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Originally Posted by KiwiBacon
For an engine, air in through the throttle has to come out the exhaust.
At part throttle you're restricting the air in, which restricts the amount of exhaust out.
When you open the throttle (at any rpm) the amount of air into the engine greatly increases, this produces more exhaust which drives the turbo to produce even more intake air (boost).
Increasing rpm also increases the airflow (if you're comparing similar throttle position).
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To Mr Kiwi and Curtis,
so if the RPM is low and I open the throttle big, lots of air intake, lots of exhaust will generated and drive the turbo to build up pressure, but doesn't the big throttle and the engine can consume this pressure and balance at this "lots of air intake" condition??
how about in high RPM? can the pressure generated by turbo fully consume by the engine?