Subaru Wrx Sti Hatchback
Exterior viewSalonEngineChassis
Thanks to its low center of mass, the Impreza WRX STI is characterized by outstanding wheel-balancing, traction, and traction characteristics, which are ensured by the combination of the Symmetrical AWD symmetrical all-wheel drive system and the turbocharged 16-liter Subaru BOXER DOHC of 2.5 liters. In ordinary conditions, the moment between the front and rear wheels is distributed in a ratio of 41:59.
But this proportion can be changed by the central differential, which is controlled by electronics according to the signals of acceleration sensors, the position of the control wheel, and the engine speed. In addition, the driver can forcibly shift the balance towards the front or rear axle. The moment between the rear wheels is distributed by the Torsen mechanical differential. A differential of the helicoid type is installed on the front, which has a milder character. The upgraded 2.5-liter turbocharged engine added twenty forces compared to its predecessor. On the camshafts of the intake and exhaust valves, mechanisms are installed that change the valve timing, the dimensions of the radiator for charge air are increased. By reducing the maximum torque, the engine was made more elastic. At seven,000 rpm. an electronic limiter is activated – a moment earlier a red light flashes on the dashboard. Managing third-generation STIs has become easier. SI-Drive system (also used on Legacy) allows the driver to change in one direction or another the rigidity of the “binding” of the engine to the accelerator pedal, thereby exacerbating reactions, or vice versa, mitigating them. You can quickly change the mode of operation of the central differential: on a slippery stretch of road, for better realization of the moment on the wheels, with one movement of the toggle switch (located at hand next to the gear lever), a rigid connection between the axles is turned on, and on dry asphalt you can easily cancel the lock. The middle position of the toggle switch corresponds to the automatic mode. In this case, the DCCD system, based on the signals of the sensors analyzing the driving conditions, determines itself when and how much it is necessary to block the differential. The degree of intervention of the disconnected VDC stabilization system also lends itself to adjustment to specific conditions – the desired mode is selected by a series of button presses.
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