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Old 04-07-2004, 09:11 PM
 

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Difference of turbo and supercharger?

I was wondering, what are the differences between the turbocharger and the supercharger?

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Old 04-07-2004, 09:14 PM
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A` turbo is driven off the exhaust and a supercharger is driven off the crank of the engine, via a belt.
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Old 04-07-2004, 09:46 PM
 
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Turbo chargers use exhaust pressure to drive impellers to further drive another set of impellers to jam air into your intake. A "blower" would use the crank.
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Old 04-07-2004, 10:30 PM
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Turbos use exhaust pressure and volume to drive a turbine connected directly to the end of the manifold, where all the mains come together. The exhaust then flows through the exhaust sysetm, but when too much exhaust fills the manifold, it is evacuated through a waste gate as not to damage the turbo. While the turbine form the exhaust side is spinning, it's in turn spinning another turbine from the inlet side. Air is sucked in through the intake and is compressed in the turbo. The air is pushed through pipes into an intercooler which cools the hot air which was just passed through the turbo inlet. Air then travels into the engine. The faster all this happens, the faster the turbines will spin and inturn turn out more air, producing more boost and power. When the throttle body closes (taking your foot off the gas), the build up of pressure will be released through a by pass valve, also known as a blow off valve, so the build up doesn't back track and hurt the turbo.

Supercharger is less complicated. A belt turned by the crank, turns the blower or supercharger which rotates the turbines and compresses air which is tossed into the engine. The higher rpms will = more boost and power. A general misconception with these is that they don't make boost throughout all the rpms. With small superchargers, boost will stop being made after a certain rpm because of the small size of the turbine. The bigger the supercharger, the less boost will be made at lower rpms because the air will leak out due to the size of the supercharger. So all superchargers dont run throughout all rpms.

Little more extensive info for ya .
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Old 04-08-2004, 08:35 AM
 
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another thing about turbos is they have "lag", this is the time the turbo takes to spool up and make power and the lag time varies depending on the size of the turbo, larger turbos generally have more lag times

just some more info for ya

russ
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Old 04-11-2004, 07:54 AM
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Quote:
Originally posted by black86z28
another thing about turbos is they have "lag", this is the time the turbo takes to spool up and make power and the lag time varies depending on the size of the turbo, larger turbos generally have more lag times

just some more info for ya

russ
Lag is created because of the amount of time it takes for exhaust pressure to reach the turbo so it can spool up in relation to the throttle position. Smaller turbos do spool quicker reducing lag but generally make less power because of the lack of volume (similar to superchargers). Lag is also dependent on the distance from the exhaust port on the head to the inlet on the turbo and the size and shape of the pipe. Bigger is better to a point. If you go to big you lose volumetric pressure and the turbo cannot spool efficiently. Also rpm has an effect on lag. At higher RPM's the exhaust pressure is higher so lag becomes less.

The biggest advantage to a turbo over a supercharger is that turbo's have no parasitic loss since they use exhaust pressure that would be exiting the engine anyway and the back pressure is usually minimal if you select the right turbo.
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