Reply To: Installing a tacho gauge

I also have a 6v and when setting up the tick-over speed I used a small electronic rev-counter I bought some years ago. I got it as a spare when I had trouble after an engine rebuild on another 12v car. It is a modern one but like most modern ones, it does have the facility to switch between 4, 6 and 8 cylinder engines. It has four wires – one is attached to the negative side of the coil(green), one to the positive(red), one to earth(black) and of course there is a wire for light. I just ‘jury rigged’ it in the engine compartment, temporarily. It worked perfectly and gave me a nice steady rpm reading while I adjusted the idle speed. I am toying with fitting it permanently but thought I would mount it on a swing bracket so I can tuck it away out of sight when not in use.

It is made by TIM – model TIM/014(B) – 52mm diameter. and of course comes with fitting instructions. From memory it was about £25

Here it is on good old Amazon – but currently unavailable. https://www.amazon.co.uk/Time-Instruments-TIM-014-Tacho-52mm/dp/B0049MPU1E

One word of caution though, if you have electronic ignition fitted you may have a problem if you fit an electronic rev counter. On another car the rev counter interfered with the amplifier on the electronic ignition causing overheating of the coil among other things, this in turn led to misfiring and cutting out.

Hope this helps