F1Fanatic has a guest article up discussing the
impending diffuser wars.
That teams can run a central section at all is of some contention. However a close reading of the rules suggests that a 150mm central section extending beyond the main diffuser is permissible. [...] The theory is simple. By increasing the overall volume of the diffuser air can be slowed in a more controlled fashion which reduces the odds of flow separation. I find it hard to believe that the FIA will outlaw this central tunnel as it is a fair interpretation of the rules.
