Garrett Turbo

Gareth Hoyle asked:




If you have a need for a turbocharger then it stands to reason that you want one that is a high standard and will do the job you set out for it to do. If this is the case then you should look at only buying from one of the leading brands in order to make sure you get the best quality product possible. The Napier turbocharger brand is a leader in the design and manufacturing of these products. They are known worldwide for the products that they offer and for the standard of them being so high.

In case you are not sure; a turbocharger has a very specific job. It allows what would usually be wasted gas (the exhaust gas of an internal combustion engine) to be used to drive a compressor via a turbine wheel. If you work in the manufacturing industry you will know that this is a vital job and this is a very worthwhile process.

Turbocharging has become so popular because it is helpful in so many ways. It can help reduce things such as the weight and space required for diesel engine installations. Perhaps most vitally it also helps to reduce the cost. On top of that it makes a massive improvement to the performance and efficiency of machines.

If you buy a Napier turbo charger you can be assured of the quality of the product and therefore know that efficiency is going to be at its maximum. The brand name Napier has over 60 years’ experience in this field which should help give you some reassure to the quality of the product that they offer.

Their reputation is also so good because of the support that they offer to people both before and after they have made their purchase.

You only have to look online at a Napier turbocharger review website to be able to see just how many people have been very happy with their purchase. This is because the company is passionate about providing high quality goods and this shows in the high standard of the turbochargers that they have on sale.



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BoostTown.com asked:


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http://www.boosttown.com/forced_induction/turbo.php

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The turbo (also known as turbocharger) has been around for many years, almost as long as the internal combustion engine itself. A turbocharger, has two wheels on it. One is called the turbine and this sits in the exhaust system. The exhaust gas leaving the engine causes the turbine and the shaft fixed to it, to spin.

On the other hand of the shaft is the impellor, or compressor wheel. This pulls air in and the forces into the engine. For this to work effectively, the impellor wheel typically spins at 120,000 – 150,000 RPM (Revolutions Per Minute).

Many kinds of bearings used at these high rotational speeds need lubrication and cooling systems. The turbocharger’s lubrication system can be an isolated system or receive oil from the engine’s oil supply. For cooling the lubrication system may double as the cooling system, separate coolant may be pumped through the center housing from an outside source such as the engine coolant system, or the turbine may be air cooled. An oil lubrication and water cooling system using engine oil and engine coolant are commonplace in automotive applications. Special kinds of bearings, e.g. foil bearings, can reduce or eliminate the need for lubrication and reduce the cooling requirement.

Turbos rely on the flow of the exhaust gas through the turbine housing, they only start to spin after ignition has taken place and so there is a delay between opening the throttle and the turbo spinning and producing boost. This is known as ‘turbo lag’ and is considered to be a downside compared to superchargers.

The turbine and impeller are each contained within their own housing on opposite sides. These housings collect and direct the gas flow. The size and shape can dictate some performance characteristics of the overall turbocharger. The area of the cone to radius from center hub is expressed as a ratio (AR, A/R, or A:R). Often the same basic turbocharger assembly will be available from the manufacturer with multiple AR choices for the turbine housing and sometimes the compressor cover as well. This allows the designer of the engine system to tailor the compromises between performance, response, and efficiency to application or preference.

Eric Ferguson asked:


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.

 



Calvin