Shrouding your radiator lets the fan pull air through the entire coreĤ. This means that almost 49% of the unshrouded radiator is not receiving any benefits from the fan. the core of the radiator is approximately 371 sq. For example, on a '32 Ford, the area of a 15.50' fan is about 189 sq. An unshrouded fan is moving air through only the portion of the radiator equal to the surface area of the fan. But, consider this - at idle or cruising speeds, you need the entire cooling system working at its optimum. A fan without a shroud is better than no fan. Always use the right shroud with your fan.įans move air through the radiator assisting in cooling the engine. All shrouded fans should be on the engine side of the radiator.ģ. Mounted on the engine side of the radiator, a pull fan does not interfere with airflow at highway speeds. Preference should be given to a 'pull' vs. Fans that move 2000-2300 CFM's are worth the investment. An electric fan is preferred because when you need a fan the most (at idle or cruising speeds) an electric fan is delivering maximum air independent of engine RPMs.

Only choose a mechanical fan over an electric fan if it's your farm tractor. Consider the investment compared to the total cost of the car. Talk with one of our specialists to help you build the system for your vehicle, engine size, and driving habits. Plan adequate space for the cooling system including the radiator, fan, shroud, overflow tank, and mounting brackets. When planning your performance vehicle, remember that you're building it to drive, not to sit and steam. Make room for an adequate cooling system in the design of your engine compartment.įirst things first.

Fan shroud design guidelines