I can't find anything colder than the NGK BUR9EQ spark plugs. THese  are
meant for the trailing plugs, but I don't see any reason you couldn't
use them in the leading also. NAyone know if there are any colder  plugs
than these? I'll look and see if they make these in platinum  electrode.

Brian Trubee

Lynn Hanover recommended Autolite AR2592 racing plugs for all four
positions. I want to Autozone as he recommended and almost fell over
when they asked over $62 for four plugs and I had to wait 4-5 days.
So I went on line and bought 4 including shipping for about $13 at
www.sparkplugs.com
Today I flew the CZ to Ft Pierce FL and back to FXE Ft Lauderdale as
part of my test period. I had installed wide band O2 sensor with dual
display and I had a better idea where my mixture was. No problems
with the engine, Ivo prop  or the plane. Found out that my temps run
20 higher with nose
gear down :)
I have to put a PP on this plane. Would like to see a climb rates.
It runs cool in the air, but if I have lots of planes infront of me
for takeoff, my temps creep to 200F + and there is not much room left
for takeoff.
Because of that my irrigation system is half done. I need a
windshield washer tank with pump.
Buly


Darn, now I have to find a heat range chart for Autolite. Why
can't these people work together? :) What works in a race car may
or may not work in an airplane. Keep and eye on those plugs with
frequent inspection.