In my 360
I use Iridium
plugs with my Jeff Rose EI. They work great. Set to .035.
I wouldn't use car plugs in an
aviation engine. They don't work well.
I've seen the tips burns down
fast or the ceramic crack under the pressures.
One multiple failure I've seen
is on a friends very low time Legacy that has had 3 shorted coils on his LSI
system.
This was from the Denso auto
plug gaps getting larger from wear then eventually arcing inside the coil.
Another failure in a 360 I've
seen from auto plugs is the ceramic cracks under full power and completely burns
away the electrodes, damaging the cylinder.
Aviation plugs are made for
aviation use and can take the abuse. They last much longer and rarely fail. All
the Lancair's in my group stopped using auto plugs.
Uppers are Massives with a mag
and lowers are Iridium with an EI.
Randy
Stuart
LNC-2
----- Original Message -----
Sent: Friday, May 23, 2008 8:14 AM
Subject: [LML] Re: Electronic ignition
spark plugs
1.
Consistent large gap.
2.
Small electrodes that don't block the flame.
3.
Great spark exposure to F/A mix (see 2).
4.
Electrodes don't wear.
5.
Great endurance.
6.
Can you go wrong with a well designed moped plug? Nah!
7.
Cheap - merely US$ 11 per plug (I use Denso IK27 with my Light Speed
Eng.
EI).
SOLD!
Thanks Grayhawk
Cheers
Dom