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Mark.tiree



Member Since: 03 Jun 2021
Location: Argyll
Posts: 29
Scotland 2006 Defender 110 Td5 CSW Masai Red
TD5 tacho install
Just about to fit the Discovery Cruise control kit from Empire to my 110 TD5 and I thought I might fit a tacho as it has the wiring already available in the kit. Will any tacho do? I notice the Durite ones have a 4/6/8 cylinder option via a switch on the back. Sadly not a 5 cylinder option. Any experts throw some light on this? Thanks 2004 TD5
2004 Discovery 3
Post #1020211 5th Jan 2024 1:07pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6605
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
Td5 has a 4 cyl type tachometer signal output.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1020212 5th Jan 2024 1:12pm
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1043
France 2002 Defender 110 Td5 DCPU Chawton White
Most will do as they just take any reasonable frequency signal to move the needle. Ideally you pick up from the ECU (neater) but you can take the sine signal from the alternator also. You can typically play with the dip switches at the back and a little pot meter inside (small screw driver) to calibrate. If you calibrate to idle (800rpm?) you get pretty close for what you normally use a tach (changing gears)

But it is possible the one you buy is out of range and you can't get it to work right. There is a risk. Take a Diesel one as it is more flexible and also the scale does not go too high as you don't have that many RPM to play with.
Post #1020214 5th Jan 2024 1:19pm
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Mark.tiree



Member Since: 03 Jun 2021
Location: Argyll
Posts: 29
Scotland 2006 Defender 110 Td5 CSW Masai Red
Thank you very much for the info. Fun Saturday coming up! I do quite a few miles in the Defender and the cruise control should make a big difference I hope. Tacho is also useful. Thanks again. 2004 TD5
2004 Discovery 3
Post #1020230 5th Jan 2024 3:55pm
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