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Old 01-16-2020, 12:12 PM
flashverde flashverde is offline
Join Date: Jun 2019
Location: tacoma
Posts: 19
Default buying an engine piece by piece????

I am planning ahead several months on the engine for a 14 project. Not interested in the $35-40k 390 option. Want to end up with 190 to 200 hp with efi and ei. Buying a used 360 is an option but still have to go through it and that adds up quickly. There would be parts I don't need.
So does it make sense to buy the parts over the next several months?? A case, crank, cam, lifters etc. The cylinders, I would buy new. I have experience building auto engines but none with aircraft engines.
So if this approach is viable, where do I find out the part #s that work, ie what crank goes in what case and what cam to use etc??
I am obviously a newbie and all advise is appreciated. My ideas have been called crazy before and I survived
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Old 01-16-2020, 12:27 PM
David Paule David Paule is offline
Join Date: Dec 2009
Location: Boulder, CO
Posts: 4,416

The nearest Lycoming engine to the version you want will have a parts manual. Buy it. It'll have pictures and lists of the parts you need.
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Old 01-16-2020, 12:41 PM
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Ironflight Ironflight is offline
VAF Moderator / Line Boy
Join Date: Jan 2005
Location: Dayton, NV
Posts: 12,224

Agree with David - just find the right parts catalog from Lycoming. Fortunately, most of Lycoming's publications are now appearing free open the internet (on Lycoming’s web site!). For instance:

Paul F. Dye
Editor at Large - KITPLANES Magazine
RV-8 - N188PD - "Valkyrie"
RV-6 (By Marriage) - N164MS - "Mikey"
RV-3B - N13PL - "Tsamsiyu"
A&P, EAA Tech Counselor/Flight Advisor
Dayton Valley Airpark (A34)
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Old 01-16-2020, 01:02 PM
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Pilot135pd Pilot135pd is offline
Join Date: Jan 2019
Location: Vaca Moo Airport - TA37 in East TEXAS
Posts: 1,331

That's how mine was built. An entire laundry list of parts were purchased and an engine shop put it all together piece by piece, 455 hours ago and going strong !
RV-8 N52VM: OnSpeed Gen2 AOA-3D, Dynon D-180, Autopilot, Titan 0-360A1A, Hartzell C/S, INS-429 IFR & GPS496, WingX & Stratux for backup & ADS-B IN. Enjoying life while building an airpark with FREE campsite for pilots

Exempt by 3 out of the 10 ways but I still donated.
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Old 01-16-2020, 01:42 PM
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rmartingt rmartingt is offline
Join Date: Nov 2006
Location: Savannah, GA
Posts: 1,026

I'm in the process of doing that right now. Started with an inspected and tagged core and went from there. Just a few more stock parts and the SDS system to order, and we'll be ready to build. A local mechanic with a lot of Lycoming experience will be supervising.
RV-7ER - finishing kit and systems installation
There are two kinds of fool in the world. The first says "this is old, and therefore good"; the second says "this is new, and therefore better".
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Old 01-16-2020, 02:40 PM
jacoby jacoby is offline
Join Date: Jul 2018
Location: WNC
Posts: 244

I've been researching this as well and have been wondering: is there some sort of compatibility or change matrix available? I know there is a publication that shows the difference between the various suffixes, but is the parts catalog the final say on what can be interchanged between models?

Specifically I've been looking at the IO-540-D4A5 for the RV10. Based on the parts catalog the crankcase and crank is compatible with only the -C4B5. Is that true? Or is it the case where one case has something tapped or not tapped or whatever and is otherwise compatible?
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