Quote:
|
Originally Posted by dingocooke A cowling is good when a fan is running constantly (ie a mechanical fan driven of the water pump), because the cowling stops the air being drawn from the side of the blades rather than through the rad core.
However (why is there always a however??) when the fan is not running the cowling will restrict the airflow over the core of the rad.
If you think about it to get the same volume of airflow through the cowling fan diameter area as the larger radiator area, the air needs to be travelling at a higher speed.
So for a given road speed, with no fan running, the cowled rad will have less airflow through it.
If you dont believe this check out various factory built mass produced cars underbonnet; you will see older mechanical fanned cars with cowls, and newer thermostatically switched electric fanned cars have no cowl, just a peripheral ring to stop fap tip washout.
So, dont fit a cowling  |
Sorry, I have to disagree with you, cause most Audi cars have a raditor cowlings with electric fans mounted to them and works fine....???