Sequential turbos
Discussion
They are not the same size, the original 2.7l V6 in the Jag, had twin turbos of the same size.
The primary turbo is a variable nozzle turbine and operates over the entire engine range but unlike more traditional single stage turbos the primary stage is sized to provide maximum transient performance up to approximately 2500rpm. Above 2500rpm the fixed geometry turbine secondary stage switches into operation splitting the engine gas flow between the two turbines.
The primary turbo is a variable nozzle turbine and operates over the entire engine range but unlike more traditional single stage turbos the primary stage is sized to provide maximum transient performance up to approximately 2500rpm. Above 2500rpm the fixed geometry turbine secondary stage switches into operation splitting the engine gas flow between the two turbines.
Edited by mjh64 on Monday 19th October 21:52
Max_Torque said:
The actuator on the big turbo is linked to peak manifold pressure and gives gives ultimate boost control the the system.
But what pressures drive the other two actuators and do you have any examples of the pressures the valves start to open at?
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