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CH601 engine

 
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mtherr(at)yahoo.com
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PostPosted: Tue May 02, 2006 6:19 am    Post subject: CH601 engine Reply with quote

Hi again!

A friend and I recently made a significant decision.
We both enjoy flying and building, and we were both
interested in gaining more power for our aircrafts.

My 601-HD is powered by a Subaru EA-81 that runs very
well since last spring (before that, let say that the
fine tuning effort was a never ending process). While
the engine works well, I see my flying hours going up
fast and it was a done decision that instead of
eventually overhauling the engine again, I would have
a real aircraft engine (I guess the fine tuning year
affected me a bit).

When we saw the Franklin engine sales on the net, we
looked for what it involved. Then, a few weeks ago,
we decided to make the plunge and buy 2 engines (one
for me). The engine is now in my garage and I know
what I'll be doing when I finish working around the
house. I expect to fly behind a 125 hp engine next
year!

This said, I'll have for sale:
- a complete (read complete) FWF installation (with
engine, redrive, mount, prop, cowling, radiator,
radiator mount, manifold, air box, exhaust, etc etc
(approx 140h SMOH--I'd have to look at the engine log)
- a second rebuilt subaru engine short bloc (perfect
except one defective lifter) (approx. 100h SMOH)
- a second set of heads
- boxes of spare and complementary parts
- a box of distributors
- books, manuals, engine log
- and whatever I forget now.

The engine is fairly much tuned. I still find that
valves do not last very long before leaking, but I
would say the whole thing is pretty much satisfying
(when we look at flying/maintenance hour ratio Wink

I will have that for sale somewhere in fall or winter
when I'm ready to mount the new engine on the plane.
In the mean time, I'll definitively continue to use
it.

Michel
do not archive
----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby

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Bill(at)flyinmiata.com
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PostPosted: Tue May 02, 2006 7:10 am    Post subject: CH601 engine Reply with quote

Michel,
Could you elaborate on the "valves don't last long before leaking"? Are
you burning valves?
Bill Cardell (TurboDog's Dad)
www.flyinmiata.com
1-800-FLY-MX5S
tech 970-242-3800

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mtherr(at)yahoo.com
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PostPosted: Tue May 02, 2006 8:52 am    Post subject: CH601 engine Reply with quote

Not burning valves. Initially, my engine was running
fairly lean and after 30-40 hours, intake valves would
leak. Last year, when I installed my second engine
which has a different cam from my 1st one, all genuide
Subaru parts and ported heads, I also tuned the
carburator. This time, after 100 hours, I had intake
valves leaking again. I looked at with the the
machinist and he found that the valve seat gets
distorded. The seat for the intake valve is really
close to the tip of the spark plug (when compared with
the exhaust seat). And the spark plug threads extend
right next to or even into the intake seat. I got a
valve job done a month ago (it is a simple affair now
that I'm used to it Wink and this time, he ground the
threads that should not be there (to reduce the
surface area collecting heat)... we'll see.

The valves were all nice.

Michel
do not archive

--- Bill Cardell <Bill(at)flyinmiata.com> wrote:

Quote:

<Bill(at)flyinmiata.com>

Michel,
Could you elaborate on the "valves don't last long
before leaking"? Are
you burning valves?



----------------------------
Michel Therrien CH601-HD, C-GZGQ
http://mthobby.pcperfect.com/ch601
http://www.zenithair.com/bldrlist/profiles/mthobby
http://pages.infinit.net/mthobby

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