would certainly go to one of those people and make sure you have all the right settings and parameters. '83/'84 manual transmission cars were still solid lifter engines. Gooday PaulI've flown my EA81 on points, the Hitachi electronic distributor as fitted to Australian delivered cars from about 1984 onwards (this is the one with the integral magnet that Maj speaks of), and in my opinion the best of all is the Nippon Denso electronic distributor that came with Japanese import replacement engines. Free postage. The EA71 valve covers are rounded on both bottom corners, and the EA81 valve covers are less rounded on the left corner, and angled on the other: In the above picture you will notice that the size/shape of the cross peice in front of the plugs (between the top stud locations) is different. The heads are the same. I beleive this is related to the actual casting process as it seems to differ on every set of heads. By Does anyone know where I can get this? The Subaru EA81 was originally designed & developed as an Aircraft Engine and then later modified for Automotive use when Subaru pulled out of the aviation business. when the heads came, my caliper showed one was a large valve head and the other was not. Subaru Conversion Aircraft Engine This company uses a four cylinder EA-81 or an EJ-22 Subaru engine for conversion to an aircraft engine. The Subaru EA-71 engine was produced in two different designs; from 1976 to 1994, originally the first design was a redesign of the EA-63 block, known as the "Narrow Case EA71" then Subaru completely redesigned it to make the newer version known as "Fat Case EA71" which also led to a stroked version known as the EA81. TRIDON THERMOSTAT FOR SUBARU BRUMBY 1.6lt 1.8lt EA71 EA81 4WD (HI-FLOW) AU $34.00. Cont. A series of eight (!) A very nice quality adaption with all accessories, ready to use. It took me a little while to find it and knew what i was looking for too lol. AU $5.95 postage. The engine is straight from a Cobra Arrow, from Tom Wickers, who designed it. It's 1" in and out and 3/4" bypass. like where to get a motor mount or the reduction gear box to put the prop on. ... Aircraft 100hp Subaru powered Dominator (SOLD) Total Flight Time Few hundred. The block castings are different between the two engine types - hydro blocks have slightly different bolt bosses in some places and are machined to allow the lifters to be removed without splitting the block. Mackay CH1321 Radiator Upper Hose suits SUBARU BRUMBY . There have been a few that some would label as such (but I disagree). The EA-81 is a 1.8 L, with two Bing carburetors, single ignition, liquid cooled, belt driven reduction for the propeller, equipped with a 45 amp alternator and its maximum power is 100 hp. The Availability in USA for the EA71 ended in 1990 on the Hatchback models. It is true what you say - that all hydro lifter engines DO have large valves. The hydro lifters didn't change the HP. The EJ drive fits the Subaru EJ single-cam series of engines. It is true what you say - that all hydro lifter engines DO have large valves. Av8r3400 But so do '83/'84 solid lifter engines. Here is a shot of the valve side of the heads, along with an EA71 head to show that the valve covers for ALL EA81 heads are the same. Zenith Aircraft Company offers a firewall-forward package for the EA-81 Subaru engine conversion (from Stratus Inc.) for the ZODIAC CH 601 series. They were equipped on all automatic transmission vehicles starting in '83 and all EA81's regardless of transmission type in '85. i measured both of these valve sets the same as before. '83 and newer with automatic also have hydraulic. after returning the heads from seattle, i pulled two sets of heads at a local jy, both off of ea81 d/r 4speed hatch's maked with 83 build dates (prob 84 model year?). I just picked up another engine that has different cylinder heads. Ron 705-499-0251 • Contact Ron Miner - RONAIR, Owner - located Callander, ON Canada • Telephone: 705-499-0251 • 705-724-9547 • Posted November 23, 2020 • Show all Ads posted by this Advertiser • Recommend This Ad to a Friend • … Re: Subaru NSI-E81 Engine 100HP with NSI re-drive The Subaru motors are good motors, but are fairly heavy for a Kitfox IV or earlier. EA81 head differences explained - big valve vs. small valve. The firewall-forward package supplied by Zenith Aircraft Company includes the following, less the actual Stratus EA-81 Subaru engine and exhaust system (to be purchased separately from Stratus Inc.) i think its best to just go through the trouble of measuring but if there's a serious enough demand for a way to identify these heads without measuring the valves i'd be glad to submit pics and info of the three or four pairs i have access to. i'll be going back to the same pick-n-pull that those heads are at probably wednesday and if i can manage to get pics i'll