Hi there Steve
Thanks for your work here.
How do you measure the BSFC?
So you have a version of the EC software where you can still change the Staging point MAP.
The BSFC is ~0.5 better unstaged. Is this due to better fuel-air mixing or is something else at play?

Am I right in thinking that at an economy cruise, a BSFC change of 0.5 might yield an approx 0.9G/hr ($5/hr) of fuel saving.
That might then argue for a Staging Point at the earlier 15.5” MAP to enable unstaged cruise rather than the locked in 20” MAP of the current software version.

What is your thoughts and conclusion if you have reached any?

Thanks again Steve

Steve Izett

> On 26 Jun 2020, at 8:47 am, Steven W. Boese SBoese@uwyo.edu <flyrotary@lancaironline.net> wrote:
>
> I ran a test on my engine stand with staged and unstaged fuel injectors but with the same fuel flow and MAP.  The results are shown in the attached image.  The engine is a 2010 2nd generation Renesis 6 port from an automatic transmission car with the high RPM ports blocked off and stock fuel injectors.  The reduction drive ratio is 3.18:1.  The prop is a 3 blade 72" Warp Drive and was operating just below stalled RPM.  A turbo is installed but no boost was used in the test.  No attempt was made to operate at minimum BSFC.
>
> Steve Boese
> <BSFC.jpg>--
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