daft questions about engine efficiency
Discussion
I like to think that I've got a reasonable grasp of the workings of engines but there is a few things that I don't quite understand.
In an ideal world the flowrate (of air) through an engine would be as high as possible for a given rpm. However the valves are the main source of resistance, hence things like 4 valves per cylinder.
However someone said in another thread (to do with head systems on TVR Rover v8's) that if the airflow is too slow then the engine will become less efficient. Surely having to accelerate the air up will cause losses and decrease your air flowrate.
I would have thought that the most efficient engine would have the most free flowing intake system without any losses.
So what is it I'm missing?
Andy
In an ideal world the flowrate (of air) through an engine would be as high as possible for a given rpm. However the valves are the main source of resistance, hence things like 4 valves per cylinder.
However someone said in another thread (to do with head systems on TVR Rover v8's) that if the airflow is too slow then the engine will become less efficient. Surely having to accelerate the air up will cause losses and decrease your air flowrate.
I would have thought that the most efficient engine would have the most free flowing intake system without any losses.
So what is it I'm missing?
Andy
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