Anyone know how to get an Rpm signal

[Timken500]

My Friend has a DynoJet but does not have the optional Optical Pickup but was able to dyno his Powerstroke because he knew a place to pick up a signal using the primary pickup which uses a gas motors Coil signal it is the signal that tells the Coil when to fire. On a lot of Coil pack cars he pick up the signal from an Fuel Injector. Could we do the same with the My Dodge. Maybe pick up the signal from our injectors or maybe the crank sensor wire. Need something that fires a electrical signal once per Revolution. Any Ideas would be great thanks again you all are usualy a lot of help.

 

[robertyoke]

you should be able to pick up a signal off one of your injector wires with an inductor pickup. the injectors use a 100 volt signal to fire, but it may get confused with the multiple injector events per cycle.

you can still get hp reading just no torque reading.

-robert