What are the benefits of an external wastegate?

What does an external wastegate look like?

An external wastegate, which is a separate and self-contained mechanism that is used with turbochargers without internal wastegates, is an example of a separate, self-contained mechanism. In high power applications where high boost levels are possible, external wastegates can be used to regulate boost levels more precisely than the internal wastegates.

Do you also need a BOV that has an external wastegate? A blowoff valve is not necessary. The air would return to your turbo. However, if your turbo is valuable, it should only spin one direction. A blowoff valve cannot control your boost, while a wastegate cannot vent excess pressure.

You may also wonder, "Why is an external wastegate more effective?"

External wastegates provide better boost control and response. The internal wastegate is simple to look at and build. By reducing the turbulence in exhaust streams, external wastegates reduce backpressure and create less pressure.

Are wastegates necessary?

The wastegate is not necessary if you're running less than 40psi. Simply plug the turbo's compressor housing. A wategate is required to stop turbo speed exceeding 40psi.