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I just learned that SureFly completed the STC for Grummans. So now the question is, which system to go with? Electroair or SureFly? I’m loosely familiar with the difference between the two units in that Electroair requires a head unit to be installed within the cockpit and thus has more wiring. I understand that both units can/need to be connected to manifold pressure which can/might provide variable timing. Does anyone have experience that they could comment on the differences between these two systems and why you’d choose one over the other? Here’s my pro/con list so far.
Electroair
Pro:
– Been available for a while, proven technology (since 2011.)
– One coil for each plug.
– Can retains existing plugs.
– They have their own plugs gapped to 0.032” for 70,000 volts.
– Variable timing based on RPM/MAP.Con:
– Longer install, more parts.
– Requires replacement of mag switch.
– Still have to run expensive aircraft plugs.SureFly
Pro:
– All-in-one unit.
– One coil for each plug.
– Similar size/weight as Slick mags.
– Install rated at around an hour.
– Retains existing switch and spark plugs.Con:
– They do not sell aircraft plugs gapped for higher voltage.
– Still have to run expensive aircraft plugs.
– New to market, less history compared to Electroair.
– I’m reading some reports that it does NOT have variable timing, or not as good as Electroair.I think I’m leaning towards Electroair myself. Your thoughts?
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I had the Electroair installed in my Tiger 14 mos ago by Roscoe. The computer that uses the manifold sensor to advance the spark is a definite plus at higher altitudes. I also aggressively lean my engine and the spark advance algorithm loves it.
I’m a little different than most plane owners in that my budget far exceeds my aircraft costs. So I don’t give much thought to spark plug cost. I actually have a complete back up set for the old and new mags. So I clean and gap them between oil changes. When I do my oil change the gapped and clean set goes in and I’m back in the air in no time. Cleaning and gapping is saved for a rainy day.
The new switch plate Roscoe made for modifying the starting panel goes in real easy, and makes the start panel look cool. Guarded toggles and no key to keep track of. If your worried about theft, asked Roscoe how easy it is to bypass your key switch.
All in all I have been happy with my choice.
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Have you priced the installation costs and time of each and factored that in? What level of expertise is needed to install and maintain? What could you do with a few extra AMUs in your pocket? How many possible component failure points are in each system? BTW the Surefly also has variable timing on the Grumman AA5s under the current STC.
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As 2 years has passed since this post was authored, any updates on experience with either system? We are looking at adding electronic ignition to our Citabria and I will likely add it to my AG-5B at the same time.
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I installed Electroair and have been very pleased with it. I’ve been following a few others that have installed the SureFly and most seem pleased, though I have read of a tiny bit of issues here and there (can’t remember what all they were.)
If I were to do it again, I’d probably still go with Electroair until the SureFly was on the market for longer to develop a bit more history.
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Update: I have sold these for 5 years now at grumman-parts.com. I have one in my Tiger. It is great. I know of one Grumman Mechanic who is getting rid of his electro air now. Reason? Multiple failures for the vacuum advance sensor. I also have an article you can read here: https://grumman-parts.com/surefly-electronic-ignition-review-a-comprehensive-look-for-grumman-aircraft-owners/
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