Originally Posted by Sam O'Keefe
I can't see how this would damage the turbo in any way whatsoever... it can only spin as fast as the exhaust gases permit, having a longer inlet tract has nothing to do with how fast a turbine spins, as i mentioned they flow massive amounts of air a second. All that will happen will be a cooler charge being delivered into the engine at a lower pressure (Pointless) at the same turbo speed.
?? The wastegate system is what controls the turbine max speed, but indirectly through limiting compressor delivery pressure. If you change the relationship between speed and compressor delivery pressure, then you can potentially increase the compressor speed. For example, if you are trying to run high boost and lose one of the hoses, you can quickly overspeed the turbo because the delivery pressure drops through the floor...