Why calibrate ignition coil dwell? I am using a distributor based ignition for my EFI build and ignition coil dwell calibration will help optimise various performance aspects. A limitation of using a distributor on a 6 cylinder is as RPMs climb the time between spark events reduces. This reduces that available time for the ignition […]
These days injector behaviour at different voltages is well understood. The speed of opening and amount of fuel delivered vary with voltage. Corrections are made in fuelling calculations to account different performance for differnt voltages at the injector. If what the Megasquirt ECU understands is the voltage at the injector is different in reality, then it is likely fuelling calculations will be incorrect. This is why the battery voltage calibration needs to be correct in your Megasquirt ECU.
The ITB idle air control conundrum Idle air control is generally a challenge with individual throttle bodies. This is from the sensitivity of throttle position to airflow at low rpm. An idle air control strategy controlled by the ECU can work but requires a large investment of time and knowledge to tune properly. In the […]