Jesse, I sent an e mail to these folks asking them if they had any data on
how their plug performed under fouling conditions - both carbon and lead.
Be interesting to see what the response is - if I get one of course.

$25 is a lot to pay when the stock ones run $5-7 a piece, but if you fly
much with 100LL then you will find you need to replace them around 25 hours
or so.  So if this plug overcame the fouling problem and gave a much longer
life, then they might be worth the price for that reason along.

Ed
>> Isn't 25 bucks each a lot to pay for an air gapped plug ? There may be
>> more to them than that but that is my first reaction. We used to have to
>> move plug wire back off plug or cut small gap in wire to get a plug to
>> fire when valve guide seals went out and/or some other reason loaded
>> combustion chamber with oil. I first learned that from seeing used cars
>> when worn out and using a lot of oil with wire gapped and taped where
>> didn't notice. <g>
>> jofarr, soddy tn
>>

It won't prevent fouling. If you have carbon on the insulator it will foul, end of story. The problem isn't having enough voltage to fire. The problem is being sure that the discharge jumps the gap instead of running down the face of the insulator in the carbon. You can have a million volts but if the spark runs on the surface it won't run any better. I have seen all kinds of high energy CDI systems. They never worked any better.

 

Bill Jepson