Bill,

I am not a spark plug expert but all fine wire plugs went through the platinum stage and then on to iridium. If you get the Champion fine wire gap gauge, you will see that platinum plugs gap at .015" and iridiums gap at .024". Why? I don't know for sure but I have to guess that there must be less resistance in the iridium. The larger gap also should lighting the fire better. The post that sticks out to gap to the center post has a smaller diameter on the iridium plugs.

Lorn

> From: "Bill Wade" <super_chipmunk@roadrunner.com>
> Date: February 7, 2012 4:18:37 PM EST
>
> What's the problem with platinum? I'm running fine wires in both my IO-550 and TCM IO-360.
>
> I haven't noticed any problems after 300+ hours on each one. -Bill Wade

--
Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, Inst
DynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us
LNC2, FB90/92, O-320-D1F, 1,800 hrs, N31161, Y47, SE Michigan