This guide captures ‘bygone’ advice on how to use a Colourtune as part of the mixture setting process on a Classic Car. It is part of a series I am building that describes what to do on a Classic Car Basic Service.
Useful information for Classic Car and Retro Car enthusiasts, as many of these tasks are no longer required on modern day cars.
Remember folks these are ‘bygone guides’ … useful but the safety and personal protective equipment measures are reflective of bygone awareness. Stay safe.
What is a Colortune
A Colortune kit is a simple and accurate means of adjusting carburation. It consists of a glass-topped spark-plug through which the colour of the flame in the combustion chamber can be determined.
Basically a rich mixture burns with an orange flame, while a weak mixture is bright blue. The carburettor is adjusted in the normal way until the flame is brilliant blue speckled with orange.
The mixture in some recent carburettors cannot be altered so the flame will always be weak.
Below explains how to set the Colortune up.
How to set up a Colortune
Gunson Colortune Kits on eBay
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