CamB Posted April 6, 2015 Report Share Posted April 6, 2015 Hi Perhaps to start with how I think that boost control by potentiometer works, as if I have this wrong most of what I have written below is useless: - connect potentiometer to provide 0-5V to AN Volt 4 (I will use 4 - I realise it can be any AN Volt input). Setup as a 0-5V input- set up boost target in closed loop at 0V through 5V (on Y axis) at desired boost levels- turning the potentiometer changes the target boost setting. If I've got this right, my idea for comment is below. My goal is to have position 1-3 on a rotary switch as low/mid/high boost on 98RON, with position 4-6 as low/mid/high boost on E85. I think I can do this with a single switch (and more importantly, a single input - I have a Storm): 1) I plan to use a rotary switch with a voltage divider, so that there are defined (known) steps to the boost target on the Y axis - eg position 1 is low boost (0V), position 2 is medium boost (1V), position 3 is high boost (2V), then... 2) have a Virtual Auxiliary Output which switches whenÂ AN Volt 4 is > a threshold (ie the midpoint - 2.5V) 3) switch to a second boost map using the Virtual Aux Output whenÂ AN Volt 4 > 2.5V, and repeat the table with position 4 / low (3V), position 5 / medium (4V), position 6 / high (5V). I'm not sure its critical to have this on two maps, but it feels ... tidier ... given the below 4) switch to the ignition map #2 and fuel map #2 for E85 when AN Volt 4 > 2.5V, using the Virtual Auxiliary OutputÂ Would this work? I have tried it in PC Link and it looks like I can make settings to accomplish the above. Note: I plan to measure the voltage output from the rotary switch - to be precise.Â Of course I'll need new injectors and to confirm my fuel system works with E85, etc etc, but I am more focused on the possibility of using the Virtual Auxiliary Outputs and defined steps on the switch as a way of creating a 'mode' switch. For example, I could have position 1 as low boost and no motorsport features. Supplementary dumb questions: a) I see fault settings under the analog inputs. It looks like a fault is triggered if 0V or >=5V is supplied into an AN Volt channel. Will this cause problems with my plan? Wiring up a 'normal' SPST toggle switch to a DI (eg to turn on logging), switching to ground, what should the settings be? Function = GP InputSwitch type = TogglePull up = ONOn Level = LowActive edge = [falling?]Â Quote Link to comment Share on other sites More sharing options...
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