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.
Designed by Colin McRae and Dave Plant and built by DJM Race Preparation, the McRae R4's chassis is based on a steel safety cage with carbon panelling front and rear, and a steel-covered cockpit area. Suspension consists of twin wishbones with Proflex dampers. The body styling has been done by Keith Burden and Tom Webster. It appears that some components of the vehicle have been taken from existing production cars, the doorline in particular appears very close to that of the Ford Ka.
In Germany, the Herkomer Trophy was first held in 1905, and again in 1906. This challenging five-day event attracted over 100 entrants to tackle its 1,000 km (620 mi) road section, a hillclimb and a speed trial, but sadly it was marred by poor organisation and confusing regulations. One participant had been Prince Henry of Austria, who was inspired to do better, so he enlisted the aid of the Imperial Automobile Club of Germany to create the first Prinz Heinrich Fahrt (Prince Henry Trial) in 1908. Another trial was held in 1910. These were very successful, attracting top drivers and works cars from major teams – several manufacturers added "Prince Henry" models to their ranges. The first Alpine Trial was held in 1909, in Austria; by 1914, this was the toughest event of its kind, producing a star performance from Britain's James Radley in his Rolls-Royce Alpine Eagle.
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McRae's death was met by much grief from former colleagues, rivals and fans alike. The announcement of his death took place during qualifying for the 2007 Belgian Grand Prix with ITV commentator James Allen informing viewers of his death. Formula One driver David Coulthard, a good friend of McRae, who was due to represent Scotland along with him in the Race of Champions at Wembley Stadium on 16 December, described him as "an understated yet fantastically talented individual", he also announced that he would race the 2007 Japanese Grand Prix with a helmet livery similar to that of McRae's as a tribute. During the finale of the 2007 Scottish Rally Championship, the "Colin McRae Forest Stages" held in Perth in September 2007, there was no number 1 car as McRae had been due to drive the course car on the event. Instead, his car was parked at the starting point of the rally, where fans were able to sign a book of condolences.
Rising investor confidence also indicates a rally, and it is perhaps more powerful than any economic indicator because when investors believe something is going to happen (a rally, for example), they tend to take action (purchasing shares in order to profit from expected price increases) that actually turn expectations into reality. Although it is an objective concept, investor sentiment shows through in mathematical measurements such as the put/call ratio, the advance/decline line, IPO activity, and the amount of outstanding margin debt.
The ultimate Grey Poupon car, except sideways on dirt. Funded by Christian Dior and his Jules fragrance, the Corniche rally car competed in the fearsome Paris-Dakar. In truth, there's very little Rolls-Royce to the Corniche rally car: it's a tubular chassis fitted with a four-wheel-drive system from a Toyota Land Cruiser and a small-block Chevy V-8. But, it looks like a Rolls, and that's what counts.
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.
Other rallies provide organizer-created "route notes" also referred to as "stage notes" and disallow reconnaissance and use of other pacenotes. These notes are usually created using a predetermined pacenote format, from which a co-driver can optionally add comments or transpose into other pacenote notations. Many North American rallies do not conduct reconnaissance but provide stage notes through the use of the Jemba Inertia Notes System, due to time and budget constraints.
Between 1997 and 2010, the regulations mandated that World Rally Cars must have been built upon a production car with a minimum production run of 2500 units. A number of modifications could be made including increasing the engine displacement up to 2.0L, forced induction (including an anti-lag system), addition of four wheel drive, fitment of a sequential gearbox, modified suspension layout and attachment points, aerodynamic body modifications, weight reduction to a minimum of 1230 kg and chassis strengthening for greater rigidity. The maximum width was set at 1770 mm while front and rear tracks shouldn't exceed 1550 mm.