Group,
If you use coils with a floating secondary (two lead coils) to fire both plugs, DO NOT USE FINE WIRE ELECTRODE PLUGS. You can easily tell if your coil is floating secondary. A ohm meter will indicate that the two high tension leads are connected. If yours are don't use fine wire (or rare metal fine wire) center electrode plugs. One of the two plugs fires backward and it will quickly erode. My motorcycle experience was that the fine wire would "mushroom" and become ineffective. They are not designed to be on the recieving end of the spark! Bikes used these coils in their cheap ignition systems early on. We had lots of problems with the platinum plugs. They run great at first and them started to have trouble on motorcycles in about 500 miles! Standard plugs would last thousands of miles although with a magnifier you could tell one of the two plugs was more eroded
Bill Jepson
-----Original Message-----
From: Al Gietzen <ALVentures@cox.net>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Tue, 14 Mar 2006 07:19:37 -0800
Subject: [FlyRotary] Re: sag solution ??
Jesse, as best I recall, Tracy Crook has always mixed Mystery Oil with his gasoline. Perhaps that is why he gets such a long run on plugs rather than just his use of auto gas. Interesting indeed, would sure beat trying to replace/clean plugs every 20 hours using AvGAs.
Ran into SAG on way home from Texas, so going to replace the plugs this week. I think I'll get some MMO and mix it in the gasoline and see if it makes any different in the TBR I get on plugs.
PL?s opinion ? FWIW. If Tracy has been adding it he would know. I don?t see that baking it at 500F in a cat food can translates to running it through a rotary mixed with the gas.
Have you tried iridium plugs? Al
If you use it in the fuel it breaks down and leaves a lot of crud on the rotor.
Put a tea spoon worth in a small cat food can and bake it in the oven for one half hour at 500F. Do the same with 2 cycle oil and see the difference.
For sag try the iridium plugs used in the RX8 engine.
Paul Lamar