sparkplug reading - Color Tune

[mike mager]

Programmer asked: (complete quotation below)

>Can a colortune be sensitive enough to read differences in runner lengths 
>on a regular intake manifold ??

Good call!

The instructions mention that you may need to compromise the mixture setting 
if there are distribution problems.  (So lets go port or direct injection!)

Mike


>From: "Programmer" <nwester at eidnet.org>
>Reply-To: diy_efi at diy-efi.org
>To: <diy_efi at diy-efi.org>
>Subject: Re: sparkplug reading - Color Tune
>Date: Thu, 16 Mar 2000 19:19:42 -0700
>
>Can a colortune be sensitive enough to read differences in runner lengths 
>on
>a regular intake manifold ?? Just curious...I'd think you'd need at least 4
>of em to do a V8--then set the other half carb.
>
>Lyndon.
>-----Original Message-----
>From: nacelp <nacelp at bright.net>
>To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
>Date: March 16, 2000 10:40 AM
>Subject: Re: sparkplug reading - Color Tune
>
>
> >
> >> 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.
> >
> >Ya, right, if your working on a dyno, or an idling engine.  Want to seat
> >under the hood while someone makes a pass at 110MPH?.   EGO, ya fine, ya
>got
> >$5K for a good one.  Can't use either in some catagoryies of racing.  
>Both
> >have there places, and lots of folks happen to be pretty good reading
>plugs.
> >Technology won't replace talent.  Using $$$$ equipment might be handy for 
>a
> >pro, and a crutch for the lessers, but experience can make up for either.
> >  It boils down to starting conservatively, and optimizing from there.
> >Yes, at times I use an ancient Color Tune for working on 1951 MG/TDs.  
>Just
> >seems right.....
> >
> >  I won't just automatically believe
> >> everything that I read, but his suggestion does at least pass a first
> >check
> >> of reasonableness.
> >
> >Not in my book
> >Grumpy
> >
> >> Mike
> >
> >
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