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Chapter 2: Hardware Installation
Hardware Mounting (cont.)
Mounting the Electronic Control Unit
Strong vibration may also destroy the sensor and control unit (as with all electronics) so it is important to consider
mounting arrangements carefully.
NOTE: Engines with CDI ignitions, especially in conjunction with copper core spark plug leads and non-resistive spark
plugs can generate large electrical interference for all electronics including PC’s. It is very important to apply the
following mounting and cable routing suggestions to avoid any problems!
It is very important to keep the PC, DYNertia3 and it’s cabling well away from large sources such as ignition systems-
1) Mount the sensor unit at the furthest distance (‘every inch counts’!) from the engine as possible. Route all cables
as far as possible away from the engine (and any electric motors such as cooling fans) and keep the controller and PC
at a distance. Coil any spare cable up neatly at the PC. Keep the sensors lead away from the USB lead or any other
wiring.
It’s best to route cables inside a protective metal tubing or keep separated from the engine by mounting behind the
earthed metal of the dyno frame or shields. Secure at the DYNertia3 control unit to prevent movement of the cables.
DYNertia3 software can even be operated by remote control if required (wireless keyboard or a PC ‘page turner’ as one
option), tests can be started and stopped and new files even created (names incremented).
2) Always use resistive Spark plugs and suppressed Spark plug leads to prevent interference (at least during testing).
Tip- A suppressed spark plug lead from a car can be put in series with the existing spark plug to reduce interference.
This additional spark lead is essential on many go-kart engines as they have particularly ‘noisy’ ignition systems!
3) Follow the wiring advice in the “Inputs- Using” chapter on wiring if measuring from additional sensors.
Secure any leads close to the DYNertia3 control box. The aim is so that the leads are
completely prevented from movement, as this will place stress on the connectors and
wiring.
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