Hi everyone! I think that many of you have such choiсe and so I faced it too. As far as I think about tuning my engine I have two ways - either leave it atmospheric (and there are two ways of tune) or put a turbocharger in it, making it's very powerful and torque.
So, it is difficult for me to decide, and some of you may face such dilemma. That's why I write this post - to describe the both systems - atmo and turbo and list all pros and contra.
Let me to begin with describing a usual atmospheric engine, which is placed under the hood of almost all cars. May be it will sound strange, but an atmospheric engine is an internal combustion engine without a supercharger. As we know all engines use not pure or solid fuel, but a mix of petrol and air in a ratio of 1 to 14. The mix is prepared by a carburetor or injector, depending on the engine type. In atmospheric engine an air is absorbed in intake due to low pressure of latter.
If we speak about turbo engine, an air gets in intake under high pressure charged by special turbine. However the construction of such engine is much more difficult than just atmo engine and uses additional parts. For example:
The turbocharged engine has a turbocharger (which consists of a rotor, a compressor, bearings, special seals), the turbine of a special case and a pair of paddle wheels connected by the shaft, the valve which removes excess pressure and intercooler.
Here we go with a pro and contra of the both.