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View Poll Results: Ignition & Fuel system combination
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Carburetor with one electronic ignition and one magneto
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26 |
13.33% |
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Carburetor with two electronic ignition
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24 |
12.31% |
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Fuel injection with one electronic ignition and one magneto
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39 |
20.00% |
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Fuel injection with two electronic ignition
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82 |
42.05% |
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No electronic ignition
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24 |
12.31% |

08-07-2017, 07:14 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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Electronic ignition and fuel systems (poll)
I've always been curious about the different combinations of fuel and ignition choices builder / owners make with their airplanes.
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08-07-2017, 07:23 AM
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Join Date: Jan 2005
Location: NC25
Posts: 3,508
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Quote:
Originally Posted by humptybump
I've always been curious about the different combinations of fuel and ignition choices builder / owners make with their airplanes.
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One thing left off the poll would be dual electronic ignition and dual mags.
The LASAR and G3i systems are both dual electronic with dual mag backup.
__________________
Gary A. Sobek
NC25 RV-6 Flying
3,400+ hours
Where is N157GS
Building RV-8 S/N: 80012
To most people, the sky is the limit.
To those who love aviation, the sky is home.
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08-07-2017, 07:40 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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Another choice which is gaining momentum is dual EFI and EI, such as the SDS system I'm installing.
As a fallback choice, my last 3 airplanes have been injected (Bendix) and dual EI.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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08-08-2017, 04:00 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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Interesting results thus far with 45 respondents.
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08-08-2017, 04:16 AM
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Join Date: Nov 2006
Location: Savannah, GA
Posts: 1,029
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My choice is "other" - - full electronic fuel injection and ignition. (SDS).
__________________
RV-7ER - finishing kit and systems installation
There are two kinds of fool in the world. The first says "this is old, and therefore good"; the second says "this is new, and therefore better".
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08-09-2017, 10:40 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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The sample set is not very big (81 data points at present) but the "trend over time" has been interesting to watch.
The general trend of responses has been 2:1 in favor of fuel injection vs carburetor. On the carburetor side, the responses have trended 2:1 in favor of a single EI while on the fuel injection side it has trended 2:1 in favor of dual EI.
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08-09-2017, 11:29 AM
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Join Date: Aug 2007
Location: Ontario, Canada
Posts: 2,291
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A comment on your trend observations, Glen... It's been my observation that some of those who tend to operate from "less improved" airstrips and over less populated land often do their systems planning with independence in mind. The carb guys (I'm one) keep a mag because the combination of carb and impulse-coupled mag means one has the ability to get started while out in the boonies, long after some idiot left the master switch on and made hand propping a necessity. I've gone one step further by installing a manual priming system, again to avoid any dependence on the flow of electrons.
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08-09-2017, 11:54 AM
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Join Date: Dec 2014
Location: SPring lake NC
Posts: 120
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Poll
Dual EMAG PMAG with Fuel Injected engine plus GAMMI injectors = one smooth fuel efficient machine!
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08-09-2017, 12:05 PM
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Join Date: Sep 2007
Location: BC
Posts: 1,674
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Quote:
Originally Posted by Canadian_JOY
A comment on your trend observations, Glen... It's been my observation that some of those who tend to operate from "less improved" airstrips and over less populated land often do their systems planning with independence in mind. The carb guys (I'm one) keep a mag because the combination of carb and impulse-coupled mag means one has the ability to get started while out in the boonies, long after some idiot left the master switch on and made hand propping a necessity. I've gone one step further by installing a manual priming system, again to avoid any dependence on the flow of electrons.
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That's cool. I would like to know more about how you accomplished manual priming.
Bevan
__________________
RV7A Flying since 2015
O-360-A1F6 (parallel valve) 180HP
Dual P-mags
Precision F.I. with AP purge valve
Vinyl Wrapped Exterior
Grand Rapids EFIS
Located in western Canada
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08-10-2017, 05:51 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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Quote:
Originally Posted by Canadian_JOY
A comment on your trend observations ...
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I don't think I'd ever be able to Devine the "why" in the data. With such a small sampling - currently a little over 100 out of thousands - there are definitely too many variables to make many scientific observations.
I also think there is a case for the "observer effect". While the poll is not quantum physics, the fact I commented about observed trends has changed those trends.
Currently, fuel injection is almost 3:1 compared to carburetors. The fuel injection responses have surged. The carburetor data is still trending 2:1 in favor of a single electronic ignition while fuel injected installations are narrowing a bit to 1.7:1 while still favoring fuel electronic ignition.
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