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39wagon · 01-22-2017, 10:47 PM

I've been using a device called a Color-Tune to adjust my carbs for years. It was popular in the 70's or 80's and really helpful when tuning SU's on British engines. It is used in place of the regular spark plug and the top has a glass/pyrex area where you can see the color of the actual detonation. While it seems a lot less sophisticated than more modern exhaust gas analyzers, you can tell empirically what is really going on in the chamber and see carb adjustments results. I think they are still available. If interested, you might Google it.

01-22-2017, 10:47 PM	#11
39wagon Junior Member Join Date: Sep 2015 Posts: 21	Re: Visible flathead combustion I've been using a device called a Color-Tune to adjust my carbs for years. It was popular in the 70's or 80's and really helpful when tuning SU's on British engines. It is used in place of the regular spark plug and the top has a glass/pyrex area where you can see the color of the actual detonation. While it seems a lot less sophisticated than more modern exhaust gas analyzers, you can tell empirically what is really going on in the chamber and see carb adjustments results. I think they are still available. If interested, you might Google it.