I was midway through writing a long-ass comment about turbocharger technology, but accidentally deleted it and I've lost steam already.
Instead, here is a car which hisses when changing gears and goes "pst pst pst pst" when maintaining light throttle. And here is a one which is also super high performance, but does not hiss and burp.
that "pst pst pst" sound is the sound of air physically get chopped up by the compressor blades. It may sound like he's maintaining light throttle but he's actually going on and off throttle, presumably to rotate the rear-engined 911. recently picked up go karting to improve my real-world driving skill, this technique is magic...