sparkplug reading - Color Tune

[Shannen Durphey]

Spark plug with a "window".  I have one.  It's not for high rpm use,
or sustained loads, or high temp stuff.  Reach and heat range never
actually match the plug you're replacing.  But the idea is to watch
the flame color to tune a carb.  It's fun, and it can work at times. 
Really neat to use on efi, watch flame color go from yellow to blue as
the ecm cycles lean to rich.  Eastwood Co. sells 'em.  They're on the
web.
Shannen

Carl Summers wrote:
> 
> Hi, Whats a Color Tune???
> -Carl Summers
> 
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> -----Original Message-----
> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of mike mager
> Sent: Thursday, March 16, 2000 9:21 AM
> To: diy_efi at diy-efi.org
> Subject: sparkplug reading - Color Tune
> 
> The "New Color Tune" is here!
> 
> I was greatly relieved to find that TRF (The Roadster Factory) had the Color
> Tune in stock (not out of production);  I got mine (with no shipping delay!)
> for about 50USD.
> 
> Do any of you have experience with Color Tune?  David Vizard says that
> sparkplug reading is a very unreliable way of setting mixture strength;  he
> likes to use an EGO and a Color Tune.  I won't just automatically believe
> everything that I read, but his suggestion does at least pass a first check
> of reasonableness.
> 
> Mike
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