From GMM
As the blown exhaust row between Red Bull and McLaren subsided late on Friday, the latter team was already working hard to catch up with the ever-changing rules.
GP2 driver Oliver Turvey was in McLaren's Woking driver simulator after it emerged the Renault teams - including dominant Red Bull - had been allowed by the FIA to use 50 per cent throttle under braking.
Earlier, the FIA intended to limit off-throttle engine blowing to 10 per cent, but the Renault teams argued that they need at least 50 per cent on reliability grounds.
It also emerges that Mercedes have been allowed to use 20 per cent throttle, based on the engine maps of the pre-exhaust blowing era in 2009.
Team boss Christian Horner praised the FIA's Charlie Whiting on Friday as he clashed with his McLaren counterpart Martin Whitmarsh, when it emerged that Renault-powered teams had been allowed an exception to the 10pc clampdown.
But Red Bull figures were furious ahead of qualifying after the controversial 50 per cent concession for their exhaust blowing solution was withdrawn.
It was Whitmarsh who was smirking on the Silverstone pitwall a day later, with Horner and Adrian Newey storming out of a meeting with Whiting in the wake of a further technical directive issued shortly before Saturday practice.
"I'm not going to say anything," Horner told BBC Sport.
As the blown exhaust row between Red Bull and McLaren subsided late on Friday, the latter team was already working hard to catch up with the ever-changing rules.
GP2 driver Oliver Turvey was in McLaren's Woking driver simulator after it emerged the Renault teams - including dominant Red Bull - had been allowed by the FIA to use 50 per cent throttle under braking.
Earlier, the FIA intended to limit off-throttle engine blowing to 10 per cent, but the Renault teams argued that they need at least 50 per cent on reliability grounds.
It also emerges that Mercedes have been allowed to use 20 per cent throttle, based on the engine maps of the pre-exhaust blowing era in 2009.
Team boss Christian Horner praised the FIA's Charlie Whiting on Friday as he clashed with his McLaren counterpart Martin Whitmarsh, when it emerged that Renault-powered teams had been allowed an exception to the 10pc clampdown.
But Red Bull figures were furious ahead of qualifying after the controversial 50 per cent concession for their exhaust blowing solution was withdrawn.
It was Whitmarsh who was smirking on the Silverstone pitwall a day later, with Horner and Adrian Newey storming out of a meeting with Whiting in the wake of a further technical directive issued shortly before Saturday practice.
"I'm not going to say anything," Horner told BBC Sport.