Carbon Fiber Hood Build - Chevelle Tech
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post #1 of 7 (permalink) Old Aug 29th, 19, 8:02 PM Thread Starter
 
Join Date: Aug 2019
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Carbon Fiber Hood Build

I figured I’d start a thread on my attempt at making a carbon fiber hood.

The first step is building a plug. I had to look around a bit to find a flat Malibu hood. I ended up finding one in Asheville for. I ordered an l88 scoop from speedway. I’ll trim the rear of the scoop once everything is glassed in and blocked out.

So far I’ve cut out the hood and mounted the scoop from underneath and started filling with Bondo. I plan to add a set of Shelby style hood louvers as well.
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post #2 of 7 (permalink) Old Aug 29th, 19, 8:41 PM Thread Starter
 
Join Date: Aug 2019
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Once I get this hood blocked out, I plan to paint it with a cheap single stage. Since I’m working under a carport, I’m working against the clock. It needs to be above 70 degrees to make the fiberglass mold. After the top is molded, I’ll need to cut and paint the underside bracing. I’m leaving it intact until the mold for the top is complete to reduce the chance of warping. After the hood is finished I plan to build a plenum and run an l88 vet style air cleaner.
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post #3 of 7 (permalink) Old Aug 31st, 19, 1:55 AM
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Chris
 
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Location: Alberta, Canada
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Re: Carbon Fiber Hood Build

Very interested in this project. Are you doing a wet lay or a vacuum infusion?

1971 Chevelle SS454, T56 Magnum 6 speed, 3.31 Posi

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post #4 of 7 (permalink) Old Aug 31st, 19, 8:50 AM Thread Starter
 
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Quote:
Originally Posted by -SS454- View Post
Very interested in this project. Are you doing a wet lay or a vacuum infusion?
I’m going to do a vacuum infusion so I’ll have to build a flange on the plug for attaching the vacuum film.
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post #5 of 7 (permalink) Old Sep 21st, 19, 1:25 PM
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Nick
 
Join Date: Nov 2014
Location: Canada AB
Posts: 117
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Re: Carbon Fiber Hood Build

Are you going for a pin on or bolt on style? My advice for a bolt on would be to try and wrap the top piece around the bottom, and don't trust panel bond. Might be a little harder to do it for a dry piece though. I lost a windshield on my Pontiac trusting panel bond, not to mention the top went about 40 ft in the air and luckily landed on the road and not on anybody. But also get good hood pins.

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post #6 of 7 (permalink) Old Sep 22nd, 19, 8:49 AM Thread Starter
 
Join Date: Aug 2019
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Yea bolt on with front pins. My plan is to make two molds one for the frame and one for the skin. I’ve been on a work trip for the last 3 weeks so hopefully I’ll make some progress near the end of the month. I’ll have to give some thought on how to mechanically lock the two pieces together.
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post #7 of 7 (permalink) Old Sep 22nd, 19, 11:39 PM
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Nick
 
Join Date: Nov 2014
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Re: Carbon Fiber Hood Build

That is kind of how I did it. I just used my bottom "mold" as the actual bottom piece since it is never seen and would have to sand the edges anyway. Would be a much nicer finish though making a mold then the piece. I would also recommend against using Kevlar weave for any underlay if you were thinking about it. I did it on my first attempt at using CF because I heard that it was good to use. But in reality glass matt is a much better option. And after about a year the hood was getting all these sinking lines in it. And once I cut the top off to redo it, I noticed the bottom layer with the Kevlar was cracked all to hell while the top layer looked fine but just "sunk" into the bottom cracks. So I read up on it and basically the Kevlar was flexing more then the carbon was and causing splits. Because their tensile strengths are quite different. Remade it with glass for some strength and haven't had a problem in over a year. Granted I did not use epoxy resin or a dry setup.

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