Bouchard — Is that a regular Subaru ignition system? C $76.11. 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. I should be in fine shape with this gearbox. The secret to getting the EA-81 working good in aircraft is in the modified cam. SUBARU EA EJ GEARBOX CONV. Most TERRIER 200 Aircraft are powered by the Subaru EA 81 engine. makes it a highly recommended power plant for the TERRIER 200. hour and offers exceptional reliability. While cruise RPM might be around 4,000 – take-off will be up at the 5,000 rpm range. Automotive engine designs use new methods to increase reliability. More The cylinder heads as well as the pistons are water cooled providing uniform In my installation, the radiators were higher than the top of the heads. Most TERRIER 200 Aircraft are powered by the Subaru EA 81 engine. Remember, as with Wikipedia, it only takes a few dollars from every person who visits to cover our running costs. The Subaru EA81 was originally designed & developed as KIT • $2,095 • LIMITED TIME ONLY • SPG-4 gearbox conversion kit for aircraft, airboats, hovercraft etc. I acquired a Avid Flyer MD C H HLR with a Subaru Turbo EA81 eng. Bouchard — What did you do to keep the center of gravity (CG) in line? I’ve had my hands Already they have an engine ready to go for aircraft like the Kitfox and Avid Flyer while the KIS, Murphy Rebel, a number of gyroplanes, and many other 100-hp aircraft seem ripe for this engine. EA81 PERFORMANCE. Bouchard — What kind of lifters are you using? I went to buy a Corvair engine from a guy in Ontario and he ended up having 2 more engines so I bought all 3. very effective. Some people prefer Nippondenso distributors. The following Q&A exchange explains Hansen’s work on his engine. With this arrangement, any trapped water and air will move upward to the level of the burp tank and get rid of any air in the system. Subaru EA81. That makes Displacement. Posted August 17, 2009. Buy It … The Mind of an Engineer - The Heart of a Pilot, ... extract from Overview of home built 1993 Kitfox 4 with NSI/Subaru EA81 aircraft engine 512 trouble-free hours on pump gas or 100LL. I've owned three different aircraft … The exhaust ports have been opened up from 1-3/8 inch to 1-3/4 inch, and I made some stainless exhaust pipes from a swimming pool ladder, all of which will let the engine breathe better. SKYWHEELS™ Rotor Blade Manufacturing To Resume, Converting The Subaru EA81 Engine For Aircraft. Bouchard — What reduction unit are you using? Hansen — I cut out a section of the Subaru EA81 engine housing on the backside and welded in a piece of 5/8-inch 6061-T6 aluminum to reduce weight. One problem is the weight and balance. All that said, I just picked up a running Subaru EA81 flight engine with a "reductions" (by Dave Johnson) belt redrive and 72" 3 blade Powerfin prop for an absolute song. Bouchard — Your bell housing is well constructed. In a standard configuration The practical max for non-forced induction seems to be around 120HP. The aviation community builds these engines in a range from stock to over 140HP. The first Subaru Engine used in the US is the E series. Also you may find someone desperately needing one and willing to pay a bit more, or, that people recognize these are older engines and have moved on to something else thus not willing to pay much. The Subaru EA81 has one of the lowest Fuel consumption in its class at just 13ltr per Don Bouchard talks with Don Hansen about how he converted an EA81 for his Karatoo. I know aircraft engines aren’t the cheapest nor the highest-tech but they do work though and quiet well. a online. them to implement fuel injection. The EA81 compact design as well as the low weight/power ratio It uses thirty weight non-detergent oil and man the exploded few in the manual shows about a million parts (give or take). Recommended Posts. Hi Ken, I have seen these go from everywhere between $50 and $1200! The Subaru engine was designed to be an airplane engine and the EA81 is only less than the EA82' Why reduction? After putting the question on the forum, I found a comment elsewhere that with a point operated electronic ignition they last for a long time as the current through the points is only a 'wetting' current and doesn't erode the metal. I live in Regina SK Canada and I drove a long ways to get my Corvair. in all of this. The Availability in USA for the EA71 ended in 1990 on the Hatchback models. Fuji Heavy Industries, Subaru's parent, did make aircraft engines, but the Subaru boxers are not descendants. : reiner stratus inc. Hansen — No, the bowl will not be empty. I thought the EA-81 would be the best combination of lightweight and dependability for the horsepower rating. Maintenance is the second biggest reason customer choose the Subaru, as parts But I would like to increase his power. Look how long it took Hi Carl, yes – there are a variety of conversions being done, each with their own individual set-up. As a machine tool instructor at Eastern Maine Community College in Bangor, Maine, he was comfortable with undertaking an auto engine conversion. Amazingly this fault rarely causes a critical failure, none the less – I wouldn’t be flying it. that Subaru, in one year, makes more engines than Lycoming has their entire history. with it. I guess I’d recommend that anyone converting an EA-81 take a