Dwell
Ignition dwell is the time an ignition coil is switched on for before it creates a spark. Think of it as "coil charging up time". Dwell needs to be set for the specific ignition coils as it varies from coil to coil. An ignition coil upgrade will require the dwell to be adjusted. Low dwell can result in weak sparks and dwells set too long can result in coils overheating and burning out. The good news is that dwell settings can typically be researched and copied for the specific coils you are using. Just note that some settings will be shown in a 3D RPM vs battery voltage table in which case, some basic math will need to be done to convert those values to dwell time base and voltage correction.
Firing Order
How to correctly configure the firing order and ignition pins
Intake Air Temperature Ignition Correction
As the intake air temperature (IAT) on the vehicle goes up, the chance of knock occurring goes up, and nobody likes knock! So how do we make sure this doesn't happen, we use the IAT correction table to retard the ignition timing.
Ignition advance table
The ignition advance table is where the magic happens, the values in this table highly influence the engine torque. Set a cell too low and the engine will underperform, set it too high and you'll get to experience engine knock first hand or worse; rod knock. This table takes the RPM and MAP of the car and for each cell on the table has a set ignition value that will be output to the engine after having any additional corrections applied.
Ignition coolant correction
Similar to the CLT based RPM limit, one of the aims of this table is to stop you from overworking the engine when it's cold. AS the CLT increases in temperature, the amount of timing retard can be decreased up to zero at a reasonable temperature just below operating.
Ignition Cylinder Trim
Every cylinder on an engine will have differences in the temperature, shape and by extension, resistance to knock. FOME ECUs have the ability to detect which cylinder is knocking and the ignition cylinder trim tables allow you to put that data to some use.
Ignition Coil Testing
The ignition coil testing menu can be found under Ignition>Ignition Coil Test. The spark numbers correspond to the ignition output numbers and cylinder numbers provided that the firing order has been configured correctly.
Ignition Mode
The ignition mode can be configured differently depending on the type of ignition system on the vehicle. See ignition types for more information.