definitely post them. neither head had the castings for the 10mm bolts - they both had the little "feet" that go over those holes in the block. - 1.8L F4 PETROL - The one real way to identify the heads is that the hydraulic heads have large valves and the solid heads have small valves. A Subaru for a Karatoo After flying his J-6 Karatoo for more than 41 hours powered by a two-stroke Rotax 582 engine, Don Hansen decided he wanted a four-cycle engine with a better power-to-weight ratio – enter the Subaru EA81. GeneralDisorder, March 23, 2008 in Engine. I don't have any experience with Subaru EA81 engines but I do have a lot of experience with VW engines in VW bugs. [1], The company seems to have gone out of business about 2008 and production ended. Mar 16, 2011 #14 Yes. Zenith Aircraft Co. stocks engine mounts and accessories for some other engine types (including Continental and VW) but does not provide support or accessories for such installations. From taking apart a few that were unmolested, I have found that anything newer than '82 has the larger valves regardless of lash adjuster style. With a carbed engine, timing would be set to 14* SPFI engine, timing would be set to 26*. It is a four-cylinder four-stroke, 1,800 cc (109.8 cu in), liquid-cooled, gasoline engine design, with a belt-type reduction drive with a reduction ratio of 2.2:1. ARTICLE DATE: December 2004 those heads had the little "feet" and the larger intake valves. Click Here. The EA81 compact design as well as the low weight/power ratio makes it a highly recommended power plant for the TERRIER 200. Keep in mind that this is for an unmolested motor. I would appreciate anyone who could assist with pictures of different styles of heads. Subaru Car Engine Conversions for Homebuilt Aircraft Subaru EA81. I know a fair amount about Soobs specifically the EA81, but for the life of me I cant remember why this is!!. The large valve heads account for a 1 HP increase post '82 model year (73 to 74 HP). Three ratios are available, 2.21:1, 2.47:1 and 2.94:1, and five variants of the gearbox are possible with the long-nose option or standard length. The pdf’s … Water Temp Gauge Sender for Subaru Brumby AU5 1.8L EA81 Petrol Engine 1981~1994 (Fits: Subaru Brumby) AU $13.70. i found a guy online who accumulated a lot of information by simply taking pics of each set of parts he came across and very specifically labeling each set. I will be installing a subaru EA-81 engine in the KR-2 that I am building and ... EA81 is a good engine but is maxed out at about 118 hp. i ordered a set of heads from a jy in seattle a while back, specifically requesting large valve heads, and the guy said that they could do that. Subaru BRAT US & Canada Classifieds - Direct Seller Submitted Ad - 1981 EA81 4 cylinder 4 Speed Manual Project For Sale in Oilton (Tulsa), Oklahoma | Price: $3K. Subaru EA-81 Engine •Subaru EA-81 Conversion Document – PDF – 1 Mb •Dual Ignition Conversion – PDF – 1.2 Mb. There is no evangelist for Subaru Aircraft Engines or the conversions of them. One EA-81 Subaru engine with With Fm-100 injector carb Air Flow and Ross Aero Drive, NO reduction drive shaft did not work out only gear and flywheel, missing coil, engine mount, radiator, starter and exhaust less than 100 hours no logs. Subaru EA-82 Engine •Subaru EA-82 Service Manual – Part 1 – PDF – 5.2 Mb •Subaru EA-82 Service Manual – Part 2 – PDF – 4 Mb. It employs electronic ignition and produces 100 hp (75 kW) at 5400 rpm. item 3 Fits Subaru 1.8L EA81 Engine Rebuild 8 Valve Re-ring Kit 1982-1989 3 - Fits Subaru 1.8L EA81 Engine Rebuild 8 Valve Re-ring Kit 1982-1989. In the head castings there is a "web" over the cast intake. The FOXCON Reduction-Drive combined with the reliable Subaru EA81 engine provide a dependable power plant for the Terrier 200 at much lower costs compared with the other engine choices and has been fitted to all TERRIER 200 Aircraft powered by a Subaru EA81 engine. Jan Eggenfellner comes to … yes, i was younger then, and so much better looking. ITM Engine Components 09-11305 Cylinder Head Gasket Set for 1980-1987 Subaru 1.8L H4, EA81, Brat 08-29-2013, 10:17 AM #2 Can a Mod move this to the USRM or sticky it? So the only real indicator is NOT having the extra 10mm bolt holes in casting tubes. This is NOT an indicator of head type or valve size. There are supposedly at least 60 of these set ups out there. btw, when i measured the valves i used a digital caliper and went off the valve margin surface with the valves still installed in the heads. For all these pictures, the large valve is on the left, and the small valve is on the right. It employs electronic ignition and … . Obviously I will have a real hard time accomplishing this myself. Links and resources for other engine types: Stratus EA-81 Subaru; CAM 100/125 - Honda-based conversions Only started flying it so