Location of RPM sensor

[Coolbreezin]

Im wanting to replace my speedo/tach with separate units. I no longer use my EHC. Lights and points are rewired. Where is the RPM sensor on the engine? Any additional advice is welcome also. Thank you. (2005 Ridgeback, 117ci)

 

[MossBerg590]

The rps/tach is just a wire running from the ignition module to the tach

 

[BWG56]

Looks like the yellow wire is the tach wire

 

[Coolbreezin]

Thank you for the diagram. Big help. I see its B47, but my need is where is the sensor on the engine. My ehc is no longer used for anything.

 

[BWG56]

If its anything like a car and I believe it is, the lead should come off the coil. Years ago when I tuned up cars I would hook the dwell/tach meter to the hot on the coil and a ground, yes I said dwell, does anyone remember points in the distributor cap

 

[Coolbreezin]

Now that makes a lot of sense. Duh! Sometimes the obvious is always the hardest to see. Thank you again. Any recommendations on speedo or tach units? Im looking for simple, small and digital.

 

[BWG56]

 

[MossBerg590]

Yeah it is just a signal wire from the ignition coil straight to the tach.

 

[chubs]

If its anything like a car and I believe it is, the lead should come off the coil. Years ago when I tuned up cars I would hook the dwell/tach meter to the hot on the coil and a ground, yes I said dwell, does anyone remember points in the distributor cap

If I remember Chevy was 28* to 32* , we usually set em at 30* btc

 

[chubs]

If its anything like a car and I believe it is, the lead should come off the coil. Years ago when I tuned up cars I would hook the dwell/tach meter to the hot on the coil and a ground, yes I said dwell, does anyone remember points in the distributor cap

If I remember correctly, Chevy was set 28 to 32 degrees btc. we usually just went with 30 degrees btc. really miss that little "trap door" on the side of the cap, and that allen wrench for adjusting the points.

 

[Brew]

If your asking where the crank sensor is, it's located next to the oil filter on the front of the engine. If your facing the engine from the front it's to the right of the oil filter and is black in color. The crank sensor sends a signal to the ignition module which in turn sends the signal to your RPM indicator.

 

[BWG56]

If I remember correctly, Chevy was set 28 to 32 degrees btc. we usually just went with 30 degrees btc. really miss that little "trap door" on the side of the cap, and that allen wrench for adjusting the points.

That was the timing, dwell is different

 

[chubs]

That was the timing, dwell is different

Aw I think ya might be wrong ! Timing on chevy's is somewhere around 8 to 12 degrees btc. points were somewhere in the .018 range,( 28 to 32 degrees ) now ya got me wondering. Gonna have to look it up somewhere. Yer makin me work here man!
Been a while. I still have my old dwell / tach, and have no use for it other than to take up shelf space

 

[BWG56]

Aw I think ya might be wrong ! Timing on chevy's is somewhere around 8 to 12 degrees btc. points were somewhere in the .018 range,( 28 to 32 degrees ) now ya got me wondering. Gonna have to look it up somewhere. Yer makin me work here man!
Been a while. I still have my old dwell / tach, and have no use for it other than to take up shelf space

Same with mine

 

[francoblay1]

ufffffffffffffffffffffff.......... that was hard to read.... I am going back to bed!

 

[Coolbreezin]

Thank you all for yr input. I have a better understanding of what Im doing now.