To limit power, all forced induction cars were fitted with a 34 mm diameter air restrictor before the turbocharger inlet, limiting the air flow to about 10 cubic meters per minute. The restriction was intended to limit power output to 300 hp although some WRC engines were believed to produce around 330–340 hp. Engine development did not focus on peak power output but towards producing a very wide powerband (or power curve). Typically, power output in excess of 300 hp was available from 3000 rpm to the 7500 rpm maximum, with a peak of 330–340 hp at around 5500 rpm. At 2000 rpm (the engine idle speed in "stage" mode) power output was slightly above 200 hp.
A Fatal Accident Inquiry into the incident concluded, on 6 September 2011, that McRae was at fault for the avoidable helicopter crash that led to his death and the death of his passengers. Sheriff Nikola Stewart stated, after the 16-day inquiry, that McRae had been engaged in "unnecessary and unsafe" low-level flying at the time of the crash.
Following his win at the Brands Hatch meeting of the 2007 World Touring Car Championship season, Andy Priaulx dedicated it to McRae, commenting that his death "shows how fragile life can be". McRae's former rival, four-time World Rally Champion Tommi Mäkinen commented the helicopter accident as terrifying news, and described McRae as "a pleasant fellow and a tough rival". Valentino Rossi, who was taught the basics of driving a rally car by McRae, said he was shocked and saddened by the sudden departure of the former World Rally Champion. Valentino dedicated his win at Estoril MotoGp in 2007 to Colin McRae saying to the media "I want to dedicate this to Colin McRae. He was one of my big idols when I was very young and it's because of him I have a big passion for rally".
In an attempt to cut costs, since 2006 new regulations required mechanical front and rear differentials, while the central differential remained active. Active suspension and water injections were also prohibited. Cars entered by a manufacturer had to be equipped with the same engine for two rallies; further limitations were imposed on the changing of some parts, including suspension, steering, turbochargers and gearboxes.
When the Porsche 959 arrived at 195mph in 1986, it was by far the most technically advanced, the fastest and most capable hypercar ever conceived. So try and get your head around this: it was originally designed as a Group B rally car, with the road cars only being necessary for homologation purposes. That’s like a McLaren P1 or 918 Spyder taking on the 1000 Lakes… Absolute madness.
In the Paris–Madrid race of May 1903, the Mors of Fernand Gabriel [fr] took just under five and a quarter hours for the 550 km (340 mi) to Bordeaux, an average of 105 km/h (65.3 mph). Speeds had now far outstripped the safe limits of dusty highways thronged with spectators and open to other traffic, people and animals; there were numerous crashes, many injuries and eight deaths. The French government stopped the race and banned this style of event. From then on, racing in Europe (apart from Italy) would be on closed circuits, initially on long loops of public highway and then, in 1907, on the first purpose-built track, England's Brooklands. Racing was going its own separate way.
A1GP ADAC Formel Masters Auto GP Barber Pro Formula Abarth FA1 Formula Alfa Formula Asia Formula BMW FC Euro Series Formula König Formula LGB Swift Hyundai Formula Lightning Formula Maruti Formula Masters China Russia Formula Nissan 3.5L Formula Opel/Vauxhall Formula Palmer Audi Formula RUS Formula Rolon Formula SCCA Grand Prix Masters GP2 GP3 International Formula Master Superleague Formula World Series Formula V8 3.5
The quest for longer and tougher events saw the re-establishment of the intercontinental rallies beginning with the London–Sydney Marathon held in 1968. The rally trekked across Europe, the Middle-East and the sub-continent before boarding a ship in Bombay to arrive in Fremantle eight days later before the final push across Australia to Sydney. The huge success of this event saw the creation of the World Cup Rallies, linked to Association Football's FIFA World Cup. The first was the 1970 London to Mexico World Cup Rally which saw competitors travel from London eastwards across to Bulgaria before turning westwards on a more southerly route before boarding a ship in Lisbon. Disembarking in Rio de Janeiro the route travelled southward into Argentina before turning northwards along the western coast of South America before arriving in Mexico City.