turbocharger

Hmmm do you mean advantages between a turbo charger and a super charger?

If I remember correctly a turbocharger is driven from the exhaust gases and can suffer from 'lag' i.e. the accelerator is floored and there is a noticeable time delay before the turbocharger pressurises the inlet manifold, however, the ehaust gases which drive the turbo are a free source of power...

A supercharger is driven from the engine or by an electric motor and so gives a constant high pressure to the inlet manifold.

Both increase the mass of air entering the combustion chamber effectively increasing the amount of charge per cylinder giving an increased power per cylinder...

John.

A turbine-driven supercharger (turbocharger) does put a substantial power draw on a motor by greatly increasing the back-pressure in the exhaust, diminishing volumetric effiency in the cylinder. This is especially true under heavy load. They both need to be throttled to prevent overspeed of a turbo when there is no manifold pressure, or overpressure in an engine-driven supercharger. Throttling of the supercharger is best done before the supercharger, and throttling of the turbocharger is usually done through bypass of the exhaust gasses before the turbocharger. The power requirement for a supercharger for a 3 liter engine with 1 bar of boost can exceed 40 HP. Electric motors are really rather useless. The same 40 HP would be drawn from the turbo to push the same amount of air. Figure typical supercharger of a positive displacement design (Most are) will run at a max of 10,000 RPM in extreme use. An exhaust-driven tubo (variable volume) will easily exceed 100,000 RPM in use. A failed supercharger results in a large bang, a failed turbo usually results in shrapnel.

RichH

A turbocharger uses exhuast gases to spool up and compress the intake air charge, basically 'free' power as it does not use any horsepower from the motor to run.

A supercharger is either gear driven or belt driven off of the crankshaft and consumes or uses some horsepower to operate. The bigger the compressor the more power lost. But the net effect is still more available horsepower. Generally speaking a supercharger is 'better' at making power as it will come into postive "boost" pressure quicker than a turbo. If the unit is belt driven it is easier to change pulleys to reduce or increase boost. If using a turbo it has to be sized for the application and to change it's boost capibility you would need to change the turbo out for another one.

68torino

Turbo or supercharger….driving experience. For daily driving, give me a turbo with a dump valve any day. You can bumble about all day quite economically but have great performance when you want it. A supercharger that is engaged all the time gives amazing linear performance, but as it's driven by the engine there is a greater penalty to pay with fuel efficiency. Having said that, they are more fun then a very fun thing! As with most things it comes down to personal opinion and application. For me, a turbo is the best option, as its so much easier to fit and adapt to almost any engine.