QUOTE (RedBaron @ Mar 13 2010, 10:11)

Can someone please briefly explain this homologated stuff for me, I don't fully understand it all.
Homologation is a process is an approval process. It used to happen a lot in rallying: in order to be accepted as an entrant, a manufacturer had to make a certain number of road cars in the space of a year. During the time of Group A, I think this was set at 25,000. If the team wanted to make any major changes to the actual car - not the addition or subtraction of prupose-built racing parts - then they would have to make another quota of 25,000. This was a problem in the Group B era, because the homologation level was set to something like 2,000 models, and if teams wanted to make an update, then they only needed to change a certain percentage - something like 20% of the full number- do get changes approved.
The reason I'm saying this is because it's the best example of homologation there is. It essentially sets the basic model of the car in stone. In the context of Formula 1, certain parts of the car need to be homologated, including the survival cell. If a team wishes to make changes to any part that is homologated, then they need to undergo crash testing again, and the FIA will only allow changes on the basis of safety. The idea is to make it extraordinarily difficult for team to go changing certain parts of the car. You can see how homologation may be applied to other areas of the car, like the diffuser. It's clear the FIA wants to direct the development of cars by influencing what they can and cannot change, which is not necessarily a bad thing. I honeslty believe that parts like the diffuser should be a spec piece because a spec piece would make it easier to overtake.
However, I very much doubt that the so-called "snorkel" on the W01 is the same as McLaren's at all. The MP/4-25 specifically directs the airflow onto the rear wing through the shark fin, and the W01 is missing a fin of its own. Plus, they would have to plot a route through the car, which is not something they'd be able to do overnight and given that it runs trough the survival cell, they'd have to re-homologate the car.