Ignition Dwell maps control how long the ignition coils are charged before the ignition spark is fired. 

Ignition Dwell usually only requires adjustment when making major performance modifications like a installing a turbocharger or supercharger. If you have decided to make changes to the ignition dwell maps, please ensure you make small changes and test them to minimize the risks of having a dwell time that is too short or too long.

More detailed information on the use of Ignition Dwell maps is available in our Woolich Professional Training Course.