REFLECTOR: Update on N173VS static RPM

[Geoff Gerhardt]

As I've described, I recently started up my engine for the first time.
 After sorting out some minor issues with the EI, when I tried to go to
full power, I was only getting ~1900RPM static.  Also, I could only reach
this power when I pulled the mixture lever way back - the engine sputtered
when both the throttle and mixture were all the way in.

On Tuesday night, I discovered that one of my fuel injector lines was
leaking at the connection to the injector (bad solder joint).  I repaired
this and tried it again last night.  But, before I did, I pulled all the
injectors out, turned the fuel pump on and observed their spray.  I
measured their volume output over a 10s period and they were all
approximately equal.  So, I started it up hoping all problems were solved,
but it behaved exactly the same.  This time, though, I was a bit more
observant of some of the engine data.

First thing I noticed was that the Dynon Skyview indicated it was running
very rich.  I forget exactly what the number was, but it was something like
30% ROP.  By pulling the mixture back at full throttle I could maximize
power and the Dynon did show the mixture going from very rich to
perfect/slightly lean (I forget exactly what mixture full power was
reached).  But, my static RPM was still only ~1850-1900 RPM.  It was neat
to see the EGT's bounce around very quickly to these mixture adjustments,
tho.

The second thing I noticed was the CHT's - #3 was running significantly
colder and #2 hotter than ~#1/4.  Here's a snapshot of the temps at one
point from 1:341, 2:409, 3:290, 4:381.  Generally, 1/4 tracked pretty
closely, but #2 got pretty hot and #3 was always at least 50deg colder than
1/4.

Just an update on the history on the engine - it was a 500hr SMOH engine
that I bought from another Velocity owner who was parting out his plane.
 He's an A&P who had bought the engine, pulled off the jugs, inspected the
crank, replaced the rings and had it running on his velo and taxing around.
 He ensures it was running well and I'm taking his word on this.  Since
then, the engine's been mostly sitting in my shop or hanging on my plane
pickled.  This is the first startup since I've rec'd it.

So, I'm going to check the plugs next.  Anyone else have any other
suggestions?

Thanks.

Geoff
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