I think that having the shroud setup in the front like that might not be as efficient as in the back. Does it work as well? The idea is that with the shroud it pulls from all areas of the radiator vs the localized area of the fan, but I'm not sure if a pusher fan orientation will work the same way, will it?
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1985 325e | M60b40 | Fifty Shades of Bronzit
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Don't want to come across overly critical as I think your build is awesome, and congrats on graduating college! But I think that the current shroud setup isn't going to work as intended unless you put some seals on the sides of it.
With the pusher - the critical thing is to seal the sides of the fan against the AC condenser with some rubber or high temp foam, and then seal around the sides of the AC condenser so that air from the fan is forced to pass through the condenser and the radiator core rather than go around the sides.
If you look at the modern pusher fans that have a shroud, they have slots cut into the shroud with louvres that open at speed to increase cooling on the move. They also have rubber seals that encases the AC Condenser and seals the gap to the radiator. For example here's an e39 one:
Good luck!
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Originally posted by thedivision View PostAwesome writeup. Do you have any pics of the brake linkage to valve cover clearance?
Originally posted by jeenyus View PostI think that having the shroud setup in the front like that might not be as efficient as in the back. Does it work as well? The idea is that with the shroud it pulls from all areas of the radiator vs the localized area of the fan, but I'm not sure if a pusher fan orientation will work the same way, will it?
Originally posted by lukeADE335i View PostDon't want to come across overly critical as I think your build is awesome, and congrats on graduating college! But I think that the current shroud setup isn't going to work as intended unless you put some seals on the sides of it.
With the pusher - the critical thing is to seal the sides of the fan against the AC condenser with some rubber or high temp foam, and then seal around the sides of the AC condenser so that air from the fan is forced to pass through the condenser and the radiator core rather than go around the sides.
If you look at the modern pusher fans that have a shroud, they have slots cut into the shroud with louvres that open at speed to increase cooling on the move. They also have rubber seals that encases the AC Condenser and seals the gap to the radiator. For example here's an e39 one:
Good luck!
I can feel much more air running through the radiator, the fan turns on fewer times and for a shorter duration. I do understand that air takes the path of least resistance and I can tell that air is spreading across the face of the rad and a/c condensor. It also rapidly escapes (with the hood open) out of the gap between the radiator and core support where the late model radiator bracket mounts. (I plan to build a cover that will act as a seal/plug of the hole and also better mount the radiator to the core support.
I did consider adding louvers to the shroud for better cooling, but it didn't seem worth the effort. Do note: I never had problems with the previous no-shroud design. So anything above the previous design is an improvement.
I can also note, if I didn't have an a/c condensor up front, I would have designed the shroud to effectively seal across the outer edge of the radiator. Space is fairly limited up front, so I worked with what I had.
:)
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