STUTUTUTU That iconic “stutututu” sound on the R34 GT-R isn’t from the engine itself—it’s from the blow-off valve or compressor surge in its twin-turbo setup. When the driver lifts off the throttle, the throttle plate closes but the turbos are still spinning and forcing air forward. That trapped boost has nowhere to go, so it hits the closed throttle and bounces back through the turbo compressor blades, making that rapid “stu-tu-tu-tu” flutter. Many R34 owners intentionally remove or modify the

Centrifugal Compressor Surge Protection 👍🏻 | Process Engineering World