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  #1  
Old 02-21-2020, 05:18 PM
kearney kearney is offline
 
Join Date: Dec 2006
Location: Canmore, Alberta, Canada
Posts: 31
Default EFI/EI Flight Data

Hi

Yesterday I decided to collect a little real world data flying behind the SDSEFI.COM Electronic fuel injection / electronic ignition.

To start I have been tuning my ECU maps so that I don't need to touch the mixture knob. I have set the maps so that at altitude the engine is running close to best power / stoichiometric. When I flip the magic LOP switch, I set it so that the spark is advanced by 6 degrees and the engine is leaned by 8% or so. I was shooting to be running LOP by 40 - 50 degrees.

The table below shows the results. The data was collected when it was a bit bumpy at lower altitudes but directionally it seems consistent with what I was shooting for. The spark advance seems to have offset the power loss I would have otherwise seen as I reduce fuel flow.

I do like being able to tweak the engine in flight!

My apologies for the poorly formatted table - I couldn't sort out how to make it presentable when posting.

Norm LOP
Avg Avg
Alt MP RPM OAT FF TAS CHT MPG FF TAS CHT MPG %

10000 21.1 2390 27 12.5 167 348 13.36 11.6 162 341 13.97 0.05

12000 19.8 2390 17 12.4 165 347 13.31 11.4 168 346 14.74 0.11

14000 18.3 2390 8 11.8 161 352 13.64 10.7 164 338 15.33 0.12

16000 16.8 2390 -2 11.2 156 339 13.93 10.5 163 328 15.52 0.11

18000 15.5 2390 -12 10.5 159 327 15.14 9.9 160 325 16.16 0.07
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Les

RV10 C-GCWZ Sold and now vacationing in Tulsa
RV10 C-GROK Flying

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Last edited by kearney : 02-21-2020 at 05:29 PM.
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  #2  
Old 02-22-2020, 11:16 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 715
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Hey Les.
Time to update your profile! Unless you want everyone believe you commute 200 miles to your hangar (down the taxiway from me) daily!!
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  #3  
Old 02-23-2020, 10:02 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 715
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Yep. Officially neighbours again.

PM sent.

Cheers
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