Interesting.
5 AMUs plus needs their plugs and another 700 if you want the pulse fired from the old accessory location of the removed mag instead of a crankshaft sensor. And they recommend their switches instead of the venerable key switch be used. So, really about 6 AMUs plus installation.
Seems not worth it.
Also I’d want to know what they’d say about an aircraft that has a MoGas STC on it but flies with a mix of fuel, mostly 100LL. I didn’t read their STC if it’s on their website to see if it cancels out the MoGas STC it specifies fuel type. Could be an interesting discussion.
Smooth operation is always nice. Smoother is usually better than not. But it’s not enough to justify it.
All the people saying they run LOP better is nearly worthless on a carbureted O-470 since most just wont do it at all.
And the mismash of different plugs and different harnesses sounds unnecessarily complex for a 10% fuel gain.
Using rough numbers that’s give or take, 1000 gallons of fuel to pay itself off. Or put another way, over 100 hours of flight time.
By the way, here’s a funny Tom. I forgot that four years ago they found our engine had been timed two degrees advanced and they retarded it back to where it should have been during annual. Goggling around for anyone who’d done this ignition on an O-470-S led me right straight to my old thread from 2013!
You and everyone else had comments, of course. We thought it was an interesting “find” by the shop.
https://www.pilotsofamerica.com/community/threads/magneto-timing.61111/page-1
Engine has been running great and starts cold or hot happily, but it’s always done that, even before that timing change. Couple of shots of prime when cold, none when warm, and mixture pulled out about an inch and a half at our altitude. She cranks up and goes.
All the flying with the checkride and stuff, she’s probably coming due for an oil change soon. Will have to watch for a nice warm day and go enjoy a little hangar time doing that. Think we have enough oil at the hangar. I double bought last time by accident.
Thought we were out, our usual place was closing in a half hour, grabbed a case, paid, went to hangar, oops. Two cases.
Ha. Oh well, it gets used.
Anyway. 6 AMU for electronic ignition is probably not high on our list of upgrades. But it’s neat that they’re doing it.