The Dodge Viper SRT10 ACR-X is powered by the SRT-developed 8.4-liter V10, equipped with factory headers and a low-restriction exhaust system, that produces 640 horsepower. The suspension also is tuned and upgraded specifically for on-track usage, while the weight is lightened by a full 160 pounds to take on even the most challenging road course. Additional aerodynamic upgrades improve downforce, while enhancing stability and significantly improving grip in high-speed cornering. Similar to the Dodge Viper Competition Coupe, the Viper ACR-X contains factory-installed safety equipment such as a factory-designed roll cage, fuel cell and race seat. Additional racing components are added to meet the significant durability and reliability requirements for on-track competition. The Viper SRT10 ACR-X is designed to compete in the Viper Racing League, Sports Car Club of America and National Auto Sport Association events.
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US car specialists GeigerCars.de from Munich have turned this established wisdom on its head, presenting their hottest shot with eye-catching bright green paintwork, the GeigerCars Ford GT Geiger HP790. Karl Geiger’s latest creation lives up to its name: the super sports car’s 5.4 litre V8 engine can reach a terrific 790 horsepower, an impressive 240 HP more than its series equivalent. Above all the replacement of the series-produced 2.3 litre with a more powerful 4.0 litre compressor which blasts the combustion chamber at over 1.25 bars. Larger throttle valves and a sports filter were also installed to supply the eight cylinders with even more fresh air. The engine and gear cooling systems had of course also to be adjusted to the new design as well as engine electrics. GeigerCars Ford GT Geiger HP790 shoots to 100km/h in just 3.6 seconds, breaks the 200km/h mark 6 seconds later and reaches 300 kilometres an hour in only 22.8 seconds – all this to bloodcurdling roars from the two 110-millimetre sports exhaust tail pipes – an in house development. Thrust and air resistance don’t balance until you hit 360km/h. The supercharged V8 reaches maximum power at 6320 rpm and its maximum torque – 863 Newton metres – at just 4600 revolutions. The classic Ford sports car proportions are taken even further with 60-millimetere lowering. The wheel housing can’t high superb matt black alloy wheels outlined in the car colour, mounted in 9×20 inches at the front and an impressive 11×21 at the rear. 245/35R20 Dunlop SP Sport Maxx tyres on the front axle ensure precise transmission of wheel commands whilst the drive axle 325/30R21 tyres constantly fight for grip and traction – if only so they don’t disappear in a cloud of blue smoke.
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The engine specialist MTM in Wettstetten proposes a considerable power enhancement for the new Audi S4 and the brand new Audi S5 Cabrio. Using its approved control device M-Cantronic, both cars, which are motorized by the 3.0 TFSI engine, become powerful sports cars with an incredible power reserve. The MTM S4 – which is declined in its Avant model – after its power therapy, stand as a real successor of the Audi RS4, and the current V8 of the RS4 is only 10 bhp more powerful than the MTM S4. Besides the engine control device M-Cantronic, MTM provides the series production car S4 with 4 rear pipes silencers with throttle valves. What results is 430 bhp (317 kW), 515 Nm of torque and an incredible 4.6 s from 0 to 100 kph (0-60 mph) with the 6 speeds manual gearbox. When a V-Cantronic is also implanted as well as the M-Cantronic, the normal 250 kph top speed reachs 285 kph.
The S4 is not the only model which is motorized with the 3.0 L engine and new compressor technology. The S5 Cabrio is also built with the factory-made engine. It is then logical that MTM modifies the S5 Cabrio which allows cruising around with a massive power reserve. The tuning specialists from MTM propose different stages of performances, starting with at 380 bhp (280 kW) and 480 Nm of torque, which means about 47 bhp more than the series model. Who wishes the complementary exhaust systems with throttle valves in 4 rear pipes optic (4 x 80 mm), has access to the ultimo stage of power enhancement of 430 bhp and 515 Nm.
So much power in the new MTM S4 Supercharged needs an important brake system, that the customers can of course find by MTM. With 380 x 34 mm disk brakes, drilled with 8-pistons calipers, the S4 decelerate much better. With body work, MTM trusts the series model. However, MTM puts new lowering springs which lower the car up to 40 mm on the front axe and up to 45 mm on the rear axe. To reach the perfection, the package includes 19″ rims in the original Bimoto design with dimensions 255/35 ZR 19. Of course, the 20″ rims are also available in option.
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