Eco Mechanics Races
The Eco Mechanics Races are a proposed set of races created by the Eco Mechanics. The races created by the Eco Mechanics (EM) are intented as a mere pretext to get people intrested in car tuning/learning things about modifying the engine and to help create a community of green engineers. In fact, the engineers can immediatelly become open source ecology (OSE) members, since there is such a large amount of overlap (the only difference being that the EM members focus more specifically on transportation technology.
Overview of the Eco Mechanics
The things eco mechanics can learn about car tuning/modifying the engine include i.e. running on different (low or zero polluting) fuels -i.e. ethanol, methanol, methane, nitrous oxide, ...- by either modifying the carburettor or integrating custom ECU's with fuel injectors on 4-stroke gasoline engines they could use (like the Honda GX200 to 400 series, Tecumseh, EcoMoto, Kohler, Robin, Briggs & Stratton, Yamaha, TKM, Aixro, VT250 from Swissauto (or Tech F-1, Suter Vampire, Biland, Oral, GM) ).
Also, they can learn about using straight vegetable oil (SVO) kits on diesel engines they might use, and finally, they can also learn about how to modify their mufflers to silence them more effectively.
In addition to organising microcar races, minibike races too can be organised (on pocketbike racing tracks). Due to their small weight, minibikes and pitbikes can be made to run on compressed air. See also this blow-up schematic. Similar to the mini moke design, the minibike can be created on a chassis of a particular type of bike, and it can also be made sure it's road-legal (so it can be driven to the track). Perhaps the most ideal minibike to base it on could be either the Honda Dax or Honda Monkey (due to their low cost, wide availability, and presence of many clones).