Sidethumper

iTrader: (1)

On both of my trans ams 87 and 89 neither have a shroud that encloses the entire radiator.... is this the way they came from the factory? My engine builder wants the entire rad enclosed to get the most out of my cooling.

What is a good after marker electric fan setup that will achieve this using a stock radiator?

novaderrik

i will never understand why people think that it's a good idea to totally enclose the radiator when using an electric fan... unless you put trap door flappers in there that open up when you are going down the road, you are essentially rendering the whole part of the radiator that isn't covered by the fan pointless..

b4ccamaro

I have to disagree with Nova on that. GM vehicles now are totally enclosed now. At least the 98 -02 f bodys and all th trucks from 05 on. Dual fans completely shrouded.

Sidethumper I put the 98-02 dual fans in my 92 camaro and with little modding they fit very very wel. I am happy really happy with them. If your car has dual fans alread, these will even accept your original wiring no modding or wiring required.

I would tell you to look on ebay for a set.

Good luck!

Sidethumper

iTrader: (1)

Thanks guys... I have a single fan right now... I'm in the process of making a shroud for each side using my sheet metal skills. The passenger side turned out pretty good. Maybe I will post a pic.

My engine builder wants it covered. What he wants he gets lol.

Ted Rooney

I've got two fans hope thay work

topradman

Just about any cooling system will benefit from a shrouded fan whether electric or engine drive. I under stand what Nova is saying to a point but have to disagree as well. I think you just have to look at the room you have got to work with and the spacing between the fan blades. If your shroud is flat as a pancake and the fan opening has a large amount of core (over half) that is far away from the fan opening, you can benefit from the trap doors Nova is talking about however, most dual fan set ups cover most of the core area (assuming the fans are large in diameter) to where you would not have to have these air relief doors. I will show you a couple of examples.... The 1st cooling assembly picture is one I built for a Nova LS9 show car. As you can see, there is a big dead spot on the bottom section of the radiator that would have dammed up frontal ram air so I put the relief doors in the bottom. If it had not had this area ( separate core section for supercharger cooler water over air ), the upper portion although flat would have been fine...... The 2nd one is an assembly I built for a roots blown sbc in a 67 Camaro. As you can see, it does not need air relief doors as the blades are very open and the shroud is deeper & tapered to the center on top and bottom....... This 3rd assembly is one I built for a 27 Dodge Brothers Coupe. This one had to be notched to clear steering box and fit was so tight that shroud could only be about 1" thick. With that big dead spot in the bottom for ram air movement I put an air relief door in this as well. If you can make your shroud a little deeper and taper it toward the fan circle, the door becomes far less necessary if at all needed. Thought this might help give you some ideas on shroud design.

topradman

Attachment 264312Here's a few I built with single fans that are tapered to direct air towards the fan circle. Just taper the shroud sides to the center, the top and bottom can be flat as your fan is about the same height as your radiator.

onthedownlow

iTrader: (4)

On a sidenote, Topradman, you got some mad rad skills man wow! Definitely the go to guy for rads and fabricating. Great work, wish you lived closer as I could use your expertise.

TreeFiddy

This is what I found, back when I was trying to overcome my nasty overheating problems many years ago. Cover as much of the core area with fans as you can, then run a full shroud that tapers toward the fans so that all of the core area is contributing to cooling. Made all the difference for me.

Sidethumper

iTrader: (1)

That sure is some nice rad skills you have Topradman. What are you charging to do a radiator/fan setup for my 87? I really like that duel setup in the middle pick above. I want to get a better setup with an all aluminum and nice duel fan. But until funds allow the stocker is going to have to do.

In the meantime here is that pic of mine with the sheetmetal covering both openings, closing the openings defiantly cools faster and better then leaving it open.

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topradman

Thanks man, this is what I do! Been at it since '81 so hopefully have learned a few things.

topradman

Looks like you did a nice job Thumper! If you're serious on me doing something for you, pm me. Most of that stuff in the pics is for pretty serious high end show cars so pretty pricey, especially polished stuff. The sad part is, so expensive yet don't make a lot of profit on this stuff, just like doing it. As you can imagine, can't do it as cheap as mass produced stuff and I can't pay my bills and keep my doors open working for tortillas or rice, however, some stuff I do is off the shelf completes that I just modify to fit the application which helps keep it less expensive. Out of all those pics, I think 1 was an off the shelf modified, the reset were all hand fabricated tanks, side rails, shroud, etc.... Thanks for the compliment.