hi
I am new to the megasquirt world. I have a ms2 v3 and need to know how I set up tacho output for my oem dash gauge.
what I know is that the gauge receives the signal from the ecu. My ignition is 4 cop wasted spark. I have an optical cam sensor similar to the nissans.
I have been looking around a lot and found that I have to make a circuit in the proto area but honestly I dont understand from where I take the signal to convert it for my gauge.
please help. thank you
tacho signal
Moderators: jsmcortina, muythaibxr
Re: tacho signal
If the dash gauge was originally powered from the car ECU, it should be simple to connect to MS. A problem arises when an older tach was fed from a single coil - that can need a special circuit built.
Rover SD1 3.5 EFI
MS2 V3
EDIS
Tech Edge O2
London UK.
MS2 V3
EDIS
Tech Edge O2
London UK.
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- Helpful MS/Extra'er
- Posts: 130
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- Location: Canberra, Australia
Re: tacho signal
If the older style tach running that used to run from a coil then one of these works https://www.autosportlabs.com/product/tach-adapter/
I built one using this circuit from that website for a V8 - drop off one cell for a 6 cylinder and two cells for a 4.
I built one using this circuit from that website for a V8 - drop off one cell for a 6 cylinder and two cells for a 4.