I read your earlier post about this as well. It makes a lot of sense to me. I believe a shroud that's too deep will reduce cooling just like you say. I would recommend to MustangMatt to install it carefully (avoiding scratching it or anything) and quickly and be prepared to return the shroud if it doesn't fit the way you describe. The car just might run hotter with a deeper shroud.Ronstang said:Sadly a deep fan shroud is not necessarily what you need. I read a very good article many years ago about fan/fan shroud technology and it was stated that for optimal efficiency the fan blades should be 50% in the shroud and 50% outside the shroud....this is when looking at the edge of the fan blades. I did an experiment and made a simple fan shroud out of aluminum sheetmetal (stop signs). It was merely a circle that covered the fan blade 50% like stated in the article and about 1/4 inch of space all the way around the fan's circumfrence. I installed this on my Shelby which never had a fan shroud and in the Texas summer it lowered my running temps 15 degrees across the board......I consider this a winner!
DukeGnarley said:i don't know, when i got my fan it came with some instructions that said if it is within a certain distance from the radiator, it would work better without a shroud. so i went without one (my fan is about 1-1.5" from the radiator).
DukeGnarley said:i don't know, when i got my fan it came with some instructions that said if it is within a certain distance from the radiator, it would work better without a shroud. so i went without one (my fan is about 1-1.5" from the radiator).
2nd Mustang said:My 67 also doesn't have a shroud. It's a 302, 4 row radiator, 160 thermostat, stock water pump, flex fan, 8 quart oil pan, headers, 4-speed toploader, no power accessories, etc. Here in SoCal, the hottest it ever got was 190 degrees, even with a radiator leak. It usually runs around 175 degrees, so I don't think a shroud is really required in all instances.
WORTH said:It's not a matter of requirement, but if you have a problem it will deffinately help. I live in New England, never gets nasty hot around here, My 70 has a 351W with headers and A/C It's got a 3 row with no shroud and a flex fan, it never heats up. So I obviousy don't need one either, but the people that are having problems will benefit from one.
ratio411 said:That is why the shroud is there.
If the fan is positioned properly on the shroud and the shroud to the radiator... relationship between the fan and radiator is non-issue.
Dave
Very few cars have been made since the 80s with mechanical fans. I'd say that is pretty successful results.cardude said:I have a deep shroud a 4 core radiator, a flex fan and I always heat up at stops even when the temp is in the mid 70 degrees. I was toying with removing the fan all together ang going strictly electric push pull fans. Has anyone done this with successful results?
cardude said:I have a deep shroud a 4 core radiator, a flex fan and I always heat up at stops even when the temp is in the mid 70 degrees. I was toying with removing the fan all together ang going strictly electric push pull fans. Has anyone done this with successful results?
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