how to make a radiator fan shroud

Select Your Vehicle When wetting out mat with resin, many people work the resin into the mat while it is on the wet out board. - Posted in Speedway employee Tim is installing a 1932 Ford radiator on his roadster. I then spray a coating of polyvinyl alcohol on the waxed surface.

This will be sanded into a radius by hand during the final sanding. )To calculate the area that is covered by your fan, use the formula below. that the naked eye can't see including a mysterious orange reflection. soaked with resin. Answer:Without a shroud the only part of the radiator that would work at idle (speed under 15 mph) would be the area where the fan … Select Your Vehicle

This will require a secondary lamination to form a return. Notice in the picture how there are some areas of mat that are darker, and have become transparent. How does a cooling system work? I made a roller out of some threaded rod, a file handle and some 1/4" rod.

Pick up the material from the wet out board and apply it to the part. The wax and PVA that were applied to the buck are making it easy to separate the foam from the part.

doesn't stick to it and you can peel it off after it cures. Now that this part is primed with the polyester coating, it can be sanded and top coated with whatever paint system you like. Note how the laminate has a dull finish, with the fibers at the surface, but with no dry areas. One step that I do on these kinds of parts is to paint the buck with resin after shaping it. The first coat will give a carbon fiber finish but will not be strong enough It is very soft and offers little resistance to removal. Then you need to make some pieces to hold the front and rear together. I used 1/8" masonite (sometimes called hardboard) to make the templates. The basic principle is to make a hardboard template of the fan and rad core and stretch material between the two. This will require a secondary lamination to form a return. This foam is available in thicknesses from 1/2" up to 6" thick at any fiberglass supply house. that the first one didn't fit. Fiberglass the material, cut out the hardboard templates and what's left over is your fan shroud - it is actually very easy! I used small pieces typically 4" x 2" rectangles and smaller. I applied two coats of fiberglass matte to the inside of the fan shroud. Fan shroud mounted and working perfectly - just as planned! Just peel the foil layer off. Use a sanding block with 40 grit sandpaper to taper the edges of the plenum box down. Most of it just pops right off, but a blow gun can be used to remove the smaller flakes. Tired of straightening damaged fins or replacing your new race radiator? elastics on the leg and arm openings plus some have a hoody. Cut foam to shape with a handsaw, putty knife, or bandsaw. Evercoat-Fiberglass Co. makes a material called Nothing fancy in the way of spray guns here. - Posted in It is the resin shrinking and pulling the fibers apart that causes that appearance. Upgrade your ride from bias to radial tires and learn how to build your own beadlock rim for your 4x4. Follow his step by step installation guide. helps a lot. You can also use the polyurethane insulating foam that is available from building supply stores. The piece against the fan should be trimmed to the size opening you want. The plywood that is still sticking out from under the foam will be used to form the flat mounting flanges. We'll use a 27” tall universal radiator with a core height 22.25” and a core width 18.25” for this example.Judging from the calculations above, you can see that without a shroud directing the airflow across the entire radiator, you are effectively not using 44% of your radiator. Some shrouds will have small, hinged flaps on the sides of the fan to allow air to push the flap open at speed but NOT allow the fan to suck the flap open to bypass the radiator. Using PVA will make removing the foam much easier after the part is laid up. Cut your material so that you have at least 1" of overlap onto the previously laid up section.

Joined: - Posted in - Posted in The piece against the fan should be trimmed to the size opening you want. Stretch the fabric over the fan template side and staple using 1/4" staples to the front of the rad core template.

There will be an extra layer laminated around all of the edges to make the final part about 0.160" thick. If the binder has dissolved, the mat will just fall apart when you try to pick it up. The first coat of matte was applied horizontally and the second coat applied vertically. Learn how to choose the best radiator for your vehicle. In my case these pieces were wedges since my radiator and motor are not even close to being parallel. (Don't worry, we did it for you! (Keep in mind that styrofoam won't work under any resin with styrene in it, unless you can prevent the resin from contacting it.) I simply tape the top off with some masking tape, then wax the tape with some mold release wax. This is my improved instructions on making a custom fiberglass fan shroud based on the 2 coats of fiberglass resin mixed with hardner coating the fabric Don't do this in your house, or anywhere without adequate ventilation. It also can illustrate how easy it is to use this foam -- it cuts so easily and shapes so well that piecing it up doesn't add all that much time to the project. We are here to tell you: LEAVE it there!You may think that a shroud is a useless piece of plastic or metal, but they really do serve a purpose. I usually stretch the material, and wind up with a section of mat that I can reapply to the stretched, thinned out areas. "Dry" spots will show up as white strands of fiberglass that spring up out of the resin. Notice that there is plenty of clearance between the fan blades