Gauge

See you just confused me again. Is the wastegate solely responsible for how much boost the turbo builds up (PSI), by just letting certain amounts of exhaust passed (or not in the case of higher PSI)?

This wouldn't make sense to me as the larger wastegates show higher PSI on the site I listed. You would think the smaller wastegates would allow less exhaust to pass, getting more in the turbine, allowing a higher boost(PSI). Unless the larger wastegates, mean larger TO the turbine. Maybe I'm confused how the size relates to the wastegate, I assumed it was the size of the overflow(letting more pass back to exhaust pipes). Also thanks for the info on the external wastegate.

I'm sorry to ask but can you be a bit more specific on the exact functionality of the wastegate in reference to exhaust coming in and turbocharger (springs, compression, tuning, etc etc).