Making my own fiberglass cowl hood
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Making my own fiberglass cowl hood
I ordered a 3 and 1/2" cowl scoop from this place http://www.up22.com/scoopw1.htm item #sc-124. It has an inner mounting flange so it will be easier to give it a one piece look. I was going to mount it to my stock steel hood. Then I found another member had a factory fiberglass z28 hood in the for sale section that needs a little work for FREE. I couldn't pass it up. It only cost me gas $ in my truck and just under 4 hours of my time there and back to get it. I had to do something about the ford scoop the previous owner put on it. And a new glass hood is alot of $$$. Also the car will be repainted it's original color in the spring, gunmetal gray. Here is a pic of the hood and a pic of the camaro for now. I will post pics of the scoop after I recieve it, and progrees as I go.
Last edited by 86sc5; 12-19-2010 at 10:15 PM.
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Re: Making my own fiberglass cowl hood
Got the scoop a couple days ago. I started doing some sanding and preping to fill the old pin holes and fix the busted corner. I will use a fiberglass repair kit for this. The scoop is just setting on the hood for test fitting. I still have to cut the air cleaner hole and drill the holes for mounting it. I will be bolting it down and using sikaflex 252 between and around each bolt hole. I will also use the sikaflex to fill the seam on the side of the scoop to the hood. http://www.sikaindustry.com/tds-ipd-sf252-ind-us.pdf We use it to build our fire trucks where I work. I will use fiberglass reinfoced filler to blend the front of the scoop to the hood. So I will not need very much filler.
Last edited by 86sc5; 01-21-2011 at 09:08 AM.
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Re: Making my own fiberglass cowl hood
Got some more work done. I cut out the air cleaner hole and drilled all the bolt holes. Then I glued and bolted the scoop down using loctite. I used nylon washers between the hood and the scoop so the sikaflex would not squirt out. I epoxied both rear coners because one was coming apart. Next I will fix the damage and blend the scoop into the hood.
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Re: Making my own fiberglass cowl hood
I got the old pin holes filled in with some fiberglass and mesh behind the holes. I also put some mesh on the drivers front corner where it was broke and glassed over a couple cracks. And I glassed the front of the scoop to the hood.
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Re: Making my own fiberglass cowl hood
Thanks itsMickey. Atleast 1 person seems interested in it.
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Re: Making my own fiberglass cowl hood
are you gonns box in the air cleaner for a true cowl effect ?
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Re: Making my own fiberglass cowl hood
Yes, I want to keep hot engine air out of the scoop.
This is the new air cleaner assembly going on it. I just have to make up a pan with a seal for it that wont look to tacky.
This is the new air cleaner assembly going on it. I just have to make up a pan with a seal for it that wont look to tacky.
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Re: Making my own fiberglass cowl hood
I like your idea. I have a plain 84 hood that I want to put a cowl on so my breather has more room on my 90. I have the original iroc hood and dont want to cut it up. Where did you get the cowl scoop?
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Re: Making my own fiberglass cowl hood
Yes, it is a urethane elastic adhesive sealer. I will also use it to fill the seam where the side of the hood scoop meets the hood. I will lay a nice bead and then smooth it out. It is sandable and paintable. In the end it will look like one piece. I can actually pic the whole hood up by the scoop.
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Re: Making my own fiberglass cowl hood
Well I'm about done with the body work. It needs some final tweeks here and there and seal the side seam before priming. I need to clean up the underside and get it painted before I put it on the car. More pics.
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Re: Making my own fiberglass cowl hood
I put the air cleaner on to see how it looks. I bought an aluminum 16" pizza pan and cut a 12" hole in the center of it. Then I screwed it to my air cleaner base so the screws would be under the seal on the filter. Then I put a rubber seal around it. I will also put the same type of seal around the hole in the hood so the two will mate together. The hole in the hood is about 15 3/4". The filter is 14". So it should all fit good.
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Re: Making my own fiberglass cowl hood
Sikaflexed the seam between the scoop and hood. Then I sanded the it so I can go over it and the body work with a ppg high build primer.
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Re: Making my own fiberglass cowl hood
it came out nice
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Re: Making my own fiberglass cowl hood
Where did you get that white element filter? That looks awesome.
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Re: Making my own fiberglass cowl hood
Looks allot like a Spectre Power lid with 14"x ? element.=
http://www.spectreperformance.com/#CATALOG.47618
http://www.spectreperformance.com/#CATALOG.47618
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Re: Making my own fiberglass cowl hood
That came out good.
You mentioned working with this sikaflex 252 stuff before. Do you know how it behaves when adhering larger fiberglass parts to metal?
Would you reduce the risk of cracks like you would normally have when using Bondo or some other filler?
I´m asking because I recently got a spare hood, and I´m trying to make up my mind between replacing the whole sheet metal and only keeping the frame, use the sheet metal and stock boltholes to fit a complete fiberglass hood/replacing only the central area of the hood with a fibreglass cowl similar to the Sunoco one/making a steel cowl hood.
My goal is having to do this only once, not finding out the hood shows some hairline cracks where the fiberglass and the sheet metal meet within now and a few years.
You mentioned working with this sikaflex 252 stuff before. Do you know how it behaves when adhering larger fiberglass parts to metal?
Would you reduce the risk of cracks like you would normally have when using Bondo or some other filler?
I´m asking because I recently got a spare hood, and I´m trying to make up my mind between replacing the whole sheet metal and only keeping the frame, use the sheet metal and stock boltholes to fit a complete fiberglass hood/replacing only the central area of the hood with a fibreglass cowl similar to the Sunoco one/making a steel cowl hood.
My goal is having to do this only once, not finding out the hood shows some hairline cracks where the fiberglass and the sheet metal meet within now and a few years.
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Re: Making my own fiberglass cowl hood
Looks allot like a Spectre Power lid with 14"x ? element.=
http://www.spectreperformance.com/#CATALOG.47618
http://www.spectreperformance.com/#CATALOG.47618
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Re: Making my own fiberglass cowl hood
That came out good.
You mentioned working with this sikaflex 252 stuff before. Do you know how it behaves when adhering larger fiberglass parts to metal?
Would you reduce the risk of cracks like you would normally have when using Bondo or some other filler?
I´m asking because I recently got a spare hood, and I´m trying to make up my mind between replacing the whole sheet metal and only keeping the frame, use the sheet metal and stock boltholes to fit a complete fiberglass hood/replacing only the central area of the hood with a fibreglass cowl similar to the Sunoco one/making a steel cowl hood.
My goal is having to do this only once, not finding out the hood shows some hairline cracks where the fiberglass and the sheet metal meet within now and a few years.
You mentioned working with this sikaflex 252 stuff before. Do you know how it behaves when adhering larger fiberglass parts to metal?
Would you reduce the risk of cracks like you would normally have when using Bondo or some other filler?
I´m asking because I recently got a spare hood, and I´m trying to make up my mind between replacing the whole sheet metal and only keeping the frame, use the sheet metal and stock boltholes to fit a complete fiberglass hood/replacing only the central area of the hood with a fibreglass cowl similar to the Sunoco one/making a steel cowl hood.
My goal is having to do this only once, not finding out the hood shows some hairline cracks where the fiberglass and the sheet metal meet within now and a few years.
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Re: Making my own fiberglass cowl hood
I finally got some gray sealer on the hood and put it on the car. Needs a little more work for final fitment, but atleast I got it on so I don't drive around with no hood.
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