Custom Both Exhaust
Custom Both Exhaust
what are the differences in superchargers and turbochargers?
i know a little bit about both. superchargers are naturally aspired, meaning it breathes in the air, while the turbocharger forces air out. superchargers can be bolt on, while turbochargers require modifications such as air intake and custom exhaust.. but i don't know everything. are superchargers more towards horsepower while turbo is torque? or is it the other way around? if a naturally aspired car races a turbo charged car, who comes off first, and who will win? could they ever make turbochargers as simple to drop and bolt like superchargers?
The main difference is the means by which the blower is driven
Turbo chargers are basically a gas turbine with the exhaust of the engine driving the turbine which inturn drives the attached blower (Typically a centrifugal blower).
Since exhaust gas drives the turbine there is not a direct mechanical connection from the engine in terms of power flow. Yes the turbo is connect via the exhaust and inlet pipes but that is it. The turbo operates from the exhaust gas only.
Also the centrifugal blower is not positive displacement so at low engine power the blower my be free wheeling and providing little boost pressure. When teh engine loads up and porduces more exhaust that is when the turbo "kicks" in and generates meaningfull boost pressure and additional engine power. Its not an necessary to have a dump valve but if installed it limits pressure at the top end when the engine is under max load.
Superchargers have a direct mechanical connection to drive the blower. A belt, chain , gear train or power take off shaft drive the blower. The blower is commonly a lobe style (A.K.A. Roots blower)
Superchargers operate at lower speeds than turbo's and the blowers are positive displacement. Air pressure is available at low engine speeds and load. However since the blowers speed is tied to engine speed these blowers provide little additional air with the speed increase. This means that the blower must be sized for top end performance by using a large blower OR use a smaller lighter cheaper blower for low end performance and live with less top end performance.
If the blower is sized for top end then it will be producing a lot of air pressure at the low end. Too much in fact so it will need to be fitted with a dump valve or waste gate to limit air pressure at the low end. With blowers there is more "Design" involved with meeting the needs of power vs horsepower requirements, economy and cost.
Turbo chargers also need an oiler system to keep oil flowing to the turbo after the engine stops. The turbo will free wheel and gradually slow to a stop and requires oil to prevent bearings from burning out.
Superchargers stop turning when the engine stops so they do not need an oiler system.
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350z custom magnaflow true dual exhaust
