# Interesting Subaru Site

### Help Support HomeBuiltAirplanes.com:

#### n925cu

##### New Member
The shipping crate was paid for but not needed as the engine was picked up by the purchaser. He never got a credit for the shipping crate.

Good catch.

#### Spinnetti

##### Well-Known Member
Originally posted by Captain_John
Now, this guy sports some pretty compelling evidence for the Subaru junkie!!!

...especially the supercharged variant!

I am a bit of a stick in the mud, though. A Lycoming is simple and tested over time. Hmmmmm, at least I don't have to make a decision tonight!

CJ
I like this stuff, but the super charger makes no sense to me. The WRX and STI are turbo from the factory - why change that?

#### StRaNgEdAyS

##### Well-Known Member
The main reason for looking at alternatives to the factory turbos is that the factory units are designed to run boost for short periods of time only.
In an aircraft installation there are two main factors that need to be considered. Firstly, these turbos will be running at a boost condition for a greater length of time, much more than they were designed for so your bearing life will be reduced requiring either upgraded bearing units of shorter service intervals. Secondly, due to the longer high output duty cycles your Turbine Inlet Temperaures will be higher than those seen in the automotive units (espescially so in rotary engines), leading to more bearing related issues as well as longevity issues of the turbine wheel.
The solution for this is to either spend big bucks on aircraft optimised units or to switch to supercharging.

#### Sparrowhawk

##### New Member
I have the 2.5 litre soob in mine. It seems to run real nice and from my tests this week seems to be putting up about 600 lbs of thrust!
So far Im happy!:smile:

#### Attachments

• 117.5 KB Views: 1,160

#### mikemill757

##### Well-Known Member
I've been researching Subaru conversions, and RAM engines seems to me to be the best bet - info@ramengines.com I've read some not-so-complimentary comments about Eggenfellner, esp. his attitude towards customers, lack of testing (re-drives) and I believe he now sells only the 6 cyl. engines.

#### orion

##### Well-Known Member
Although I haven't dug into this in any level of detail, I like the Ram engines also. The don't seem to push any envelopes and overall seem to have a very reasonable and clean approach to their products. I also like the redrive unit they use (which I think is from Australia?). It looks clean and well designed for the application.

If anyone has had first hand experience with this company, please chime in.

#### bmcj

##### Well-Known Member
HBA Supporter
I have not read through this whole thread, so what I say here may have already been covered.

I understand that the Subaru makes a decent engine, depending on who does the conversion. However, the cost savings of using this engine is usually offset by the need to add a reduction drive to it. Costs for the redrive can run $4,000-$8,000 or more, and many of the redrives are plagued with vibration and reliability problems. In addition, the Subaru engine is water cooled and requires the added weight and complexity of a water cooling system.

If you are looking for something in the 80 or 120 horsepower range, many people are pulling out their Rotax' and Subaru engines and installing the Australian-made Jabiru engines. The Jabiru engine, so far, is proving to be a very lightweight, capable, reliable engine. It is air-cooled and factory support is said to be excellent. Cost brand new for the 80 HP is about $13,000 and the 120 HP is about$18,000. Of course, you can find used ones from time to time for less.

Bruce

#### Topaz

##### Super Moderator
Staff member
Log Member
...Cost brand new for the 80 HP is about $13,000 and the 120 HP is about$18,000....
I think that's the biggest problem wiht the Jaibiru series - the cost. When I was working on an LSA design, $18,000 was more than I was able to budget for the entire airplane. <rant mode> I completely understand the fact that these are limited production engines in a litiginous market, and that all the development cost must be borne upon that limited run, but$20,000 for a 120Hp engine is absurd, especially when non-certificated aircraft engines of equal power are available for a third of that price. I know why the costs are where they are, but like many, I think there has to be a better way.

</rant mode>

HBA Supporter

Derswede

#### BoKu

##### Pundit
HBA Supporter
And just as an FYI, someone has a 3 l Jabiru engine on the Indianapolis craigslist for \$2000.

Derswede
I looked, and didn't find a Jabiru. What did come up was a Subaru 6-cylinder. Interesting, but not a Jabiru by any stretch of the imagination.

#### Derswede

##### Well-Known Member
Apologies, it is a Subaru engine set up for airplane use. Sorry 'bout that.

Derswede