A fuel tank safety system includes an ullage cooling assembly and a system controller. A first actual volumetric efficiency value which corresponds to a sensor error, is then determined at a first measurement point in a first rotational speed range in which a change in the flow losses in an intake tract has only a minor effect on the volumetric efficiency. The user’s operating system and media player treat the data stream as if it were a being delivered over the Internet from a streaming web server. The present invention is also directed to a method of manufacture of filters having the above-described characteristics.