MoTeC Global Forum

Hi

Today's weird question...

Is there any way to get the idle speed to increase if battery volts drops below a certain level?

The best I have come up with is a "fake" air con input from a PDM or CDL (if battery volts < xV then turn on "air con", and then use the aircon increase idle parameter).


The reason for this is the car has a "race" alternator that cuts in at pretty high RPM (and I can't change the gearing because of the alternators upper RPM) and I can't fit a more sensible alternator (chassis/water pump outlet/dry sump pump/wishbones/driveshaft etc in the way!).


Thanks in advance.

Using a standard GPR package, the way that you have mentioned is probably the only way I could think of doing it too.

You would need to write a custom package to have voltage directly affect the idle aim.

Hi,

I have added this into the feature requests for future updates to the GP Packages. I can't guarantee that it will make the cut, but it's been asked for.

Thanks guys. I'll keep an eye out out for a feature upgrade.

In the meantime...one virtual aircon install coming up!

If you aren't already using alternator control, you could wire the output of that into an input, then use that input as the Aux Output 5 Channel Resource. Then use that output as the input to the Air Condition Request. It wastes a few IO pins, but allows you to do it 100% in the M1 instead of needing an external device.

aNinjaneer wrote:If you aren't already using alternator control, you could wire the output of that into an input, then use that input as the Aux Output 5 Channel Resource. Then use that output as the input to the Air Condition Request. It wastes a few IO pins, but allows you to do it 100% in the M1 instead of needing an external device.

Thanks, I'll keep that method in mind.