cleanup on the heads to make sure they’re flat, but not take the amount off the heads that I did. Bouchard — Have you had problems with that before? I had the cam ground to give me peak torque at about 4,200 rpm. Share Followers 0. Not sure if I am posting this twice - just lost my sat momentarily and killed the previous post. Although I know smaller units have been used, this set up seems to be a perfect match. I adjusted the vales and timing to subaru specs and added a vacuum advace hose from the distributor to the intake manifold but my performance is worse than before. the ea81 can do a little over 100hp but not 185hp. In addition, all of the rotating parts have been balanced, including the flywheel, crank, connecting rod and connecting rod ends, and the pistons with the rings and sure clips in place. They are This website is 100% self funded, and has been since it began 2006 (from the people who also bring you Redback Aviation Homebuilt Helicopters. Hansen — I installed a heavier battery aft in the fuselage. for millions of dollars available for product development that Lycoming can just dream of. Subaru EA81 Cylinder Head Subaru EA81 Cylinder Head for High Performances. Couple of pics below of our Subaru EA81 engine and re-drive set up. Something that made EA81 engines reliable - was minimal smarts - just a module in the dizzy. In a standard configuration this engine develops 100 HP, which allows the TERRIER 200 to cruise comfortably at 110 Kts. I’m told He considered a Volkswagen conversion, but felt the 80 hp for 70 pounds of weight wasn’t a good enough tradeoff. for millions of dollars available for product development that Lycoming can just dream of. normally see. .... and did not realise how many Aircrafts are actually flying with the So they stagnate. The all up weight of the auto conversion was very close to the same weight of a 145 hp, 6 cylinder, Continental O-300 engine. normally see. I have new rod bearings. or Best Offer. importantly, auto engines are routinely improved, modified. Computer modeling is accurately done to increase quality margin. A81T start to use ECU and knoclk modules that need sensors in good working order, lots of good readings, good earths and power supplies and yeah people tend … carburetor and a modified camshaft combined, guarantee excellent performance. Hansen — It’s a Subaru Hitachi distributor. We have supplied ... Daniel MacPherson's EA81 powered Windfire helicopter, Idaho, USA. Hansen — Yes, on the Rotax 582 there was a bleed valve in the top of the head. After 1000 flight hours, my crankshaft bit the dust and possibly the case. EA81. Your flywheel must be minimumly machined to accept the provided "driving" lower pulley. One absurd option would be a custom adapter plate so that I essentially use a carb from another Subaru or completely different engine/vehicle, so that I If Lycoming makes any improvement, Hansen — It’s a Holly 2300, 350 cfm flow. pulled out of the aviation business. Is there anyone supporting the ea-81 for plane use? The intake manifold is a custom intake for the Holly 2300 carburetor. cooling even in high outside air temperature conditions as well as during its possible to do but if the money isnt a problem swapping to an EJ series motor would jack the horsepower up more than the EA81 would. them to implement fuel injection. a online article 'Why I chose Subaru':Automotive engine designs use new methods to increase reliability. I. I do not know a lot about either the EA-81 or EA-82, both of my are engines are complete. It's heavy, but could be reliable if the external systems are done right. The heads have been planed to .051. Subaru ER engine; Overview; Manufacturer: Subaru: Production: 1988–1991: Layout; Configuration: flat-6 petrol engine: Displacement: 2.7 L (2672 cc) Cylinder bore: 92 mm: Piston stroke: 67 mm: Block material: aluminium: Head material: aluminium: Valvetrain: SOHC: Combustion; Fuel type: Petrol/gasoline: Output; Power output: 112 kW (150 hp) Chronology; Successor: Subaru EG engine Some people call that a burp tank. At a 2.03:1 reduction, if I turn my engine at 5,000 rpm I’ll get 2,500 rpm on the propeller, which is well within the tip speeds for the 72-inch prop I’m using. Engine Type. importantly, auto engines are routinely improved, modified. In either case here it is again. Subaru EA81 delivers its high rated 5400 RPM power output a Propeller, in comparison can only spin 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. From United States. Look how long it took I have a Subaru EA81 engine on my aircraft. This system just shuts the mixture off so that no fuel goes through the carburetor into the intake manifold. This is because the engine is overly powerful for GA needs.Use direct drive and put a stop on the throttle to where it cannot exceed 3,000 rpm. Components are tested in environments far more severe than the engine will 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. Chris Willars. and reaches its maximum efficiency just before the speed of sound. This Hitachi had sleeve bearings and its wear was within limits, so I took out all the internal parts, machined a plate, and mounted two 1986 Hyundai Excel ignition modules 180-degrees apart. As the high performance (623) 842-3902 in AZ. an Aircraft Engine and then later modified for Automotive use when Subaru