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#F1 One team source tells me that today the FIA ruling changed from 10% throttle to 68%, which he says is 'close to full cold blowing' Adam Cooper - Twitter
FIA alters blown-diffuser ban to satisfy Renault
Friday 08th July 2011, 15:43
McLaren team principal Martin Whitmarsh claims the FIA has altered the off-throttle exhaust-blown diffuser ban to satisfy Renault and Red Bull. The ban, which took effect for the British Grand Prix, limits off-throttle blowing to just 10%, however according to Whitmarsh, the regulations changed on Friday after the aforementioned parties protested the ban.
"We learnt halfway through the session that Christian [Horner] hadn't lost as much as we had expected him too," he said during the FIA press conference.
"The rules are slightly fluid and seem to change by the hour at the moment, so we're still learning [how much downforce we've lost].
"It's not a criticism of Red Bull, they've got to get the best they can get out of the situation, but we were all a little surprised when we were told the regulations had been changed halfway through FP1.
"That puts us, and I'm sure many teams this weekend on the back-foot and we're trying to cope with that at the moment."
Whitmarsh and Horner got into quite a heated debate over the matter as the former looked to explain the change as he understands it.
"The expectation was that when you're off the throttle then the engine throttle would be closed, but there has been a negotation and as I understand Renault's throttles are 50% open under braking, that's probably not what most of us expected," explained Whitmarsh.
"It's been a bit of a revelation that we've gathered today."
As we understand it, the FIA has allowed Renault, and only Renault to run 50% throttle, whilst Mercedes has been allowed to continue 'fired overrun' which Horner suggested was equal to, if not more powerful than the 50% permitted to Renault. Renault cannot run 'fired overrun' for reliability issues which is why the FIA has allowed different regulations for different engines. Tony Fernandes, team principal of Team Lotus, described the situation as a 'shambles' and called for more black and white regulations.
FIA alters blown-diffuser ban to satisfy Renault
adamcooperf1
#F1 FIA press conference turning into heated Horner v Whitmarsh debate. Seconds away, round one!
Yep, Mercedes/Ferrari/Cosworth powered cars blowing at 10 %, Renault powered cars blowing at 50%+. This is massive advantage
Scifo zei:Ik blijf er bij. Regels veranderen tijdens het seizoen is gewoon NOT DONE! Zeker als die Renault wagen gebouwd is rondom de uitlaat.
Wtf, amai nog niet.Dillyracer zei:Dat is toch gewoon competitievervalsing?
Handsome Hermit zei:Ik heb vorige week nochtans nog met BBC Player 1.22 vlotjes heel de race gezien en ik kan daar nu toch ook een of ander feuilleton mee ontvangen live.


falc.be zei:ik wist niet dat Alonso ooit voor jagaur getest heeft
YouTube - ‪Alonso Test Jaguar 27-5- 2002‬‏
was toen echt nog wel een broekventje![]()
Scifo zei:Ik blijf er bij. Regels veranderen tijdens het seizoen is gewoon NOT DONE! Zeker als die Renault wagen gebouwd is rondom de uitlaat.
eniac zei:+1.
Ik begrijp simpelweg niet hoe je er als regulerend orgaan zo'n zootje van kan maken. Serieus, dat zouden toch allemaal piefen met verstand moeten zijn?
As we understand it, the FIA has allowed Renault, and only Renault to run 50% throttle, whilst Mercedes has been allowed to continue 'fired overrun' which Horner suggested was equal to, if not more powerful than the 50% permitted to Renault. Renault cannot run 'fired overrun' for reliability issues which is why the FIA has allowed different regulations for different engines. Tony Fernandes, team principal of Team Lotus, described the situation as a 'shambles' and called for more black and white regulations.

andrewbensonf1 Andrew Benson
A clearly angry Christian Horner is heading to talk to Charlie Whiting after decision not to allow Renault the concession they won on Friday
Horner refuses to comment. "I'm off to see Charlie now. I'm not going to say anything." #bbcf1
@tedkravitz Ted Kravitz
Renault's request for 50% exhaust blowing denied. Only allowed 10%. Mercedes allowed pre-agreed hot blowing. Possible Red Bull protest.