Stock RX-7 plugs NGK brand (BUR 7EQ lead, BUR 9EQ trail)  has worked well
for me.  I get around 250 hrs on auto fuel,  100 or less when I burn 100LL
avgas.  Ed can give a better idea on 100% avgas use, I use a combination of
both but mostly auto fuel.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

I can't get much more than 50 hours out of 7EQ leading plugs
and autofuel.

Must have something to do with EC2 vs. stock Mazda ECU.

I'm now running BUR 9EQP leading and trailing, so will
let you know how those work out.
--
Perry Mick
Duckt N7XR
http://www.ductedfan.com

 
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