Here's a shot of the EM-2 taken today on my flight back from attending
the LaGrange BBQ fly-in.  Altitude was 4700 msl, OAT was about 50F.  The
engine is just loafing at 6000 rpm (M/T electric prop was set to 2000).
The faster I run this engine, the more it wants to go.  I can't wait to
see what it will do when I really open it up.

Note: Oil temp shown is pan temp.  I measure return oil temps with the
EFIS.  Oil temp typically run 5-10* above the coolant temp.

Mark

That is pretty good. My C182 gets 10 MPG but I am only doing 150 MPH.
The EGT looks a bit high. Are you leaning?

I think the oil temp is still being affected by the heat from the
close proximity of the exhaust manifold. I would extend the oil cooler
duct out through the opening in the cowl and radius it. Rutan used that
trick in one of his airplane designs. It shook around independent
of the cowl.

Paul Lamar.

PS I forget to mention. If you shield the muffler it will block
some of the air going through the cooler. A rock and a hard spot.
IMHO the oil cooler would be better off on the other side.



Paul,

Did you not see my note that the oil temps shown on the EM-2 were
measured in the oil pan?  Return temps are around 25* lower than the pan
temps.

Also, your photos of my engine install are out of date.  I'm no longer
running the tangential muffler.  I went back to the 3-into-1 exhaust
that I used initially.  Performance picked up significantly, and EGTs
dropped a bunch.  I'm presently gathering pieces for my next exhaust
system.  The current exhaust has a shield between the exhaust and the
oil cooler, and it is streamlined for enhanced airflow.

Attached is a recent in-flight picture of my EFIS (sorry for the
blurriness, it was a bumpy day).  Note the oil & coolant temps.  How
much cooler do they need to be?  I had stuffed a t-shirt into the
radiator plenum to help keep the temps above 130*.

Mark S.


Your right! I missed that point. I assume you mean by return temps
oil coming out of the oil cooler is 25 F cooler. Very impressive.

Paul Lamar

Paul,

And if anyone asks what amperage is required for a 3-rotor running 5100
rpm, you can tell them it takes 7.1 amps.  I assume this would be linear
with RPM.

Mark