new 911 turbos WTF

[GreyGoose006]

Originally Posted by KiwiBacon

You've still got a lot of frictional loss there. Still spinning the turbo, still pumping air. Just letting the recirculated air go around in circles getting hotter and hotter.

Seamless transition would also be a major issue.

what if the turbo was set up to pump air into a tank, and did so all the time. when you punched the thottle a valve would release air from the tank. the tank could be cooled, and when the pressurized air was released, it would get cold.
you could have a midsize turbo that was just pumping away into a large tank, and air would be released only as needed. like having a power button, except it would be controled by throttle position.

am i crazy?

[SaabJohan]

Originally Posted by GreyGoose006

what if the turbo was set up to pump air into a tank, and did so all the time. when you punched the thottle a valve would release air from the tank. the tank could be cooled, and when the pressurized air was released, it would get cold.
you could have a midsize turbo that was just pumping away into a large tank, and air would be released only as needed. like having a power button, except it would be controled by throttle position.

am i crazy?

WRC cars ran that solution for a few races (it was banned). But it was used to overcome the flow limit of the mandatory restrictor at full throttle, not to reduce turbo lag (as there is no turbo lag on a WRC car).

In a WRC car the turbochargers provides boost pressure all the time, even when engine engine is running with a closed throttle due to the anti lag system. So when the engine was off throttle, pressurized air from the turbo was fed to a large tank (Ford ran a tank made out of titanium sheets behind the rear bumper). When full throttle was applied, above the point where flow is limited by the restrictor, and when tank pressure is higher than plenum pressure, the tank supplies the engine with more air than can pass through the engine. That can result in perhaps 10-20 more hp as long there is an air supply.

[GreyGoose006]

the tank could be really big to prevent excess back pressure when the turbo started slowing down when the pressure built up. i think the ideal setup would be that it only released pressure at full throttle, or when you puched a button. you could get massive power gains though. you could easily use a small turbo and get like 30 psi boost.