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  #1  
Old 02-04-2021, 08:50 AM
jclemens jclemens is offline
 
Join Date: Jun 2018
Location: FL
Posts: 21
Default SDS fuel map

I would love to see your SDS fuel map to compare with mine. If you are running an SDS system and could post your ECU settings sheet along with any details of the engine that might be pertinent that would be great!

Here is mine:

IO-360 parallel valve
10:1 compression
Lycon Cam
Sky Dynamics intake/sump
C/S MT 3 blade
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Last edited by jclemens : 02-10-2021 at 03:59 PM.
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  #2  
Old 02-04-2021, 11:34 AM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,288
Default O-360 SDS map

Mine is a O360A4A fixed pitch in a 6A
Set up for basically 12 to 13:1 in normal flight, slightly richer in climb out, & 16:1 in LOP operation, max 33 BTDC when appropriate - hands off.
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Ralph
built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more

Last edited by Ralph Inkster : 02-04-2021 at 11:37 AM.
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  #3  
Old 02-04-2021, 12:57 PM
airguy's Avatar
airguy airguy is offline
 
Join Date: Oct 2006
Location: Garden City, Tx
Posts: 5,389
Default

Quote:
Originally Posted by Ralph Inkster View Post
Mine is a O360A4A fixed pitch in a 6A
Set up for basically 12 to 13:1 in normal flight, slightly richer in climb out, & 16:1 in LOP operation, max 33 BTDC when appropriate - hands off.
Ralph, you're running strictly 100LL, correct?
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2021 dues paid
N16GN flying 750 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, IFD440
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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  #4  
Old 02-04-2021, 01:14 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,288
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Yep. I hate gas cans...
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built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more
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  #5  
Old 02-04-2021, 02:17 PM
jclemens jclemens is offline
 
Join Date: Jun 2018
Location: FL
Posts: 21
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You have any cooling issues with a 12-13 AFR?
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  #6  
Old 02-04-2021, 09:11 PM
Ralph Inkster Ralph Inkster is offline
 
Join Date: Feb 2008
Location: Calgary, Alberta
Posts: 1,288
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11:1 preferable during climb out, but no issues with the 12 to 13:1 during normal or high power cruise.
These settings have been OK for our late summer/fall/winter (in Canada) so far but you might need to map a bit richer if you fly in warm climates. & there is the Knob (which I haven't had to resort to using) if really needed.

I suggest you view Ross's second video on my plane, 'RV-6A Project Part 2', & watch the second half where he reviews the graphical data output and explains how the map is reacting. Note the AFR trend doesn't change much with engine cruise power changes, but does richen up in climb power settings & abruptly changes with the LOP settings. We acknowledge there was a sensor issue causing the AFR varience (which has since been fixed) but look at the general AFR trend with varying power settings.

Also, note this is a fixed prop map. A C/S map may reflect slightly different values in the 2300 - 2500 rpm range due to your ability to load up the engine with more MAP.
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built a few RVs, rebuilt a few more, hot rodded more, & maintained/updated a big bunch more

Last edited by Ralph Inkster : 02-04-2021 at 09:17 PM.
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