Originally Posted by Volvospeed

Wastegate: There are two types of wastegates, internal and external. Internal gates are actually inside your turbocharger, while external are just that. Both types perform the same function. They use the exhaust gases that the car produces to spin the turbine in the turbo, thus sucking the air in and creating boost. However there’s more to wastegates than just that. Inside the gate there is a spring that is set to a certain weight. Lets say the spring is set to 7 pounds. Once the spring has been pushed down by 7 pounds of boost, the wastegate will be completely open and the air from the turbo will go into your motor. This is what causes your spool up time, your waiting for the pressure to build to the point where it will press the spring down and enter the engine. That’s pretty much it for wastegates, they aren’t too complicated.

Should be:

Wastegate: There are two types of wastegates, internal and external. Internal gates are actually inside your turbocharger, while external are just that. Both types perform the same function. They use the exhaust gases that the car produces to spin the turbine in the turbo, thus sucking the air in and creating boost. However there’s more to wastegates than just that. Inside the gate there is a spring that is set to a certain weight. Lets say the spring is set to 7 pounds. Once the spring has been pushed down by 7 pounds of boost, the wastegate will be completely open and the air from the motor will by-pass the compressor wheel and flow straight to the downpipe.

Not sure what you are trying to say here:

This is what causes your spool up time, your waiting for the pressure to build to the point where it will press the spring down and enter the engine. That’s pretty much it for wastegates, they aren’t too complicated.

Air is always entering the engine or the engine stalls. Once the manifold has enough pressure to open the watsegate the turbo stops spooling up.