To about 13-14 psi The Eaton works great ,above this pressure the manifold pressure gets to a point it starts to backflow into the charger as the charger housing pressure is exceeded,this creates heat as the charger works harder,and harder with increasing boost pressure , at the higher rpms the heat rises dramatically ,and exponentially ,losses soar,
there is no cooler made that can overcome the rapid heat gains at the very high boost /rpms
The charger performance also alters due expansion with heat of the charger and rotor,the clearances alter ,prolonged high rpm creates internal charger heat
The efficiency map kindly provided by Paul is not fixed ,as it is not heat adjusted ,
19% is way off the map at the high rpms,
Coooooperslad has it well summarised |