<< If you need a hotter plug to burn aircraft fuel (on occasion) but hotter
 > plugs don't hold up, what about using an Iridium plug such as the
 > ngk-BPR7EIX?
 >
 > Del Johnson
  >>

Anyone would know better than me what to do. I have no experience with those.

The Champion N-80 and N-82 were good choices for racing. You might find a
cross for those. I think the N-86 was the hotter version.

I got some AC plugs that Paul Yaw was trying. I will look through the pile
and give you that number. They were cheap and ran well.

Plug heat ranges are for all around driving. Flying is like hammering across
Nevada in the summer. I don't see even a cold plug fouling out unless leaded
fuel is a factor. I race on 93 octane pump gas. more octane is loosing power
and raising EGTs to no good end. If you get no cracks in the chrome radiating
from the plug holes, then the hotter plugs are not a factor and you are home
free.

Lynn E. Hanover

 
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