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If you're interested in adding power and performance to your ride, no doubt you've considered adding a turbocharger (just turbo to tuners), or a supercharger to your ride.  However, it can be difficult to determine which is the best for your needs.  For instance, what is the peak operating range of a turbocharger, versus a supercharger? How much horsepower can you gain from each and which is more cost effective?  Here are a few answers to your myriad of questions.

First, you need to understand how each system operates, before you can make an informed choice.  Both turbos and superchargers are a form of forced air induction.  In other words, they provide boost by forcing more air into each cylinder.  More air means more fuel can be dumped in, resulting in larger explosions, more rapid explosions and greater speed.  Basically, they provide more air, which results in longer, cleaner burns.  You waste less fuel, and go farther, faster.  However, that’s where the similarities end.

Turbos:

Turbochargers operate on spent exhaust gasses.  These gasses enter one half of the turbine, propelling the turbine and forcing compressed air into the engine.  The drawback to this method is that the air is very hot (use an intercooler to combat the heat) and the turbo operates at a fairly high RPM rate (75K to 150K RPMs).

Superchargers:

Superchargers are a little different from turbos.  Unlike turbos, they do not operate on exhaust gas.  Instead, they use a pulley and the belts on your engine to drive the impeller, rotating screws or rotors.  This forces air into the engine, providing more boost for your ride.  Superchargers operate at a lower RPM rate than do turbos (anywhere between 15K to 40K, depending on the type of supercharger).

That's all well and good, but which is better, you ask?  That depends on what you want.  Both systems cost approximately the same (there will be a few dollars difference, but not much).  However, superchargers experience much less lag than do turbochargers. This results in more immediate power.  However, turbochargers can provide more boost at higher rates of speed, meaning that you get more out of them at higher RPM ranges.

Turbochargers also create more boost surge, which can damage engines, as well as creating additional backpressure that must be forced out through the headers.  Superchargers produce more noise than turbos, but are generally longer-lived, providing you with a longer lasting performance enhancement.

In short, it comes down to personal preference.  Both devices provide an amazing boost to your engine performance, knocking your speed capabilities up dramatically. Both systems have pros and cons associated with them, as well.  You choice will also depend on your usage.  For instance, a supercharger is ideal for a street machine, but if you are going to the track, a turbocharger offers better benefits. Before choosing either system, you will need to define your needs, as well as any future use of your ride, in order to make the best choice.

Maker of GMC carpet kit, General Motors built the new Saab 9-3 Range just like any other top products of the company.

The new Saab 9-3 range is physically identified with its all-new bodywork forward of the A-pillar, with new bumper moldings and light assemblies in the front and rear. Its new doors and handles for the Sport Sedan and SportCombi are also particularly distinguishing. Across the range, the flared side sill extensions are now standard. All these details blend to give the car a definite identity as well as a more stunning look. For the Sport Sedan, 70 percent of the external body panels and parts are all-new. In a liberal and modern way of expressing the brand’s distinctive character, the styling blends contemporary and classic Saab design themes.

Almost the entire exterior of the new Saab is similar to the Aero X concept car. The new Saab grille is matched with all-new headlamp lenses and light units that now have a thin ‘eyebrow’ lighting zone. In an upswept rear edge, the wraparound units top off. A central wing motif is vividly seen in its grille. This car has a ‘clamshell’ hood that closes across the top of the front wings. The hood pressing has a sweeping, U-shaped styling line as first seen on the Aero X. The other similar Aero X themes are the swept-back frontal lines with front bumper and splitter assembly with a deep, trapezoidal air intake.

The rear of the Sport Sedan and Convertible now feature smoked white light clusters. The Saab has new bumper moldings that are much deeper with curved, flat surfaces. To accommodate new matte chrome life handle trim with an integrated badge, the trunk lids of the Sport Sedan and Convertible are also substituted with the one similar with the SportCombi. All the external rubbing strips from bumpers and doors (color-keyed on the Convertible) are removed and new door panels now has a simple form with redesigned and color-keyed handles. The visually integrated front and rear with the scalloped corners of the new bumper moldings are sill extensions.

Other exterior refinements include the new flat wiper blades to reduce wind noise, and new alloy wheels, with an 18-inch design now offered as an option on all variants aside from the 1.8i models. Two new colors are added to the range. This includes a Snow Silver metallic paint finish which resembles that of the Aero X.

For a sporty driver focus, the Saab XWD offers greater driver involvement. The new Saab 9-3 Range is comprised by an active system for class-leading performance of up to 100 percent rear torque transfer, high end technology that include pre-emptive engagement and active rear LSD, and new rear sub-frame and suspension geometry.

