Audi revealed 2012 Audi S7 Sportback car

Audi has revealed the 2012 Audi S7 Sportback car which uses the same engine as S6 and S6 Avant.

 The 2012 Audi S7 Sportback car is powered with new 4.0 TFSI engine with 420 hp and 550 Nm of torque. The twin turbo V8 accelerates five-door coupe from 0 to 100 km/h in 4.9 seconds, and top speed of the car is limited to 250 km/h. The cultivated eight cylinder, which uses Audi cylinder on demand technology under part load consumes on average just 9.7L of fuel per 100 km.

The 2012 Audi S7 Sportback car interior has S badges, red ring on start stop button, S7 logo in illuminated door sill trims, aluminum strip on S tronic selector lever and aluminum shift paddles. The footrest and pedals are made of stainless steel.

The 2012 Audi S7 Sportback car features dynamic seven speed S tronic and quattro permanent all wheel drive system with self locking center differential, torque vectoring, adaptive air suspension sport and the Audi drive select dynamics system, 19-inch wheels, internally ventilated disc brakes, xenon plus headlights with LED daytime running lights, driver information system with color display and versatile MMI radio plus audio and operating system.

The 2012 Audi S7 Sportback car will be available for sale with dealers at the beginning of spring 2012.

Why is an Intercooler so Important to a Turbocharged Car

The internal combustion engine found in today’s cars is basically the world’s most mass produced heat pump. It converts what are basically the remains of dinosaurs into heat through the process of combustion. The combustion is used to force the pistons in the motor downward creating a torqueing motion on the crankshaft. This motion is converted by the transmission into usable power at the wheels of the car. A car equipped with a turbocharger or usually referred to as turbos for short uses an external device that is considered a power adder. A turbo is basically an air pump that forces more air into the cylinders of a vehicle.

When a turbo begins to build “boost” which is the slang term for the pressure that the turbo build in the engine a large amount of heat is created.  This heat can be damaging to a motor is not removed from the system and it robs horsepower from the motor as well. The more heat the air carries the more space the air will need to occupy. The device used to cool the air that is compressed by the turbo is referred to as the intercooler, this unit is basically a radiator that cools air.

The basic idea of the intercooler is that compressed hot air is spread out across a larger area than the pipes in the intake system. Once spread across this larger area the air will deposit its heat on the surface of the intercooler where it is released into the air. To add to the cooling ability fins are placed on the channels where the air travels, these fins allow the heat to be transferred more efficiently out of the system.

Once the air has been super cooled it is returned to the normal pipe size and it continues to the motor. The cooler air also needs less space which means that even more air can be forced into the cylinders of the vehicle. The more air, the more fuel that can be added to the cylinder and a more powerful combustion stroke can be achieved. A more powerful explosion in the cylinder means more power to the crank shaft and thus more horsepower at the wheels of the car. 

Why do Bigger Brakes Perform Better?

New car models all seem to have larger brakes each year but what makes that such a good thing? Performance enthusiasts always seem to change the brake calipers and brake disc on their cars to something different but why? The fact of the matter is that the brake system on a vehicle is one of the most important parts in the car. Even if a car has a blow engine it can still start rolling on a hill and if the brakes are gone it won’t be easy to stop.

The key to big brakes or just an overall great braking system is to match the system to what the vehicle is intended for.  The idea of larger brakes is that larger brake pads can be fitted and more contact can be made between the pad and the disc. Big discs are not the only factor in better stopping power, evenly spaced and properly positioned pistons for the calipers are a huge factor.

The disc is very important to the braking as it must be vented for proper cooling and slots can be added for even more. There is a down side to slotted or drilled rotors and that is when the drilling or slotting is done it reduces the surface area of the disc and thus lessens the cars ability to stop. Many times it will be seen on the road when some car owner bought the “upgrade discs” for their car and now it can’t stop as quickly.

The key to brake upgrades is to go larger and also add slotted or cross-drilled rotors to reduce brake fading over time. There is not really a cheap way to get better braking in a car so be sure before ordering a set of “upgraded” discs that there is a plan to do a complete brake system upgrade. Lastly don’t forget that the tires are the only part that touches the tarmac so if they are bad the brakes won’t help.