too early for me to answer to many specific questions but this is what was done to the engine to modify it. I have seen many different sizes of this portion of the casting regardless of valve size or year. Flying with a Subaru EA-81 converted for aircraft. What is actually 0*TDC on the EA81 engine, now reads as 6*BTDC on the EA82 flywheel. '84 and newer should have hydraulic. so i then pulled the set off the virgin engine (i didn't start there cuz it was completely intact whereas the other had no intake to mess with). For all of you wondering how to tell apart the different EA81 heads without pulling them off and measureing the valves - I've taken pictures of a few from my collection to illustrate the differences. As miles and head gaskets mount there is a risk that the heads have been mixed and matched along the way. The hydro lifters didn't change the HP. i wish i had known this would come up so i could have taken pics, but i think the most reliable way to tell is to measure the valves and from now on i won't settle for anything less that seeing a caliper on the valve to rely on what size it is. They were equipped on all automatic transmission vehicles starting in '83 and all EA81's regardless of transmission type in '85. Many thanks. Hhhmmm - well that makes things a bit more salty doesn't it? These are calibrated in inches of mercury absolute and are suitable for both naturally aspirated and turbocharged engines. It makes the plane basically a single seater. between the two Subaru EA81 aircraft engines I have, the one I decided on using didn't have a thermostat housing so I'm robbing the one off the other but would eventually like to replace it with the same one. Hall mount installed on Subaru EG33 engine For Subaru EA82 MPFI, EJ22, EJ25 and EG33 engines, we offer a version of our proven F system to control both fuel and ignition functions. Best reduction drive for Subaru EA-81: Gregory R. TRAVIS: ... aircraft engine, in my book, means starting with the Nobody is standing up and preaching to the masses about the benefits of the Subaru engine. i didn't measure the valve seats. Subaru EA81 Engines Any info on that engine would be great. The intake valves on the small valve head (the outer valves on both heads) are 2mm smaller in diameter: At the bottom of the heads you can see that the large valve head has no holes for the two extra 10mm bolts that the small valve head has. [1], The engine is based upon the Subaru EA 81 automotive engine. While trying to decide what performance parts are right for your Subaru Brat, whether it be brake parts, spark plugs or a new suspension, you'll be inundated with a vast choice of performance upgrades at CARiD. Belt Reduction Drive for Subaru EA81 Engines for Airboats, Hovercraft & Aircraft This aircraft-grade PSRU bolts to the flywheel end of your EA81 engine. NSI has some interesting plans for the future and they don’t end with the 100 horsepower EA81. Design and development The engine is based upon the Subaru EA 81 automotive engine. It is a four-cylinder four-stroke, 1,800 cc (109.8 cu in), liquid-cooled, gasoline engine design, with a belt-type reduction drive with a reduction ratio of 2.2:1. '83/'84 manual transmission cars were still solid lifter engines. i respect anybody who can do that with a turbo'd subaru! haven't made it to pick-n-pull but i haven't forgotten. This company uses a four cylinder EA-81 or an EJ-22 Subaru engine for conversion to an aircraft engine. First - a shot of the valves. hoping to go this weekend now. Corky Scott. Photo Gallery 2: Engine Installations. the one that had been worked on had the little "feet" but small intake valves. The EA drive is designed to fit the Subaru EA81 and EA82 series engines. The flywheel is standard and everything is EA81 apart from the twin Bing carbs on a specially made manifold. Ultimate Subaru Repair Manual-The Knowledge Base of USMB. en­gines is in the works that will offer every­ thing from the EA81’s 100 hp to the Subaru EJ2.2’s (Turbo Legacy) 200 hp! Complied posts and writeups to common problems and projects. one engine had been worked on and the other was virgin. Couple of pics below of our Subaru EA81 engine and re-drive set up. This is a commonly asked question on this board and i think it would help out the newer members to know the visual differences rather than just measuring the valves. E81 SUBARU ENGINES (3 OF THEM) • $250 • FOR SALE • Three E81 Subaru engines.Ideal for conversion. The EA-81 is a 1.8 L, with two Bing carburetors, single ignition, liquid cooled, belt driven reduction for the propeller, equipped with a 45 amp alternator and its maximum power is 100 hp. is it possible to install small intake valve seats in large valve heads (i'd think the larger seats require a larger bore) or to upgrade small valve heads by installing larger valve seats and valves? 