From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Danny
Sent: Monday, February 18, 2013
11:21 PM
To: lml@lancaironline.net
Subject: [LML] Re: Which 360?
I don't
know the difference between all the variants of the IO-360, parallel
valve. But, you can read about it here if you haven't already.
For
starters I do know a few things.
Get a
forward facing sump for sure. You can bolt on a Superior or other brand cold air sump on just
about any of the 360's. This will allow you to make a much tighter
cowling. A rear facing sump is out of the question as your nose gear
is directly behind the sump. (might fit with the long engine mount?
I doubt it) But, I wouldn't let the "stock" configuration make
me pass up a good deal on an engine.
In my
opinion, I would get a forward mounted prop governor. The back of the
engine is busy enough I think, but I have the short engine mount..
Compression
ratio will depend on what you want to accomplish. If you want to run MoGas for example, need to keep it rather low. 8.7:1
and lower I think?
It
seems many of the other variants relate to what type of mag setup. I have
dual impulse coupled Slick mags. But, this is 2013 now, and if I was starting
over I would have some sort of electronic ignition on one or both sides.
So again, the variant doesn't really matter as you would probably not use mags
anyway.
So in
summary, I would buy whatever is less expensive to get you the compression
ratio you want, and the forward prop governor. Then, scrap the rest of it and
build it with modern aftermarket accessories. (Ignition, Cold air sump, Fuel
servo, etc) So the actual "stock" variant isn't that
important. Financially this may not make sense if your buying a new
complete engine kit, rather than just the core parts. Maybe get some
quotes from some of the build shops and only buy what you need, rather
than paying for a sump and mags you don't want. Barrett comes to mind :)