| wstar |
06-17-2013 01:20 PM |
Well, it's tricky to even describe what we're talking about without 3-D models :)
The only real "problem" in the stock map is that the virtual throttle refuses to open fully at low RPMs even when you stomp the pedal to the floor. I think all of our maps attempt to address this to some greater or lesser degree. I don't think that's contrary to my upcoming goals. I still want a fully-depressed pedal to give me full throttle regardless of engine revs.
Separately, there's the issue of the *shape* of the curve as you roll through 0->full on the throttle pedal. What we see in UpRev's rows is the theoretical shape of that curve if engine RPM stayed constant as you pushed through the pedal, but in reality while driving the car you're always taking a diagonal line through the table (because the engine is revving up as you're pressing the pedal down further). Alternatively, what we see in UpRev's columns of data is what happens if you maintain a constant pedal position which accelerates all the way to redline (although for most shallow pedal positions in reasonable gears, the engine will stop accelerating before it reaches the redline, unless you give more pedal moving to a different column).
Or something like that.
My Curve2300 graph gave the full throttle value at low RPMs (or seems to for me anyways, but you're saying yours does a better job) and for the shape part I just made it a smooth curve that pushes out to the upper left in the middle a bit, when viewed across a single row of data (but the rows are fairly well matched).
What I want to shoot for now is the opposite curve shape: having the curve dented inwards in the middle. Basically this makes the lower 1/2 of the pedal intentionally not-touchy, so that you have better fine control of near-neutral throttle in corners. As a result you lose some sensitivity in the upper part - once you get past a certain point it's going to ramp out to full throttle fairly quickly.
In general though, this is all just a feel thing. You can change the shape of these curves just as easily by modifying how you work your foot instead of modifying the throttle table itself. Want touchy? Push your foot down faster. Want smooth? Move your foot slower. But given our throttle is digital and very touchy in the low range as it is, I'd rather mechanically slow it down in that low range so that my foot has a little more room for error when trying to find pedal sweet spots for traction when transitioning back off the brakes.
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