McLaren and Red Bull Clash Over Throttle Regulations

Ever since the Spanish Grand Prix, FIA has investigated the matter of some teams using exhaust gasses when the driver is off the throttle to improve the downforce of their cars. Eventually, FIA ruled that throttle opening when the accelerator is released would be limited to 10%.
However, McLaren�s Martin Whitmarsh disputed on Friday before the British GP the new regulation, claiming that Red Bull�s Renault engine retains 50% of its power under a concession for reliability.