Hi Guys.

More and more people are running engines that demand more and more from their ignition system.

Most standard ignition systems are of the inductive type.  These ignition systems can generally handle up to 15PSI of boost pressure, sometimes a little more, sometimes a little less.  Gapping plugs down is not the best answer by any stretch of the imagination.  Reduced plug gap can lead to a rough idle and increased fuel consumption.

The next step above inductive ignition systems is Capacitor Discharge Ignition (CDI).

Within the CDI range, there are also different levels of CDI units available.  Some are made for road, some for race, and others are drag racing only.  It is important to use the most appropriate ignition system for your application.  So, if you are not sure, ask someone how knows.

Now, CDI systems do tend to emit a lot of radio frequency noise.  To reduce this noise (that can affect other electronic devices on the vehicle), you must use twisted pairs of wire for both the main power and ground wires, as well as the pairs of wires going to each ignition coil.  One step beyond twisted pairs is to use twisted shielded wire.

The ultimate version of twisted shielded wire is Tefzel (aircraft grade wire). When we build a custom loom for a customer we often use Tefzel wire when the customer wants the very best.  It doesn’t cost the earth, and the result is an outstanding loom.

That’s it for now.
PS: As you’ve just read, CDI ignition systems are at the top end of the ignition system tree.  If you think your ignition system might not be quite up to the task, drop us a line, as we may be able to point you in the right direction and offer some advice on wolfemail@wolfems.com.au.