Russell
Club Member
This is a guide to show how I converted my Current sensing tach to work with an ecu or other voltage sending ignitions that cars may have been converted to.
As a bit of background to start with, I am converting my 1975 260z 2+2 to 1JZ and although I have a thread running for that, there isn’t a huge amount of accurate info in the internet for how to achieve this.
The engine bay will look anything but standard but I want to keep the 70’s feel inside the car and the dials are a big part of that
I will do this in a few sections as I’m writing it on my phone.
I have used this setup so read through this first. If you are good at electronics it’s all you need, if you aren’t. Read on so you can see how it works in an S30.
http://www.dinoplex.org/tachoconversion/
It should be very similar for all years as we are replacing everything except the dial coil itself.
It would likely be possible to bring a broken tacho back to life as long as the coil is intact.
You can’t buy the circuit board directly. I found an online service that made them although they have a minimum qty of 10 so I now have 9 spares (8 when I have made Dans).
All of the components can be purchased on www.farnell.com
First step is to identify all of the components and where they need to go on the board, paying attention to polarities on capacitors and diodes specifically.
Then “tin” all of the pads. This involves adding a small amount of solder to each pad so that the solder will flow easily when heat is applied. These are sensitive components and a lot of heat will damage them.
When soldering, go slow and start from the middle. Don’t linger with the soldering iron or you will damage things.
This is a very small board so a bit of an eye test and not a job for shaky hands.
Snip the ends of the components and it should look something like this.
Sent from my iPhone using Tapatalk
As a bit of background to start with, I am converting my 1975 260z 2+2 to 1JZ and although I have a thread running for that, there isn’t a huge amount of accurate info in the internet for how to achieve this.
The engine bay will look anything but standard but I want to keep the 70’s feel inside the car and the dials are a big part of that
I will do this in a few sections as I’m writing it on my phone.
I have used this setup so read through this first. If you are good at electronics it’s all you need, if you aren’t. Read on so you can see how it works in an S30.
http://www.dinoplex.org/tachoconversion/
It should be very similar for all years as we are replacing everything except the dial coil itself.
It would likely be possible to bring a broken tacho back to life as long as the coil is intact.
You can’t buy the circuit board directly. I found an online service that made them although they have a minimum qty of 10 so I now have 9 spares (8 when I have made Dans).
All of the components can be purchased on www.farnell.com
First step is to identify all of the components and where they need to go on the board, paying attention to polarities on capacitors and diodes specifically.
Then “tin” all of the pads. This involves adding a small amount of solder to each pad so that the solder will flow easily when heat is applied. These are sensitive components and a lot of heat will damage them.
When soldering, go slow and start from the middle. Don’t linger with the soldering iron or you will damage things.
This is a very small board so a bit of an eye test and not a job for shaky hands.
Snip the ends of the components and it should look something like this.
Sent from my iPhone using Tapatalk