- I don't intent to open old wounds --but I want to expand my knowledge a little -- I decided to do more research in reference to a recent post that I could not speak intelligently to
La-Z-Linkand I came across this link - 1/3rd from the botom Volumetric Efficiency "This compensates for the fact that upon every cycle of the engine, not all of the old air/fuel mix in the cylinders is forced out the exhaust. Thus there is a difference between the actual airflow through and engine and the predicted airflow. This discrepancy is equated to a VE. " I could be wrong on this.. but looking at a compressor map in the LAZY LINK and understanding the description above - one could argue that at the same given RPM speed, if the VE has increased --- the cubic ft/min that the turbo sees has increased..but the engine RPM is the same. If that is correct, then the effect of an increase in engine VE shifts the point on the RPM line  diagonally to the right. This in theory will increase the max boost at that same RPM point assuming that the reference point in question is below the surge line - correct ??? By increasing the volumetric efficiency of a motor, this increases the wheel rotational speed ..which will generate higher turbine / compressor temps which are evidenced by higher EGT's ... Therefore, if you desire to keep the same EGT temps, you would need to lower the boost ... whenever the VE is increase, one should expect an increase in EGT at the same RPM points ... the real question is..where is the surge line ??? am I offbase here in my understanding ? Please pick apart and destroy ... damn anal compulsive disorder ..
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Volumetric Efficiency question ... - 