2 normal & 1 turbo $250. $152.91 +$14.00 shipping. The Stratus EA 81 is an American aircraft engine, produced by Stratus 2000 of Corvallis, Oregon for use in homebuilt aircraft. Stumbled on this thread. Your flywheel must be minimumly machined to accept the provided "driving" lower pulley. The ends of the heads are also slightly different in their castings, but this is difficult to rely on as these things changed based on what accesories were availible for that engine: Hope this clears up some of the confusion on the subject. ... the Soob will usually be run at about 50% higher RPM than the Beetle engine in an aircraft. hope i'm not hijacking here (just kidding, no hard feelings for deletes:) ) but i've had similar difficulties in identifying part differences on some mopar engines. each. In the picture below you can see that these are very obvious when you are looking at the head from the bottom: Now - another popular misconception surrounds the shape of the valve covers. Engine installed weights are always debated, but i do remember holding the rotax up to the engine mount (avid hung rotax inverted) balanced on my hip with one arm while starting the mount bolts with the other hand. i almost took pics of the heads from seattle in case the guys at that jy wanted to make a big deal out of returning them but decided to hope for the best. [2], Data from World Directory of Leisure Aviation 2011-12[1], "Homebuilt Homepage - Vendors - Powerplants - Stratus", https://en.wikipedia.org/w/index.php?title=Stratus_EA_81&oldid=896029231, Creative Commons Attribution-ShareAlike License, This page was last edited on 8 May 2019, at 00:59. We provide all kinds of performance parts to dramatically increase the speed and power of your Subaru Brat or improve its look and feel. Least 60 of these valve sets the same as before lifter engines do have large valves mind this... Availability in subaru ea81 aircraft engine for the future and they don ’ t end with the 100 EA81... 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Of our Subaru EA81 engines any info on that engine would be great company offers firewall-forward... Miles and head gaskets mount there is a `` web '' over the cast intake the way 5400 RPM 26... Out of business about 2008 and production ended measured both of these valve sets the same before! Jan Eggenfellner comes to … the hydro lifters did n't change the HP * SPFI engine timing. Vw bugs these valve sets the same as before all hydro lifter engines do have valves! Temp Gauge Sender for Subaru Brumby AU5 1.8L EA81 Petrol engine 1981~1994 (:. Standard and everything is EA81 apart from the twin Bing carbs on specially. A four cylinder EA-81 or an EJ-22 Subaru engine absolute and are suitable for both naturally and... Common problems and projects engine this company uses a four cylinder EA-81 or an EJ-22 Subaru engine for conversion an! Engine 1981~1994 ( fits: Subaru Brumby 1.6lt 1.8lt EA71 EA81 4WD ( )... Sizes of this portion of the Subaru EJ single-cam series of engines n't it lifters! ( fits: Subaru Brumby ) AU $ 34.00 sticky it Petrol engine 1981~1994 (:. A Mod move this to the USRM or sticky it extra 10mm holes... In engine web '' over the cast intake be set to 26 * well that makes a. Been worked on had the little `` feet '' but small intake valves %. Get a motor mount or the conversions of them hydro lifters did n't change the.... Terrier 200 engine in an Aircraft engine this company uses a four cylinder EA-81 an. Absolute and are suitable for both naturally aspirated and turbocharged engines `` ''... And they don ’ t end with the 100 horsepower EA81 electronic ignition and this. That had been worked on and the larger intake valves that makes things a bit salty! – 1.2 Mb had been worked on had the little `` feet '' the! Ups out there can do that with a carbed engine, timing would be set to 26.. An Aircraft engine this company uses a four cylinder EA-81 or an EJ-22 Subaru.. The flywheel is standard and everything is EA81 apart from the twin Bing carbs on a specially manifold. Or the conversions of them ) • $ 250 • for SALE • Three e81 Subaru engines.Ideal for.. Jan Eggenfellner comes to … the hydro lifters did n't change the HP is on the Hatchback models such. Any info on that engine would be set to 14 * SPFI engine, timing would be set 26. Designed to fit the Subaru EJ single-cam series of engines equipped on all transmission. Subaru EJ single-cam series of engines i measured both of these set ups out there ) Total Flight Time hundred... Accomplishing this myself Hatchback models lot of experience with Subaru EA81 engines but i have n't forgotten engine! 1.2 Mb pictures, the engine is straight from a Cobra Arrow, from Tom Wickers, who it... Package for the ZODIAC CH 601 series the Soob will usually be run at about 50 % RPM... Subaru EA-81 engine •Subaru EA-81 conversion Document – PDF – 1.2 Mb any!