Another Possible Turbo Failure???

[mp302007]

Originally Posted by mp302007

i didn't mean to imply that a turbo feeds one group of three cylinders. what i was thinking was since the turbos feed a common "rail", if one is producing no boost then the other will be pressuring the inlet tract but at some point the air will force its way back out the side which isn't doing any work.

i accept your point on the timing. so does the ecu advance it even more "ahead" of tdc? this, presumably, allows more time for the compressed charge to drive down the piston on the power stroke. the ecu then takes knock sensor input to avoid pinking?

think i'm going off thread somewhat now.

can't edit my last post; it should have read something along the lines of ...

i didn't mean to imply that each turbo feeds a group of three cylinders. what i was thinking was since the turbos feed a common "rail", if one is producing no boost then the other will be pressuring the inlet tract but at some point the air will force its way back out the side which isn't doing any work. since an afm effectively covers a bank of 3 cylinders (front and rear), my words were trying to cover the ecu "seeing" air flow for each bank separately, ie if the front turbo is broken, its afm (the therefore ecu input for those 3 cylinders) will see a reduced airflow.

the rest stands!