Finn Lassen wrote:

This morning I saw some numbers that didn't make much sense to me:

5500 RPM, WOT at 5000'
Fuel flow: 15 GPH
Airspeed: 180 mph (two way GPS)
Oxygen sensor: 820mV (slightly rich)
EGT about 1600F (I'm seeing as much as 1760F when I pull throttle back
and mixture leans and oxygen sensor drops to less than 500mV)

The prop is obviously overpitched, but even guessing at a SFC of .6 can
the 13B produce 150 HP at 5,500 RPM?

Does anybody have a formula, table or curve of oxygen sensor readings
versus fuel consumption (SFC)?

Finn

I don't think 150 HP at 5500 RPM is out of the question. 
Is it ported Finn? Airspeed sounds about right for 150 HP.

Not directly. This is all I have right at the moment. I will see what 
else I can come up with.

Paul Lamar
 
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