Originally Posted by GARETH T
the cylinder head will flow more because of less resistance
Ok - basically we are saying that the Turbo is a restriction, but not the only one!
For example, if the engine was in fact a straight piece of tube connecting the inlet manifold to the exhaust housing of the turbo, then at 2bar of pressure for a given turbo, the air flow would be substantially improved over that of a cylinder head.
As above, therefore, when you increase the duration of the valve opening on the cams, you are increasing the amount of time that air can be flowed, and thus the volume efficiency. Likewise, as the lift increases, same deal.
Is this right?
If so, what is the flip side of the coin? Clearly if it was one way traffic, we would all have valves the size of dustbin lids
This is a useful topic for me - I am beginning to understand a good deal more about this subject, so thanks to all for contributing
