throttle which is contrary to what others told me. Closed loop is excess
fuel for the non existent CAT converter and max EGT so I can actually
cut another 5% by leaning further manually but I don't bother.
The only thing I can think of that would help either of us further is
running wide open throttle. That reduces pumping losses. Of course then
you'd need a variable pitch prop to do that and the additional weight.
I don't believe any of the claims that the soob can go below about .40
sfc under perfect conditions or that it is really any better than your
setup. That is diesel territory ;)
Ken
Walter Klatt wrote:
Ken, are you able to fly at low enough power so your soob can utilize closed
loop? As I understand it, higher power and open loop uses more conservative
programmed settings and is not quite as efficient, making it closer to a
Lyc/Cont.
My 360 Superior clone engine specs claim .5 gph improvement over Lyc for
cruise power settings, and an SFC of .43 lb/hp/hr. That is due to their new
sump intake design which is supposed to deliver more even fuel distribution
to all cylinders. They also say you can run up to 80% power (roller tappet
cam version) with full leaning.
Then on top of that I have the EI, so I am not surprised that my 360 uses
less fuel than my old 320. I can easily confirm .5 gph saving, but I think
it could be even higher, maybe 1 gph. I knew my 320 very well with my fuel
monitor, and was able to tweak the maximum fuel economy out of it, I'm sure.
But because I was breaking in my 360, I haven't pushed it too hard there
yet. Next summer, with a few more trips, I should get a better idea. I have
the EI display now also which shows the dynamic timing advance and MP, so
have everything I need to find the sweet spot on this one.
People have mentioned that Lycs run rough at lower rpms. Maybe some do, but
my old 320 was very smooth at 2000 rpm and 5 gph. Maybe it is because mine
is a floatplane with the finer pitched prop, so had a lower MP setting at
that rpm than with a coarser pitch. I did that a lot at the lake when giving
people rides there. Haven't tried my 360 yet at 2000 rpm cruise or 5 gph,
but I will.
Walter
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------
