[Ether]

Here's pseudocode and sample contour maps for a 2-parameter tunable Arcade algorithm.

One parameter adjusts the strength of the turn at max throttle, the other adjusts the strength of the turn at zero throttle.

The left and right wheel speeds are smoothly interpolated for partial throttle so that the wheel speeds stay in the range -1 to +1 without the need for clipping.

Please note: The tunable algorithm attachment is near the bottom of the list¹:

http://www.chiefdelphi.com/media/papers/2661

¹As of 8/17/2012, that is. As new attachments are added, they are put at the bottom of the list. AFAIK, vBulletin provides no way to rearrange the attachments into a more sensible order