Van's Air Force
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Auto plugs?
- Thread starter N184JG
- Start date
G3i Ignition
Well Known Member
I ran auto plugs on my IO-540 with Bendix mags for many hours before developing the G3i ignition system. I have sold harness kits to customers that still have a mag on one side and EI on the other that have converted the stock mag to run auto plugs also.
Here?s a link to convert the standard mag harness to automotive type wires and plugs. Here?s a link on how to do the modification. http://www.g3ignition.com/magmod.html
Thomas S.
Here?s a link to convert the standard mag harness to automotive type wires and plugs. Here?s a link on how to do the modification. http://www.g3ignition.com/magmod.html
Thomas S.
LifeofReiley
Well Known Member
Auto Plugs have been used with Mags for over 60 years. 
Longez
Well Known Member
Auto Plugs
I have been using Autolite 386 plugs with an 18 mm diameter thread in my Lycoming O-235-L2C for over 10 years with no problems.
I gap the plugs to 0.018" for the magneto and 0.035" for the electronic ignition.
I bought a new set at the local auto parts store this weekend for $2.05 each, and I see them for as little at $1.50 on the web. Every 2 years I pull them out and throw them away.
Steve
I have been using Autolite 386 plugs with an 18 mm diameter thread in my Lycoming O-235-L2C for over 10 years with no problems.
I gap the plugs to 0.018" for the magneto and 0.035" for the electronic ignition.
I bought a new set at the local auto parts store this weekend for $2.05 each, and I see them for as little at $1.50 on the web. Every 2 years I pull them out and throw them away.
Steve
http://www.autolite.nl/pdf/pdf-heatrange.pdf
Go to this link. Go down to row 20, 18mm x 1/2".
Go to the column "sheilded resistor"
These plugs were used in AO84 and other military GPU engines.
I just bought a set of the coldest, 2223.
These fit the engine and the stock mag harness.
Cheap too. I got mine from an Amazon listing.
http://www.amazon.com/Autolite-2223-Copper-Shielded-Spark/dp/B000ET3W98 (picture of plug with similar ad)
Sorry I don't have results yet, The plane's not flying yet.
Go to this link. Go down to row 20, 18mm x 1/2".
Go to the column "sheilded resistor"
These plugs were used in AO84 and other military GPU engines.
I just bought a set of the coldest, 2223.
These fit the engine and the stock mag harness.
Cheap too. I got mine from an Amazon listing.
http://www.amazon.com/Autolite-2223-Copper-Shielded-Spark/dp/B000ET3W98 (picture of plug with similar ad)
Sorry I don't have results yet, The plane's not flying yet.
Last edited:
Longez
Well Known Member
Autolite 386
I mostly burn 100LL, but several years ago I burned a lot of premium auto gas (in cruise) when I had a trusted supply. I put 100LL in one tank and premium auto in the second. I took off and landed using 100LL. These plugs have worked well in all cases.
Yes, I made my own harness.
Steve
I mostly burn 100LL, but several years ago I burned a lot of premium auto gas (in cruise) when I had a trusted supply. I put 100LL in one tank and premium auto in the second. I took off and landed using 100LL. These plugs have worked well in all cases.
Yes, I made my own harness.
Steve
I use Champion D9s. They are 18 mm. No adapters, no detonation, I used adapters for years with all kinds of plugs with nothing but trouble. Went to d16 plugs but they were too hot and I got detonation above 11000 ft.. Went to d9 and problem solved... No problems up to FL 180....
Tailwinds
Doug Rozendaal
F1 io-540. 9.5-1 pistons.
Tailwinds
Doug Rozendaal
F1 io-540. 9.5-1 pistons.
