Made An Aluminum Hood For My Hi-Tech Cobra

[Mongoose930]

For those of you who have ever thought about adding an aluminum hood, trunk or doors to your Cobra, I want to let you know about a 4 day class that I took at Pro Shaper Sheetmetal: Pro Shaper Sheet Metal LLC Home - Pro Shaper Sheet Metal LLC

Wray Schelin is the owner of Proshapers and teaches the 4 day class. He is very patient and helpful. The class is limited to 6 students so he has time to help everyone along in their projects. He is a mad man with a ton of energy and the classes start at 9:00AM and end at Midnight or later each day.

When I started this class, I had absolutely zero experience in working with sheetmetal. I could barely use the tin snips and had never even seen a real English wheel before. That being said, at the end of 4 days, I now have an aluminum hood nicely fitted to my Hi-Tech Cobra.

You can see a lot of the process by visiting Wray’s Facebook page:

https://www.facebook.com/people/Wray...00006679607997

Here is the condensed version of what I did:

1. Cut hood frame from fiberglass hood and repaint the frame. In retrospect, I probably should have made a second frame in case the aluminum hood didn’t work out but I just took the plunge…
2. The first thing you need to do is flash the hood frame so that you have somewhere to attach the hood skin. It ends up being just like skinning a door. I used a plastic mallet to bend aluminum sheets over ¾ inch tubing. I used nothing but tin snips, a plastic hammer, a shrinker / stretcher, and a rivet tool to make and attach the 4 pieces of flashing. This is a pretty straight forward process. Nick Acton (Mickmate) helped start flashing the frame the weekend before the class so that I could maximize my time at Proshaper.
3. The next step is to trim and grind the flashing so that it just fits inside of the hood opening. I then use a black sharpie and protractor to scribe the final cut line into the flashing. After that you confirm the gap between the hoop opening and flashed frame and then adjust the height of the flashing so that it aligns with the body.
4. Once you have your flashed frame in place, it is time work on your hood skin. Wray has all of the correct tools and will show you exactly how to make a perfect hood skin on an English wheel. It took me about 15 hours from rough cutting the hood skin to having it rolled to the point where it was ready to attach to the flashed frame. Fortunately I had a couple of willing partners who were taking the class that helped me wheel out the hood.
5. The next step is to lay the flashed frame on the nicely brushed hood, mark a line around the flashing and then tape to the edge of the line. The tape will eventually be your guide for using the tipping wheel to put a flange on the hood skin.
6. After the initial tape line is in place, you add ¾ inch tape all around and then add a second blue tape line. This gives you your first rough cut of the hood skin.
7. I don’t have pictures of the next procedure but you remove all the tape and use a protractor to make and mark your final cut line which for me was a ½ inch from the edge of the blue line. This allows for about a 1/16 inch of hood thickness and a 7/16’s flange once you fold the hood skin over the flashing.
8. Unfortunately I don’t have pictures of this step either but we used a tipping wheel to add a flange to the edge of the hood skin using the blue tape line as our guide. We also used the shrinker to keep the corners correct as we formed the flange around the edge of the hood skin. If you take your time and cut and trim everything very carefully, the flashed frame should drop nicely into flanged hood skin.
9. Again, I don’t have pictures as I was running out of time but the next step is to use a hammer and dolly to bend the hood skin flange over the flashed frame. This is done the same way you would skin a door frame which I have also never done before.
10. Attach the hood to the car, step back and admire your handiwork!!


If you ever thought about adding aluminum panels, I would strongly suggest taking one of Wray’s classes. I am not saying this is easy but by taking the class, you will see that it is definitely achievable.

PS: Tim, one of my classmates, was kind enough to make me a trunk skin while I was working on my hood. Now I just need to flash my trunk frame and I will have 2 out of the 4 panels done in aluminum.