[sanddrag]

On 968, over the years we experimentally determined that about 17 ft/sec is pretty much the upper limit for 4-CIMs playing most games on the standard size field. Anything over that and the acceleration just really seems to drop off (I base this on no math, but just what it felt like from a driver's perspective). In 2008 for Overdrive, we were geared up around 20 ft/sec, but it had the Fisher Price motors in there too. That thing was a real blast to go hauling around the oval track. If I recall, we were getting in the range of 8-second laps around the field. But, we had very well refined cornering code that let us carry the speed through a nice arc around the divider. When we pulled out the Fisher Price motors to use on another mechanism, it got noticeably slower. Also, we started burning out CIMs, even just in 2-minute matches.