German tuner Alpina has created the B3 GT3, a racer for the road that’s set to make its world debut at the 2011 Tokyo Motor Show. This vehicle, with a price tag of EUR90,000 ($120,000), has a limited run with only 99 units to be produced. It’s apparent that Alpina wants to attract fans of the new BMW 3-Series.
The B3 GT3 is based on the E92 BMW 3-Series Coupe. It is equipped with an engine that evolved from the 3.0-liter twin-turbo straight six of the Alpina B3 S Bi-Turbo.
It has been given a new exhaust system that features an Akrapovic titanium rear silencer, which gives the engine 8hp more. The unit now produces 408 hp at 6,000 rpm and 540 Nm (398 lb-ft) at 4,500 rpm. The Alpina B3 GT3 could accelerate from zero to 62mph in just 4.6 seconds and it could reach a top speed of 300 km/h (187 mph).
To manage the vehicle and keep it under control, it comes with an adjustable sports suspension, several 19-inch lightweight forged wheels, and a braking system that has been enhanced. It was subjected to several aerodynamic modifications and its interior has gotten a couple of Recaro bucket seats and a new sports steering wheel that has an Alcantara finish.
By implementing an optimum design and then combining with the different aerodynamic components, it ensures that the lift of the B3 GT3 is dialed out entirely. It is easy to say then that this will be the first road version of the BMW Alpina to show actual downforce not only on the front end but even for the rear. This downforce, aside from being equipped with innovative suspension technology and spirited drivetrain, is one of the reasons why the B6 GT3 has managed to match its rivals in the ADAC GT Masters. For those familiar, downforce plays an important role when it comes to attaining fast lap times.
The B3 GT3 special edition is fitted with various aerodynamic features, most of which were taken from the knowledge gained during motor racing. Still on this particular feature, what happens is that the carbon splitter on the front has been mounted on the front spoiler’s underside and then combined with the dive plates, which have been mounted on the side of the vehicle’s front valence.
The overall result is that the front end is able to experience amazing aerodynamic properties. In order to make sure that this aerodynamic attribute is balanced, on the rear there is a carbon wing mounted. What happens is that the rear wing helps lower the lift at the rear end but ensures that the drag coefficient is not affected. Helping improve the efficiency of the aerodynamics for the rear is the black matt rear diffusor.
As already mentioned, one of the reasons why the B6 GT3 has managed to attain a number of victories in different racing circuits is the coilover suspension technology. This is true even if different races require different set-ups as well. Generally, how the suspension and the chassis has been configured ensure that there is an increase in performance while lateral grip is retained at exceptional levels.
Similar to the B6 GT3, the understeer and oversteer of the B3 GT3 can be changed depending on the personal preference of the driver by simply adjusting its camber which is at its front. The use of the suspension for the new B3 GT3 is a good example of what is known as direct transfer of technology as it is moved from the racetrack and onto the street.
This means that there was a need to adjust the suspension and there are various requirements as well as the necessity for balancing and fine-tuning in order to meet any customization needs. Since the height of the coilovers can be adjusted, it meant that the ride height of the B3 GT3 itself can be changed as well. Then there are the dampers which allow for 18-fold rebound adjustment and have a 12-fold compression.
To make sure that normal driving is comfortable but dynamic, there is a need to ensure that the range of adjustment must be calibrated carefully. However it also allows for adjustments to its amplitude in order to get a set-up that is completely track-focused. So that the basic components of the suspension, like the stabilizers and springs, of the B3 GT3 would be able to adapt to the dynamic focus, Alpina made sure that it had to be specifically calibrated.
There was a need to have a firm connection when it comes to the chassis so that the front end had special top mounts on them with top mount plates that could be adjusted. With all of these different features, it is no wonder then that the B3 GT3 is able to meet the expectations one would have from Alpina considering the poise it displays and the excellent neutral handling.