does anyone know what is the difference in a 5 blade or 6 blade or 7 blade fan. and what fan came stock on a strait 6 motor
not always...a guy had a 6 blade on and it ran hot...switched to a 4 blade and it cooled down...blade pitch was different. ...:Handshake...
There are fixed fans like the 4 blade fan. Flex fans like most 5 blades. Where the blade is flexible and flattens out as rpms increase. I think the design or theory is that it reduces drag when spun faster? Clutch fans, those that have a thermal clutch. Ford fans also come in different diameters. 17 inches up to at least 18-1/4 inches. Ford installed certain fans based on equipment such as air conditioning, engine size, radiator size, heavy duty or extra cooling, etc. I am just stating general Ford here, I am not schooled in the specific Comet/Maverick parts yet.