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engine

Posted: June 5th, 2013, 3:44 pm
by exskimmer
I bought a subaru ea 81 that has been converted for an aircraft, my question is this is anyone running a ea 81 in a explorer ? It has a 2 barrel holly carb dual ignition ect.

Re: engine

Posted: June 5th, 2013, 6:05 pm
by dnantha
Im not the expert here. But if you have an aircraft conversion EA 81 you could probably sell it for enough bucks to finish your explorer and buy another normal subaru motor for your Explorer. Just my opinion and probably has flaws. You and that motor arent anywhere out here in the Northwest USA are you?...Dan (not an expert) out

Re: engine

Posted: June 5th, 2013, 9:34 pm
by WerkSpace
I went a different route. I bought a Chevy Sprint intercooled, turbocharged, 3 cylinder, 1 liter car for $300.

The engine is so light that it can be lifted out without any equipment. http://www.raven-rotor.com/
Raven Redrives is quoting 80hp at 159lbs (with the redrive which I won't be using)

If you wanted more power the 4 cylinder version can put out 115hp at 190lbs with the redrive.

The reason that I chose this engine is its price and availability.
These little cars were made by five different manufacturers and parts are readily available.
My complete gasket kit was $89 including head gasket. A total rebuild can be done for as little as $500.
Light weight engine, very flat power curve, extremely fuel efficient, what more could you ask for?

The trike guys love these little motors for their aviation hobby. https://www.youtube.com/watch?v=9SgD5BoXj8g

Re: engine

Posted: June 6th, 2013, 10:52 am
by exskimmer
The explorer has been running since 2000 with a EA 82 buts its getting tired, the EA 81 I got dirt cheap, I may put it up for sale, and overhaul my EA 82. I won't have to make a starter adaptor, the EA 81 has its bell housing machined off to accomodate a redrive.

Re: engine

Posted: June 6th, 2013, 1:17 pm
by jchovernut
I believe the EA81 is lighter than the EA82 since it's a pushrod engine vs OHC. It should bolt right up to the existing structure. I'm going the route of WerkSpace with my Prospector, though. I'm trying to source the G13BB Geo/Suzuki MPFI engine and possibly turbo version as well. I attended a few automotive aircraft engine seminars put on my Jeron from Raven ReDrives at Sun-n-Fun and that engine is really quite a capable little thing! The Honda Fit engine seems to be the newer darling of the auto-airplane engine aficionados. It's MPFI and turbo'd as well, and a newer model. The airboaters here in FL are toying with the new Ecotec & Ecoboost engines with pretty good results. Lots of good choices out there...it's a matter of getting all the associated electronics/computer/harness... ugh!

John Carter

Re: engine

Posted: June 6th, 2013, 3:31 pm
by WerkSpace
John, you can go to your local auto salvage yard and find a tiny turbo in most of the newer cars or motorcycles. The boost is only 6 lbs, so it doesn't take much of a turbo. Also, look for the intercooler as it makes quite a bit of difference. It's fairly easy to fabricate your own custom exhaust system to fit almost any brand of tiny turbo. (BTW - the turbo rebuild kits are very inexpensive, so rebuilding them is also an option.)
jchovernut wrote:I believe the EA81 is lighter than the EA82 since it's a pushrod engine vs OHC. It should bolt right up to the existing structure. I'm going the route of WerkSpace with my Prospector, though. I'm trying to source the G13BB Geo/Suzuki MPFI engine and possibly turbo version as well. I attended a few automotive aircraft engine seminars put on my Jeron from Raven ReDrives at Sun-n-Fun and that engine is really quite a capable little thing! The Honda Fit engine seems to be the newer darling of the auto-airplane engine aficionados. It's MPFI and turbo'd as well, and a newer model. The airboaters here in FL are toying with the new Ecotec & Ecoboost engines with pretty good results. Lots of good choices out there...it's a matter of getting all the associated electronics/computer/harness... ugh!

John Carter

Re: engine

Posted: June 7th, 2013, 6:55 am
by bphillip2
Keep in mind we need to keep the rpm of the engine below about 4300 to make the craft drive-able.

Re: engine

Posted: June 7th, 2013, 9:39 am
by WerkSpace
Bryan can you explain your statement below? (reduction pulleys will keep the prop and fan speeds within their limits.)
bphillip2 wrote:Keep in mind we need to keep the rpm of the engine below about 4300 to make the craft drive-able.

Re: engine

Posted: June 7th, 2013, 12:24 pm
by jchovernut
I think what Bryan's saying is that with the fixed-ratio drive of the prop and fans, there's a 'sweet spot,' or range of RPMs that work best with the type of drive system on the Prospector/Explorer. As independent fan speed controllers and in-flight adjustable pitch props become available, a wider range of engine RPM will be available for use.

John Carter

Re: engine

Posted: August 9th, 2013, 2:21 am
by catamaran50
Hi, is the pulley system bolted onto the fly wheel only on the explorer? I am going to build one and now considering putting in a honda 1.5 I vtec engine.
What trust fan and uplift system would you recommend?
Brian