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Date: Mon, 14 Mar 2005 09:16:43 -0500
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From: "Lorn H. Olsen" <lorn@dynacomm.ws>
Subject: Re: fine wire iridium plated sparkplugs

Walter,

The iridium spark plug gapping tool from Champion to adjust their own 
plugs is set to .024. If this is not the correct setting, why does the 
manufacturer's tool set the plugs to this gap?

By the way, I fly my O-320 with standard Slick 43xx mags (non 
pressurized) at 17,000 ft, without a miss. My Champion iridium spark 
plug gap is set with Champion's gap setting gauge to .024.

I am not trying to be a smart a... I have asked the Champion reps at 
Sun 'N Fun which of the 2 sizes on the gauge to use and they had no 
idea. I know that one is for platinum and one is for iridium. The size 
that is labeled "small" is, I believe, for the iridium and is set for 
.024. The second size is labeled "large" and is, I believe, for 
platinum plugs. This second size is set at .015.

Has anyone else out there ever tried to set their plugs with Champion 
gauges or do you all just know better than the factory? Where are the 
written specs from Champion?

Lorn

> From: "Walter and Margo Dodson" <wdodson@bak.rr.com>
>
> Do not adjust the factory gap beyond a check to see that all plugs 
> have the same gap!  Your (Slick) mags aren't up to a .024" gap if you 
> should loose the pressurized air supplied to the mags.  These are fine 
> magnetos and will serve you well as will the iridium plugs but don't 
> mess with factory settings!
> Walter Dodson 1895740 IA.
> ps: at .016" gap you need not pull the hard to reach top plugs each 
> 100 hr inspection as long as the rest look good.  Do those plugs every 
> 300 hrs when you clean your injectors in your ultrasonic cleaner.
--
Lorn H. 'Feathers' Olsen, MAA, DynaComm, Corp.
248-345-0500, mailto:lorn@dynacomm.ws
LNC2, O-320-D1F, 1,000 hrs, N31161, Y47, SE Michigan