WTB: TSIO-550, core only

[admin]

Hi Guys,

Please excuse me if I'm posting out-of-place. I've recently purchased a IV-P which needs an engine (among other things, including panel....so I'll see about ordering through this site when the time comes).

I would like to have the engine built by Western Skyways (as I have a good relationship with them, and live relatively close, so I toured their shop with the owner about two weeks ago, and they've done a TOH for me in the past year, etc).

I would really appreciate some help in finding a core. The project has a phenomenally-built airframe (never flown but has airworthiness cert). An aerospace engineer built it for himself, but wants to use a different airframe for a project he's currently working on. This IV-P will be done very, very well, so I'd rather start with a core that doesn't have too many hours on it. I am told that I just need a repairable engine, and virtually none of the accessories, but will need the accessory gears.

As I understand now (and PLEASE, any and ALL information is greatly appreciated !):
I need a TSIO G-N-E or K.

The intakes need to be on the top, and so I believe the "C" version is out.

I've tried looking around, but there are only completed, rebuilt engines, or those with all the accessories (there's one from a Cirrus SR-22, which is pretty good, except it has everything with it...most of which, I can't use).

Also: does anyone know if I can use an IO-520 core to make a TSIO-550 ? I had heard some question that this core has the same case, crank, cam, etc and can be used as well.

Appreciate it!

[Scott Fordham]

E is what most have 350hp. C is ok, just a de-rated certified E. G is geared I believe so don’t do that to yourself. K is the one made for Cirrus that just runs at 2500 rpm (I don’t know anything about em) N is normally aspirated

[J.C. Peterson]

E is what most have 350hp. C is ok, just a de-rated certified E. G is geared I believe so don’t do that to yourself. K is the one made for Cirrus that just runs at 2500 rpm (I don’t know anything about em) N is normally aspirated

The TSIO-550G are on the Mooney Acclaim, but they don’t have gear reduction. They’re turbonormalized and have 280 HP at 2500 RPM.

Don’t confuse that with the GTSIO-520 & 550. The 520s are in Cessna 421s. The geared 550s are extremely rare, and I’m not sure what aircraft they were even used in.

[Peter Craig]

It'll definitely be an E. But is the case, crank and cam the same on the others? Can the others be made to be an E? Anyone happen to know of differences? Maybe I'll need a conversation with Continental...if that's even possible. Thanks guys!

[Steve Richard]

Try theses guys: https://coairparts.com/

[Tom Thibault]

Peter,
Talk to Rhonda Barrett at Barrett Precision Engines in Tulsa. I think they have an STC to turn a 520 into a 550. I assume you already have all the accessories??? If you want a tested engine ready to install, you could ship everything to BPE and let them provide the core to do it. Or have her ship a built up core to you/Western Skyways.