Other reinventions for driving include Sport Mode standard for automatic transmissions and optional cornering bi-xenon headlights.

The class-leading two-stage diesel turbo engine plus the extension of Saab BioPower are the in charge for the car’s performance. It is further boosted by the increased power for 2.8V6 turbo in combination with Saab XWD.

As to the power train, the 9-3 range comes with a new 1.9 TTiD engine. The 9-3 range features a powerful new four cylinder diesel engine with a one-of-a-kind two-stage turbo charging system, a world’s first in the premium car segment, giving class-leading levels of efficiency.

That does not end the improvements and added things to the new Saab. Another new features are the 2.0t BioPower and the improved 2.8V6 Turbo. The Tire Pressure Monitoring (TPM) and the Bose Centerpoint Surround Sound audio are among the other improvements for the car.

Interior designs and features include the cockpit feel and driver-focused themes of the Sport Sedan and SportCombi. The rear passenger area incorporates an 'f'ixed-head' interior ambience. It is the first convertible to offer soft-top with light colored headlining. One unique feature is the 'hydroblox' water repellent textile for seat upholstery.

Other interior features include ‘Profiler’ customization, ComSense functionality through 'dynamic workload management', ‘light room’ or ‘dark room’ interior themes, dual zone air conditioning, infotainment systems that include DVD/GPS satellite navigation with large 6.5-inch color monitor, Bluetooth™ Phone Integration system (BPIS), and fordable wind deflector.

On the chassis, the 9-3 Convertible possesses an ‘ReAxs’ passive rear wheel steer characteristic, four-link independent rear suspension, front suspension by MacPherson struts with lower A-arms mounted on a hydroformed (hollow) sub-frame, low mounted steering, Mechanical Brake Assist (MBA), advanced chassis electronic systems, and a minimized unsprung weight.

As to the safety, the car has undergone crash testing based on ‘real life’ research as well as a broad range of crash test configurations. Its safety features include 'DynaCage' rollover protection, front seat-belts that are fully integrated mounted entirely to frame of seat, Saab Active Head Restraints (SAHR), and adoptive front airbags as well as two-stage side airbags.

All these things and more!

The entire parts of the new Saab demonstrates the brand’s stronger and more attractive identity that would make it more patronized by the public.

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At the 77th Geneva International Motor Show Chrysler Group's Jeep division has showcased seven new all-new models expanding the company’s product range of on- and off-road sport utility vehicles (SUV).

According to Thomas Hausch, Executive Director – International Sales and Marketing, Chrysler Group: “The Jeep brand is on a product offensive and will continue to grow with new offerings that leverage Jeep’s legendary 4x4 leadership. We have solidified the Jeep brand’s foundation with the all-new Jeep Wrangler and Wrangler Unlimited, while also stretching the brand to reach new customers in the growing compact SUV segment with Jeep Compass, the segment’s most fuel-efficient vehicle, and Jeep Patriot.”

One of these new SUV models presented at Geneva is the top of the range Jeep Commander Overland, which offers more features and refinement inside and out for the 2007 model year.

During its launch at the Geneva Motor Show, Thomas Hausch said: “Jeep Commander is the first seven-passenger 4x4 that is as capable as it is distinctive. It is also the only SUV in its class to offer two V-8 petrol engines, as well as a class-leading diesel V-6. Now with the understated luxury of the new range-topping Overland model, Jeep Commander becomes the ultimate expression of Jeep ‘Classic’ design and an even more compelling package for customers in Europe and other international markets.”

Jeep Commander Overland offers an enhanced interior with new high-quality materials and accents providing a comfortable ambience for the occupants. Interior highlights include leather-wrapped steering wheel with Vavona Burl wood rim insert, leather trimmed centre armrest, leather trimmed door grab, leather trimmed handles, leather trimmed gear shifter, Vavona Burl wood trim on upper instrument panel, centre floor console bezel, and front door switch bezels. In addition, the two-tone seats come with Suede Microfiber and leather trim, with an Overland logo embroidered on the front seatbacks. A bunch of interior color combinations is also available. Comfort and practicality is an important factor for the Commander Overland. The seating capacity is two in front, three in the middle, and two at the rear. Cargo compartment volume is at 212 litres (7.5 cu. ft.) with third row seats upright, and 1028 litres (36.3 cu. ft.) with third row folded.

Outside, the Jeep Commander Overland embodies the traditional Jeep styling, marked by the vehicle's bold and aggressive body highlighted by the honeycomb mesh 7-slot front grille, lower front fascia, bodyside mouldings, roof rack side rails, and the rear tailgate badge. An 18-inch 7-spoke machine faced aluminum wheels with all-season performance tires completes the overall appearance of the Jeep Commander Overland.

