In the civilian tuner world, which I would guess you're involved in from your posts that I've read, this may be true. However it is only true due to the limitations imposed by off the shelf turbochargers. It isn't some inherent limitation that automatically means that they are worse.godlameroso wrote: ↑Thu Jan 03, 2019 3:27 pmInternal gates suck for boost control, everyone that wants better boost response goes external gate and boost controller.saviour stivala wrote: ↑Thu Jan 03, 2019 9:10 amThere must be quite some technical differences that gives a justified technical advantage for a formula one engine designer to opt for an external waste-gate system that initials the extra hardware (external waste-gate, external bypassing exhaust pipes all the way to the rear of the car with all the added weight and space taking-up. Formula one component designers goes to extreme lengths to save weight and space.
The turbochargers that are available to the tuner market tend to be built to fit into small spaces to work in OEM sized engine bays with minimal modifications. As such internally gated turbines tend to have compromised turbine housings with small wastegate flaps which open at odd angles. The tuner manufacturers (Garrett, precision etc) know that if someone is chasing high boost pressures and have the space then they can spend the extra bucks on an external wastegate.
This isn't a limitation that is imposed on F1 manufacturers. Don't forget that externally wastegated turbochargers (on road cars) can still recycle the bypass gasses back into the main exhaust stream.