Boost by pass

Just wondering if the boost by pass is really good for the engine or not. Read some info on the Eaton sight that seems to say it is really just there to cut done on the supercharger wine. I hear from other people that is causes exessive heat to build up. Any clarification would be greatly appreciated. Hear is the info direct from Eaton on the Boost blow-off. Are Eaton superchargers noisy? The Eaton supercharger system incorporates
a specially designed bypass valve, which is actuated by a vacuum motor near the
throttle body, and recirculates the supercharger air flow when boost is not
required. During typical driving conditions, the engine is under boost around 5%
of the time, which means the remaining 95% of the time the engine is under
vacuum, allowing for better fuel economy and a quieter ride. In addition, the helix
angled rotors, along with specially designed inlet and outlet port geometry, also
reduce pressure variations resulting in a smooth discharge flow and a lower level
of noise during operation. The associated ducting and mounting used in installing
the supercharger can play a major role in reducing the noise emitted by the supercharger.
 
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