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Engines are big air pumps.....The more air you can move through a engine with the proper amount of fuel, the more power the engine will produce!
How much air the turbo can move is HUGE in relevance.
The air the turbo moves is more important than the pressure.
Pressure can only be made by restriction......... without restriction boost can not be made.....the turbo can spin 200,000 rpm and without restriction it will not make boost.
Many engine dynamics and plumbing to and from the engine can restrict the engines flow and efficiency.
The turbos are also a item of engine efficiency.......
The stock turbo is the smallest restriction in the stock Z32 after changing out the poor stock exhaust components.
The engine can flow much more air with a larger turbo because it has less resistance and flows a larger volume of air. Because of this the engine will make more power with less boost with a bigger turbo. This means the engine can reach the same air flow number at a LOWER boost level. This means the engine will produce the same power at LOWER boost.
Of course if the boost is raised to the same level the old turbos were making it is going to make significantly more power.
:Actually the volume of air a turbo moves is irrelevant. How much power an engine makes does not depends on the volume of the air the turbos pump in.
:The volume of air produced by the turbos is not factored into the equation of the engine flow. It depends on the displacement of the engine (air volume), rpm, manifold pressure and volumetric efficient of the engine.
:It's true that bigger turbos make more power at the same boost level. It's because they are more efficient. Thus the same amount of air engine takes in is much cooler and denser. This leads to more power. You will notice with the same car, same turbos, dyno can produce huge difference in numbers from a hot day to a cold day.
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