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julian Member Since: 17 Feb 2017 Location: Devon Posts: 194 ![]() ![]() ![]() |
I've got a cheap 52mm eBay one on mine.
Runs off the w terminal. Looks in keeping with the other gauges (white led, not green though) You have to calibrate them using a tacho, or just roughly by experience. They're about £25 ish, iirc. |
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el sid Member Since: 06 Sep 2025 Location: devon Posts: 4 ![]() ![]() ![]() |
Ive seen some where that you set them at tickover revs ie 750 to 800,is that what you mean?
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julian Member Since: 17 Feb 2017 Location: Devon Posts: 194 ![]() ![]() ![]() |
Out of the box, they "know" that "zero" pulses from the w terminal is 0rpm.
But, say you rev to 1000rpm - some setups will put out more pulses than others at that engine speed. So you need to take it to a know rpm (doesn't really matter what that is, so long as you know it) and then dial the gauge to that rpm. Then it will know that zero pulses means 0rpm and whatever it gets when you told it 1000rpm is 1000rpm, and, from that, it can, more or less, scale all the other values. |
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Hazza Member Since: 10 Jan 2011 Location: North Yorkshire / Leeds Posts: 237 ![]() ![]() ![]() |
Most of the cheap ones can be prized apart, then you can put a dab of green glass paint on the LEDs to change the colour. Someone more skilled could probably change the LEDs to green! 1990 Defender 110 200TDI Camper - now converted to Td5 power
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el sid Member Since: 06 Sep 2025 Location: devon Posts: 4 ![]() ![]() ![]() |
THANKS, THATS MADE IT MORE CLEAR ON HOW THEY WORK. |
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