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  #1  
Old 08-22-2018, 01:21 PM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,781
Default SDS EFI RV6A Video Project

I've been talking about this for some time and we are finally able to start this thread.

The intention is document the process of tuning our EFI on a Lycoming 360 in photos and regular videos. The test subject is a 6A rebuilt by friends Ralph Inkster and Howard Brekke. The aircraft is located just up the street from us.



This morning was a big milestone with the first engine start and setting the initial ignition timing. Engine idle was excellent down to 650 rpm on the base settings, just turning the mixture knob slightly.

I'll be putting together a video on YouTube tonight and post the link here.

The plan is to post a new video roughly every 7-14 days as we progress through initial mapping on ground runs to first flight, air tuning and performance testing eventually. I'm hoping this will be helpful and informative for people considering or already installing/ using SDS EFI. Stay tuned.

I started a new web page for this project too: http://www.sdsefi.com/projectrv6a.htm
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm



Last edited by rv6ejguy : 08-22-2018 at 02:35 PM.
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  #2  
Old 08-22-2018, 07:22 PM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,781
Default First Vid

https://youtu.be/5U8f8lAQe6I
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #3  
Old 08-23-2018, 10:02 AM
slngsht slngsht is online now
 
Join Date: May 2016
Location: Purcellville, VA
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Default

you mentioned a mixture knob. Is the mixture knob basically setting a target A/F ratio electronically?
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  #4  
Old 08-23-2018, 01:07 PM
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rv6ejguy rv6ejguy is offline
 
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Default

The mixture knob trims whatever injector pulse the ECU is delivering at the time. You can go +/- 50% from the 12 O'clock (0% trim) position.

Most folks will use this to manually lean once cruise power is set and for running LOP.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #5  
Old 08-23-2018, 08:43 PM
slngsht slngsht is online now
 
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Location: Purcellville, VA
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So running open loop at that point?
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  #6  
Old 08-23-2018, 09:04 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 418
Default

Running 100LL. Open loop is the only option.
Will be using the O2 sensor for tuning only.

I haven't been a member of the 'Gerry Can' toting gang since I finished the Turbo Subie 7, 10 years ago, we needed to run Premium Shell in that one. This 6A is meant to be a cross country machine so will use commonly available fuel.

Maybe in 10, 20 or 30 years\... when ever they finish their endless UL testing, we'll throw the switch.
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Maintain lots, upgraded & repaired some, modified more, rebuild a few, & built 4 of 'em

Last edited by Ralph Inkster : 08-23-2018 at 09:26 PM.
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  #7  
Old 08-23-2018, 09:28 PM
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rv6ejguy rv6ejguy is offline
 
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Location: Calgary, Canada
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Quote:
Originally Posted by slngsht View Post
So running open loop at that point?
Correct. Leaded avgas reduces O2 sensor life substantially in many cases so that limits our ability to reliably use closed loop feedback control. Swift unleaded 94 avgas is becoming available in more places across the US which is a good start. https://swiftfuels.com/ul94-map/

While the present SDS already has closed loop control software, it targets stoich (near peak EGT) so is not usually used in aviation applications.

The next gen ECU will have more sophisticated closed loop capability as unleaded avgas comes into more widespread use in the future. Some places in Europe have pretty good UL avgas availability already.

We do think it will be a few more years before there is a "universal" unleaded avgas in North America. The FAA PAPI program evaluating UL avgas was recently put on hold for more study on the fuel formulations and their impact on operations. That probably wasn't what most people wanted to hear but at least Swift took the initiative a few years back and started selling their blend.

This RV6A will eventually help us develop and test new closed loop control software for the EM-6 ECU under development now.
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm



Last edited by rv6ejguy : 08-23-2018 at 09:42 PM.
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  #8  
Old 08-25-2018, 09:53 PM
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rv6ejguy rv6ejguy is offline
 
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Location: Calgary, Canada
Posts: 4,781
Default Part 2 Video

Aircraft programmer basics.

https://youtu.be/rnneWX1vGN0
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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  #9  
Old 09-10-2018, 08:15 PM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,781
Default Part 3

This is a basic introduction on using the PC data logging feature to tune the SDS EFI system on the ground. After many painful editing tribulations, I was finally able to get this rendered in an H.264 format today.

https://youtu.be/nzeYz1xpu-Q

We'll work on Part 4 after Reno and this will describe more in depth on how to interpret the data logging results and make changes with the programmer.
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 424.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


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