<<  I use the racing plugs NGKR6725-115. Find a cold or similar plug

on

a heat

 > range chart. Run as cold a plug as will remain clean in your

engine.

 >
 > These are retracted gap. Very cold heat range, wire electrode. I

use

the

same
 > plug all year.
 >
 > Many dirt bikes have to run very cold plugs, and those cost far

less

than

the
 > nucs at $25.00 each.
 >
 > Lynn E. Hanover
 >
 > Loss of electrode material would suggest too hot a heat range.

I should have added that I have no aircraft application. This is

information

developed from years of racing the rotary. A hotter plug may run

longer

without fouling should you be forced to use aircraft fuel.

Lynn E. Hanover

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

After I posted this a web search came up with several hits with the key
words 'Mazda', 'Rotary', 'Iridium' including information that the RX8 now
comes with iridium spark plugs.  Paul, can you check on and report the make
& model of the spark plugs in the RX8

Thanks.

Del

I know they are iridium and I know they cost $50 each.

Here it is in the Mazda RX8 2004 Service Highlights manual I bought at
7 Stock. Page 01-18-3 NGK RE7A-L leading standard equipment. RE6A-L Hot type plug.
RE9B-T trailing.

Paul Lamar
 
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