RB20 Tachometer signal?RPM

[cheewin88]

guys....i just bought a RPM meter wanna install to my car...
i'm using BMW e28 + rb20DET
where can i get the RPM signal?
izzit from ECU?the 7th wire?Tacho signal?
i tried but failed....can't...
i tot my RPM meter spoil...but my frenz's borrow me a RPM meter also can't....
so where else i can get the RPM signal?

 

[Force Performance]

Digital 2 analog converter 4 old tach mtr.

:cool: U have 2 convert d digi pulse from d RB ECU 2 drive ur old E28 analog tacho.

:cool: Pl. utilize d PS-PowerSport Impulse Tacho Adaptor can solve tis problem. d gadget can be get from Andy of Dragger Racing, Alan of Exodus Motorsports or Ah Wah of RS Motorsports.

 

[cheewin88]

:cool: U have 2 convert d digi pulse from d RB ECU 2 drive ur old E28 analog tacho.

:cool: Pl. utilize d PS-PowerSport Impulse Tacho Adaptor can solve tis problem. d gadget can be get from Andy of Dragger Racing, Alan of Exodus Motorsports or Ah Wah of RS Motorsports.

i means i just bought a new tacho meter....
wanna install it....but dunno where to get the wire...
i'm just a newbie in car world....
can u let me noe more about the PS-PowerSport Impulse Tacho Adaptor?
and may i noe where is dragger racing,exodus motorsport or rs motorsports....dun too expensive...hehe...still student...

 

[RSI]

For Nissan ECUs the Crank angle 120 deg signal= RPM signal. That wire can be traced from the sensor which is connected to the CAMshaft.

 

[RSI]

What you can do is connect the RPM meter. Connect the +12V wire and the Ground wire. It should be red and black. Then start your engine. Connect the RPM signal wire from the tacho to a needle. While the engine is idling, poke the needle onto each wire from the cam sensor (distributor looking thing) until you get a correct RPM reading. Mark that wire, off your engine and then permanently splice into that wire. Viola, you have found the RPM signal wire!

 

[cheewin88]

eh.......can anyone make me a diagram?
where is the the cam sensor at?
sorry....noob here

 

[RSI]

The cam sensor on RB engines is on the cylinder head, looks like a distributor. That whole bunch of wires... one of them wil be your tacho signal.

 

[Force Performance]

The cam sensor on RB engines is on the cylinder head, looks like a distributor. That whole bunch of wires... one of them wil be your tacho signal.

:cool: Y so troublesome! If u have d correct tach meter, just splice d wire 2 d ECU tach output only.