Hi Guys,

I'm not sure this is the right forum for this but here goes.

I have a Zenoah GT-80 with C&H ignition installed in a H9 Cap 232 and it is giving me fits with EMI problems. I am getting 50 to 60% engine-on range and have tried nearly everthing I can think of to solve it.

Bill at C&H sent me a set of plug wire shields but that didn't help. The next step may be to send it back to C&H to have Bosch spark plug shields installed. I didn't do this initially because at the time they didn't have the short spark plugs and I would have had to cut the cowl. I understand they now have the shorter plugs. They said that shielded spark plug caps are rarely needed if all their precautions are followed and as far as I know, I followed them.

Before I do this I read an article in the Dec '02 RCM by Don Lowe about how he solved a stubborn EMI problem on a H9 Sukhoi by wrapping all the ignition components with metal tape. He doesn't say what kind of metal tape he used and I don't have his email address.

I have several questions. First, has anybody else had an EMI problem with the engine I described and second, what kind of metal tape should I use to wrap the ignition components like Don Lowe did. I tried wrapping every thing with aluminum foil but that didn't help.


Thanks for any help you can provide.

Bluesky