This is an (as usual) excellent article from Andrew Benson (the dude who asked the question that started the argument):
http://www.bbc.co.uk/blogs/andrewbenson ... s_lat.htmlQuite simply, the FIA have been lenient, engine manufactures have claimed they have to have some (off throttle) blowing (hot in the case of Mercedes, cold in the case of Renault) for reliability purposes, so blowing gases hasn't gone away.
Renault have argued (Benson also states this as fact) that their cold blowing system, is worth
less that the hot blowing system, so for it to be fair, Renault should be allowed a greater percentage of throttle opening (when under braking) compared to the amount allowed for Mercedes in order to equalise the claimed advantage to Mercedes.
Whitmarsh is insisting this is unfair, that the 50% of off throttle that Renault can use for blowing is too much (and just plain against the new interpretation of the rules), and gives them an advantage. He says because of the constraints on hot blowing (firing) the benefits of that are greatly limited. Horner disagrees, and argues that the benefits of firing are significantly more than the system for Renault unless the Renault has the 50% allocation.
I think the FIA's position is clear, the engines should be essentially equal, so what it depends on is if they have got a level playing field by allowing the cold blowing Renault the 50% off throttle overun. That's the principle they're trying to uphold, this isn't about having rules that are the same for everyone, its about making sure the
effect of the rules is the same for everyone.
In the short term, thats what they need to rule on, in the long term, we should discuss the principle of having equalised engines.