Fan shroud advise

[John Dol]

As I'm getting to all the finishing details, I was looking around the garage and spotted an unused piece of aluminum. I always considered making a fan shroud. I went to work and fabricated a shroud based on some of the pics I've seen here. When the fan needed to be put on it did not fit all the way down and ended up being about 1 1/2" above the rad. This meant I needed to close that up and after fabrication that looked pretty good. However (surprise surprise) it interfered with the hood. Made a modification that I was hoping would solve it but alas it didn't.
So now I have a dilemma because as I measured the clear space between the fan and the radiator if the fan sits where its supposed to, I only have 3/4" depth for the shroud. That seems marginal at best and I'm not sure that it will created enough flow across the entire radiator. Most shrouds seem about 1 1/2-2" deep.
I pondered cutting the slanted (exhaust) wall to create a pocket for the fan but my power steering rack tubing is right behind there so it will not allow for that.

Was hoping to use the 16" fan to keep cost at bay but may have to go with two smaller fans.


Thoughts...


Thanks,

John

[ricobrafan]

Hello John
Its Chris with the Gen 2 Coupe. I posted a few pictures my coupe which is painted with your original paint scheme. Still at the painter but looks great.
Now onto your problem? are you having an over heating issue? why the need for the shroud? These cars generally have pretty good cooling due to the design of the air entry and exit. I am adding the Russ Thompson front beaded radiator nose. Having had much driving time so I am not sure how much it helps. Enjoy?
Chris

[John Dol]

Little bit warm, plus it will cool better and it also looks better in my opinion
Where did you post the pics? Didn’t see them

Thanks,

John

[ricobrafan]

Any Pics John? They pictures ended in the type65 build tread. Coupe Painted. Enjoy!

[John Dol]

Great looking car Chris!

IMG_3711.jpg
IMG_3704.jpg
IMG_3705.jpg


I made a shroud as mentioned and the fan had to sit above the edge due to the lack of room in the cavity.
Hope it makes sense with the pics.

John

[ricobrafan]

How about a smaller fan. They make some high volume 10"-12" fan that would fit better without having to modify the rest of the step (assuming that you have a fan large than 12", i.e 90-97 mustang). Can't wait to move onto the final assembly.

[Jacob McCrea]

John,

This is not my area of expertise, but I'd think that fan would be like trying to drink out of a straw with a bunch of holes between one's mouth and the drink - the suction is less than ideal due to the air leak. I would think it would be the near-seal between the radiator/shroud/fan combination, rather than the depth of the shroud, that makes the most difference. But I don't know - hopefully someone with more experience will chime in.

I built a similar shroud, with the FFR fan, and it fits with little room to spare at the bottom. I must have that aluminum ducting angled differently.

[i.e.427]

John, You have a couple of options which have already been discussed but here are 2 more. One is to install the fan inside the shroud (if it will fit inside the shroud), it will still move the same amount of air. Or go with a fan that has an integral shroud like this one for a 95 Tunderbird 4.6. https://www.rockauto.com/en/moreinfo...NuK4ILI0D8fVK6

[John Dol]

Jacob,

My final version had the top portion enclosed so there would not be false air. But I had to remove that part as it was interfering. Too bad because that looked good

[John Dol]

I had though about putting the fan on the inside but the shroud is cut out for this set up so I will have to make anew one.
Wasn’t sure if putting it close to the radiator was defeating the purpose.?
Is the rock auto fan for a roadster or a coupe?

Thanks

[i.e.427]

Is the rock auto fan for a roadster or a coupe?

Thanks

I know for sure it fit the Roadster and I thought I saw a few Coupe guys fit the same fan to the F5R Coupe rad. I would need to know the exact dimension of the coupe rad to be sure. Point is, with the dimensions in hand I would go to the pick-a-part and start measuring rad fans. With that info you could go to Rockauto and search by make, model & year and order up a new replacement. That's how I found the T-Bird fan a number of years ago. https://www.ffcars.com/forums/17-fac...r-fan-mod.html

[i.e.427]

Here is a link where Scott uses the same fan for a Coupe.
https://www.ffcars.com/forums/21-ffr...n-upgrade.html