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Tacho wiring with Standalone unit ??


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#1 kubus

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Posted 28 February 2017 - 11:01 AM

hi there guys -..... going stand alone on my 260z - with L28et

and would love to have the stock tacho working ...

any links to how it should be done ??

 

many thanks guys.



#2 cgsheen

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Posted 28 February 2017 - 11:26 AM

Still using a single coil for spark?  

 

No one is going to know the answer to your question without knowing the particulars of your "standalone".  

 

The 260Z Tach works off the "pulse" that causes the coil to fire (you'll notice that the blue "tach signal" wire is connected to the "-" coil post and the output of the electronic ignition module through an inline resistor in the stock configuration).


1974 "Early" 260Z: '83 L28ET - F31 ECU MAF Coil TPS - T04E - FMIC - 400cc Injectors - MTX-L wideband - NIStune enabled! - '83 5 speed - coilovers - Big Brakes up front - Sakura Garage, Tempe, AZ


#3 JSM

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Posted 28 February 2017 - 03:55 PM

You can use this link as a reference. Green is switched positive, black is ground and the red goes to - side of coil with a resistor. I happened to have a resistor from a ZX I just pulled. Now your 260z tach may be different, but you could always source a 280z tach.

http://www.zcar.com/...html#post767501

I just did this for a tach I sold:
https://youtu.be/B3-KYS74FF0
1971 240z
1980 280zx
1988 300zxt

#4 kubus

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Posted 28 February 2017 - 11:12 PM

ok - my bad...

 

the car is fully rewired / new standalone EMU ( same as hal tech / megasquirt ).

coil on plug setup.



#5 JSM

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Posted 01 March 2017 - 04:54 AM

You have to dig in the FSM and see how the 260z tach is wired. If it is the same you can hook it up like I showed you above. You'll need a reference I would think from the ECU for the tach signal.
1971 240z
1980 280zx
1988 300zxt




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