Looking for some pictures and ideas on building a new shroud. I 'm mostly interested in mechanical setups not electric. Thanks Tom

Here's what I have. The shroud comes from Epoch Engineering in Colo. and it's made to fit a 350 with the stock radiator mounts, and it's made of stainless. I added a little material to it to close in the opening, and I run a Flex-A-Lite 6 blade fan. This combo pulls a lot of air;)

Another view;)

This is the fan I'm runnin;)

Mustard Dog, where is Epoch Engineering located in Colorado? I live in Ft. Collins and I haven't heard of that place. Also, how much was that shroud? Just curious.

Originally posted by ouibus
Mustard Dog, where is Epoch Engineering located in Colorado? I live in Ft. Collins and I haven't heard of that place. Also, how much was that shroud? Just curious.

I'm not sure where in Co. they are, but they also go by T-Rex. Not too long ago there was a thread about rock sliders made by them and the phone number was listed;)

The shroud was $100:)

Here's the number 303-772-7597.
:D

Thanks MD, I will have to give them a call and see where they are located at.

MD,
Thanks for the pics, I just got a howe that is 25 inch and it is to wide for the epoc shroud. Any other pics, maybe with a circle/round style or something plastic at pic and pull. I measured a older dodge truck with a 360 and it looked close.

I have a shroud that I made. All I did was go to my local heating/air conditioning shop and get a piece of flat sheetmetal and a long strip of the same metal. I had them make a circle out of the strip, and I cut a circle on the flat sheet. I then welded the circular strip around the cutout circle. If it is laying flat it looks like a short tophat.
Make the sheet as wide and tall as the four mounting bolts for the radiator are, measure from two edges of the radiator to the center of the fan, mark these on the sheet and you have the center point for your circle opening. Now measure the true diameter of your fan and all I did was add 3/4 of an inch to each side. Take that total diameter and times it by pi (3.14159265359) and you'll have the total length that your strip needs to be. I figured out the width of the strip by measuring from the spot where the sheet lies flat on, to the back of the fan blades.

Go from the center point on the sheet out 1/2 the diameter of your total distance for the circle and mark about 6 points. This gives you where your circle will be. Lay the circle strip on the sheet, line up all of the points with the edge of the circle, mark out the circle on the sheet and cut it out. Weld the circle strip onto the sheet and some sanding and paint and your done.

I made the circle strip that surrounds the fan come towards the engine until the back edge of the fan blades.
You will end up with the little area that the fan does not cover on the finned area covered with flat metal, and the fan will suck air only through the radiator and not just blow around hot air from the engine bay.

My total for everything was $25 bucks, and it only took like 20 minutes to make.

It is basically the same as the one Mustard Dog posted, except it is a flat sheet and the circle strip comes out around the fan, rather than a box that comes around the fan with a circle cut out.

Hopefully after all that typing it makes sense. It won't be as fancy as the stainless one, but for $25 bucks who cares.

Yo Mustard Dog! Are you running a fan clutch with that 6 blade Flex-a-Lite fan? Just wondering, 'cos I just bought a similar fan that says you dont need to use a fan clutch, and I havent run it yet. (the neighbor gets pissy when I fire up the rig - no exhaust system yet!) Tank Q.

No clutch, that fan is so light (like 11 oz) that I don't think a clutch would do anything;)

I did the same thing as noted above. I designed the shroud, mocked it up in cardboard and took it to an HVAC shop to be fabbed. Total cost was $35. It was a quality job with riveted and soldered joints

I did some research, and found the following facts that I included in my design:

1/3 of the blade should be protruding from the shroud.

The last 1" of depth is provided by a ring that is perpendicular to the shroud (increases laminar airflow)

I am running an RV style (fly swatter) flexfan. I also run an electric pusher that helps when idling along the trails. High flow pump and hiflow 190 degree tstat. Up here, the engine runs right around the tstat temp. In CA, it ran 10 degrees above.

HTH,

Jim

I too made a cardboard template of my shroud and took it to a sheet metal shop to be fab'd. Making the template first ensures that your design will fit your application.

Thanks you guys that was just what I needed. The round style is proablly going to work the best with the 25 inch radiator. I need to get my star and post some pics soon. Thanks