Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2127894
08/08/16 02:31 PM
08/08/16 02:31 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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You have to be careful when you order carbon parts. The material costs twice as much, but weighs the same as fiberglass. The ONLY way the carbon hood is lighter, is because there is less of it, because of strength. BUT and here is the tricky part........to lay up the super light weight, super thin carbon stuff, you have to be able to pull a vacuum on the mold to do it correctly and few can do that. Also the "carbon" parts you get from some companies not only weigh the same as glass, they are also not really carbon. They will be glass, with the final layer carbon, to give it the "look".
So if you are looking for a true, super light carbon hood for a 70 GTX, probably not going to find such a thing. If you just want the "look" buy a glass one and have a carbon wrap put on it
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2127943
08/08/16 03:23 PM
08/08/16 03:23 PM
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Joined: Nov 2004
Posts: 6,890 North Alabama
Monte_Smith
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Ok so I'm probably better off sticking with Fiberglass then. Who do you guys recommend for a quality glass hood?
Kevin Glasstek is probably your best choice
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Re: Carbon Fibre Hood?
[Re: Monte_Smith]
#2127948
08/08/16 03:36 PM
08/08/16 03:36 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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When you do the vac on CF there is other stuff that has to be applied so when its vac down it sucks up all the extra reson ... I had to build a big bag to vac it but I screwed up and didnt have my stiffeners on it when I vac it down so I added them after but didnt vac them... I could have gone with 2 layers of CF but I put 3 layers on it.. if done right 2 is plenty... my hood weighs 6#.. my fiberglass one was 17# but that was with the scoop
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Re: Carbon Fibre Hood?
[Re: Monte_Smith]
#2127971
08/08/16 04:09 PM
08/08/16 04:09 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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To give an idea of what NICE carbon fiber weighs. Customer with a Pro-Mod 63 Vette. The nose on those is pretty big. His entire nose and hood, with a 6" cowl and a titanium tree, weighed 11 pounds. Entire carbon bodies from 5 star bodies can weigh as little as 40 pounds Yeah I was listening to yesterdays BS when they were in the rain delay.. and they said about 60# for a funny car body... I still thought that was light... I've always noticed that they always have the big guy open the body after the burn out... but I think thats for height
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2127986
08/08/16 04:36 PM
08/08/16 04:36 PM
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Joined: Jul 2009
Posts: 116 Florida
mack
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My DP Challenger came with a CF hood... About two years ago the scoop came off and it wasn't the hood or the scoop it was the lament that was used to attach.. Anyway, I remember the hood being as heavy as the scoop. I didn't weigh either but they felt the same.. That was close enough for me.. I do know that Mike Pustalny (SP) has CF and Glass hoods for the DP's that want to put them on springs and a hood latch like a normal car and get rid of the 12 fasteners.. He might have an outlet for other CF hoods... Might be worth a call... All he can say is no...
Mack Reeves
SST 2377
FS/D 2377
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2128015
08/08/16 05:35 PM
08/08/16 05:35 PM
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Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
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Bitopia
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Ok so I'm probably better off sticking with Fiberglass then. Kevin I for the life of me can't see how that conclusion could be drawn from the prior replies to you making it. The material costs are indeed higher, the CF, which has already been mentioned, but you need a lot less thickness with CF for equal stiffness, and the extra epoxy cost. There is no gel coat normally with CF. However the actual material costs are only a fraction of the total delivered price, and CF is way worth it weight wise, and does a better jib of retaining its shape in use, then FG/resins. Vacuum bagging any composite part is always preferred, but seldom done with FG. I would not toss the towel in so fast.
Last edited by jcc; 08/08/16 05:36 PM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2128057
08/08/16 06:30 PM
08/08/16 06:30 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Romeo MI
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One thing you will see in fiberglass is that it moves in heat(sun light).. this doesnt happen with CF.. I made my first hood in fiberglass.. it would sag in the sunlight after a few hours... that was the reason I changed over to CF... the hood I have on my Rampage is from AAR in Florida.. nice piece... BUT it still moves in the heat.. I might take a mold off of it and build it in CF.. I'll see within a year.. if it continues to move like it has been I will pull a mold if I can get it back to the proper shape EDIT You would be far better off going with CF... if you can find a shop that has the mold for your hood and your willing to pay the price.... way lighter, way stronger, doesnt move in the heat.... make some calls.... a few questions will tell you if its all cf or over fg... cf has a weight and the reson after vac is almost nothing... just ask the weight of the cloth they will use and if they will vac it down... they dont vac fg
Last edited by MR_P_BODY; 08/08/16 06:41 PM.
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2128217
08/08/16 10:08 PM
08/08/16 10:08 PM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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aotearoa
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If you know someone with a mold, ask if they can do Kevlar. That front clip I posted can be held above my head with just 1 hand. It is so light. If I could tape both my doors n bootlid to it I could still lift it with 1 hand. If you know any boat builders, they could possibly help you.
Last edited by rebel; 08/08/16 10:09 PM.
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Re: Carbon Fibre Hood?
[Re: 604 Hemi GTX]
#2128299
08/08/16 11:30 PM
08/08/16 11:30 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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I'm not saying I don't want cf but if it's going to be 3 or 4 the price of fg and they can't do the cf procedures properly. I'm way further ahead buying a fg hood, so besides cloth thickness and if they vac cf parts what else should I ask?
Thanks Kevin Really nothing other than number of layers and support ribs.. 2 layers is fine if it has good supports and location of them.... and of course price
Last edited by MR_P_BODY; 08/08/16 11:31 PM.
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Re: Carbon Fibre Hood?
[Re: rebel]
#2128308
08/08/16 11:38 PM
08/08/16 11:38 PM
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Joined: Dec 2003
Posts: 22,696 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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I would only suggest Kelvar if one felt part was going to be abused in use, and separating from the car would be a bad thing after contact. In the case of a hood that could be good or bad. Kevlar is not as strong as CF, just a lot harder to separate after failure, where Cf will mainly shatter when it fails. A single layer of Kevlar with the CF is not a bad compromise, I do it often. edited
Last edited by jcc; 08/09/16 11:29 AM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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