Moving on the technical side, the Jeep Commander Overland comes with two power plants for the customers to choose from: the 5.7-litre HEMI V8 and the 3.0-litre V-6 turbo diesel engine.

The 5.7-litre HEMI V8 petrol engine is standard for all Commander Overland models. It is rated to deliver 326 hp (240 kW) at 5,000 rpm and produces 369 lb.-ft. (500 Nm) amount of maximum torque rotating at 4,000 rpm. For fuel efficient customers, the 3.0-litre V-6 turbo diesel is available, capable of producing 218 hp (160 kW) at 4,000 rpm and 376 lb.-ft. (510 Nm) of peak torque at 1,600-2,400 rpm. The engine has 6 cylinders and features common-rail high-pressure direct injection to provide improved fuel efficiency and cleaner exhaust emissions. Both engines are combined with a standard 5-speed automatic gearbox.

To enhance the vehicle handling and steering, Jeep has equipped the Commander Overland with high-quality suspension and chassis parts including live solid axle and five-link suspension, twin monotube shock absorbers, rack-and-pinion with hydraulic power assist, and Jeep Lift kits.

In another one of our articles we discussed some diesel performance items that can help you cross the threshold from diesel performance hobbyist to an extreme diesel performance connoisseur.  Some of the items that we covered in the previous article include performance injectors and lift pumps.  Now once you have gone as far as you can on bolt on parts, its time to start doubling up...on everything!  The great thing about diesels is that they don't have to be as fine tuned as gas vehicles.  If you can find a way to dump more fuel into them then it's all a matter of mixing enough oxygen with the fuel.   If you can find a way to get enough oxygen in there then what you end up with is HUGE HORSEPOWER AND TORQUE!  Now in this article we won't cover some of the other options that are out there when it comes to getting that extra fuel to combust such as Propane, NOS, Water Methanol Injection and CNG, in this article we are going to focus more on finding ways to increase oxygen and fuel levels with other means.  Going back to earlier when I mentioned doubling up, there are three main areas that you can double up on your diesel to create some huge results including Stacking Chips, Dual Injection Pumps, and of course Twin Turbos.Stacking Chips- If one diesel performance chip gives you extra power, won't two chips give you even more power?  That is the idea behind stacking multiple diesel performance chips on your rig.  The key to stacking chips successfully is knowing what kind of chips you are trying to get to work together.  Within the diesel performance chip/tuner industry manufacturers use a few different methods to increase the horsepower in your engine, some of the most possible methods are adjusting timing and increasing pressure.  When you are thinking about stacking chips it is best to find two chips that increase power in two different ways, for example one of the most common stacks for Cummins owners is using a Smarty Tuner with a Dr. Performance chip.  The reason this stack is so popular is the fact that the Dr. Performance Chip increases pressure while the Smarty Tuner uses a couple of different methods to increase power and actually has settings to where you can back off the pressure.  If you had two chips that adjusted the timing, you would find that your vehicle would run poorly.  For legal reasons we won't tell you which stacks we have found to work best, but we will tell you to be careful as you start to think about stacking your chips, it may be more power than you can handle.Dual Injection Pumps- Need more fuel? Then we recommend checking out some of the dual fueler kits out there on the market.  As I said earlier half of the equation of more horsepower is more fuel, so what better to get you there than a second injection pump.  Now this little trick doesn't work with the older diesels which is fine because you can turn the pumps up considerably on those but on the newer common rail diesels like the Cummins and the Duramaxes that utilize the CP3 injection pump to flow fuel into the rail the hottest craze for more power is adding a second injection pump.  Once you have added a second injection pump you will be able to flow enough fuel to get you up to 1200 horsepower and your fuel pressure will increase up to 28,000 PSI.  Currently the most well known companies that are offering Dual CP3 injection kits are PPE, Industrial Injection and ATS.Twin Turbos- Put simply, you'll get more power, quicker response, cooler EGT Exhaust Gas Temperature's and lower exhaust emissions with a set of twin or compound turbos.  With all the fuel you will have running to your rig with a set of stacked chips and Dual Injection Pumps you are definitely going to need some more oxygen to get some combustion going on.  Twin or compound turbos are the perfect answer for those looking to push more air into the intake manifold.  By doubling up on turbos you are going to be able to flow a considerable amount of more fuel while lowering your exhaust temperatures allowing you to run more horsepower safely.  Twin or compound turbo setups are most common on the Dodge Cummins and are offered by companies like BD, Industrial Injection and ATS.  More and more kits are coming out for the Duramax, and if you are a Powerstroke owner good luck, kits are few and far between for your rig.So if you are looking to turn your diesel hobby into an extreme diesel passion, these are definitely a great place to start.