Quote:
Originally Posted by wlfpck
Think pedal position and the amount the throttle body is open.
With the standard cable throttle, it is all mechanical. If you graph the pedal position versus the amount the throttle body is open, you'll get a linear curve. For instance, pedal fully down is 100% open. Pedal half down is 50% open. (Could actually be different but that's the simplified idea).
Now if you take drive by wire (dbw) and graph it out, for most cars, you'll get curve that fits better to an exponential curve or some polynomial curve.
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That's not the issue. The question is what does it mean for the throttle to be 50% open? If you say it means the throttle is at a 45 degree angle, what does that tell you? Nothing at all useful.
From my experience, the actual throttle mapping with ethrottles is better for actual driving because you get much more resolution with the softened low end response, whereas the lightest tap of the throttle gives you a huge jolt with cable throttle.