sr20 tach 12v

[2jz.s13]

So with the 89 240sx the tach wont wire with the coils. Will an aftermarket tach work or do i need to wire it directly to the ECU, or will i need a specific 12v aftermarket tach, or will I only be able to get it work correctly with an adapter?

[2jz.s13]

To the top.... Help please, I can't find a straight answer anywhere.

[sx moneypit]

FR Sport has a good write up on modifying your harness.Check them out.

[2jz.s13]

As in the website? I need a little more info then this but thanks for trying. Like a link, or something. I tried to find what you were taking about with no luck...

Doesn't anyone know if I can just use a aftermarket tach straight to the ECU or to the coils? Or anything? I mean hasn't someone used an aftermarket tach and not the 92-94 gauge cluster before??? Does anyone understand the basic layout of aftermarket tachs to know if I will have to get a special 12v one or are all compatible with 12v?

HELP!

[sx moneypit]

Go to marketplace,scroll down to FR Sport and click on,then scroll all the way down to the bottom of the page and you will see technical articles.

[2jz.s13]

Thanks man I appreciate it

Go to marketplace,scroll down to FR Sport and click on,then scroll all the way down to the bottom of the page and you will see technical articles.

I will keep the thread updated if it helps, and I will post an answer if I find one.

[sx moneypit]

No problem brother! I need to learn how post links and pictures just haven't had the time.

[2jz.s13]

haha I feel you. No need to waste time with pics, links are great.

This helps a little with the wiring cluster pictures, but no info on the tachometer set up at all :S. It mentioned what wire is the tach wire but nothing about the problem all SOHC 240sx swappers run into with the tach.

Unless anyone has any objections, I think I am just going to buy an aftermarket tach and try to wire it to the normal red/yellow tach wires, and if that doesn't work try to wire it directly to the ECU. If none of that works I will buy an adapter.

If anyone can help, please do! I don't want to waste money on an aftermarket tach if I don't have to.

[sx moneypit]

If you are running an SR20 why not just get a DOHC cluster or just swap the tach out?

[2jz.s13]

I am cheap.

If you are running an SR20 why not just get a DOHC cluster or just swap the tach out?

[sx moneypit]

In the 240sx tech articles they have a write up on how to convert the KA tach to read the KADE tach signal.The pictures are gone but the write up is still there.

[J14cm7]

Arent you guys just over thinking this? Cant you just find the ecu tach output and wire your tach to that?

[2jz.s13]

I think so.. I mean it is just a normal tach signal right? It's not a dumb variable voltage one like the KA24E is.......... I have no idea. It's over though, don't worry about it. Car is gone. Thanks for the help though.

[sx moneypit]

No problem brother!