So I have been working on modifying the tune on my S550/Whipple setup, and I have a question perhaps someone has ran across before myself.
So, with the Whipple flight controls, you can change the power/gear, octane adjust (PCM's ability to add in timing based on OAR), amongst other things. This is also built into the VCM scanner. Now, it APPEARS this is built or incorporated into the BCM as best I can tell, as you can make these changes with the engine running, and you get the typical BCM/Interior light flash like when you do an As-Built write.....
So I have experimented with this a bit.
I am trying to develop a system that allows me to have more control over the power, essentially to help dial the car to an index class (11.0/12.0/ect). Much easier to dial the power down I would think, sort of like a throttle stop. So, I went into driver demand and simply reduced the requested torque. It worked. Until I power cycled the ignition (assuming the PCM then queried the BCM for vehicle config data), and then no matter what the driver demand/launch tables were set at, it ignores them in the tune.....
So, wherever the Whipple software/flight control is writing, overrides what's in the actual tune on the PCM, for certain parameters it seems? It has revv limit controls, knock system on/off, and you can even add timing in small increments, in addition to an overall Octane adjust (limits KR system ability to add in timing based on knock).
It MIGHT make sense as to why most custom tunes require a full reflash, as this system seems to point the PCM to the BCM for certain changes.
really appreciate any insight into this!