STACK ST8302 and ST8360 Video-Logger System
Chapter 4. Installation
User Guide
49
Engine Speed (RPM) Measurement
The engine speed (RPM) is measured by connecting the sensor harness
engine speed wire (labelled ‘ES’) directly to the vehicle ignition system.
Depending on the type of ignition system, the connection point varies.
Use the table below to find the correct connection point for your vehicle:
Ignition System
Connection Point
Coil and Points
Coil negative (Low tension)
HEI Systems
Coil negative (Low tension)
Magneto (internal or external)
Use HT pick up (ST697)
MSD Tachometer
output
Magneto CD (2-stroke)
Use HT pick up (ST697)
If none of these connections suit your vehicle, you can use the optional
Stack ST697 HT pick-up to get a signal from an ignition lead. Contact
your Stack distributor.
Standard Contact Breaker Ignition System
Connect the ‘ES’ wire of the harness to the negative contact breaker
terminal on the coil, as shown in Diagram 17.
Standard Electronic Ignition System
Connect the ‘ES’ wire of the harness to the electronic ignition of the
vehicle, as shown in Diagram 17.
