| MyScoobie28 | 08-10-2004 09:51 PM |
aluminum v. carbon fiber
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hey could anyone list the pros and cons of aluminum hoods and carbon fiber hoods? i would really want to know the differences between them because i want to get one of them and i want to hear peoples opinions.
| fastsubie | 08-10-2004 10:41 PM |
may I ask for what car?
Fess
Fess
| NeoteriX | 08-10-2004 10:50 PM |
IBTCarbonFiberisHardtoDamage.
| MyScoobie28 | 08-10-2004 10:56 PM |
you see i want to get a carbon fiber hood but then i heard that aluminum hoods are also good and even lighter. could you guys explain the differences and pros/cons? thanks.
| TGC | 08-11-2004 12:17 AM |
carbon fiber burns easily
| satrya | 08-11-2004 12:35 AM |
[QUOTE=fastsubie]may I ask for what car?[/QUOTE]
Perhaps also relevant to that question is whether both the aluminum and carbon fiber are aftermarket or oem. For the my2002+ impreza or my2003+ forester for example, I would guess that the oem aluminum hood available in some versions of the impreza & forester of those years are better than most of the aftermarket carbon fiber hoods.
Reasons:
The aftermarket hoods may not be as well designed as to deform/fail/break in a manner best for safety in a crash. An aftermarket carbon fiber hood with a nice fit and finish and good inner structure would probably be much more expensive than oem aluminum hood.
my 2 cents
Perhaps also relevant to that question is whether both the aluminum and carbon fiber are aftermarket or oem. For the my2002+ impreza or my2003+ forester for example, I would guess that the oem aluminum hood available in some versions of the impreza & forester of those years are better than most of the aftermarket carbon fiber hoods.
Reasons:
The aftermarket hoods may not be as well designed as to deform/fail/break in a manner best for safety in a crash. An aftermarket carbon fiber hood with a nice fit and finish and good inner structure would probably be much more expensive than oem aluminum hood.
my 2 cents
| ethereal | 08-11-2004 02:05 AM |
[QUOTE=MyScoobie28]because i want to get one of them and i want to hear peoples opinions.[/QUOTE]
Your want to buy a c/f or aluminum hood yet you don't even have a car yet?
I think its more of a personal preference, some like the look of carbon fiber and some don't. You can paint either material, but I would have to go the aluminum route.
-Andy
Your want to buy a c/f or aluminum hood yet you don't even have a car yet?
I think its more of a personal preference, some like the look of carbon fiber and some don't. You can paint either material, but I would have to go the aluminum route.
-Andy
| N'CTRL | 08-11-2004 02:32 AM |
Advantage to the cf hood in 'some' cases vs the stock aluminium hood in the WRX is weight. But you have to be careful, sometimes they are heavier, and the lighter ones generally have a weight savings under 5 lbs.
Advantage to the stock aluminium alloy hood is that it disipates the heat better and the car was meant to have it (ie: crash tests, etc.)
Personally, I'd keep the 3lbds extra I'd be saving for the better heat distribution and unecessary cost.
Only other thing I can think of is looks, and that is subjective.
Advantage to the stock aluminium alloy hood is that it disipates the heat better and the car was meant to have it (ie: crash tests, etc.)
Personally, I'd keep the 3lbds extra I'd be saving for the better heat distribution and unecessary cost.
Only other thing I can think of is looks, and that is subjective.
| MikalsWRX | 08-11-2004 09:24 AM |
Ususally the Dry carbon hoods weigh less because they dont use any of the gels. But they always look faded. On the WRX most people do CF hoods for looks since our stock hoods are really light to begin with. laters Mikal
| mrbell | 08-11-2004 12:03 PM |
aluminum isn't the most forgiving if you get hail...(neither is steel, for that matter)
| MyScoobie28 | 08-11-2004 12:08 PM |
i just want to know, why doesnt wrc use carbon fiber instead of aluminum? is it only for the wieght saving or for other purposes?
| gswrx | 08-11-2004 01:14 PM |
Depending on what carbon fiber hood you get there are subtle differences. The most obvious is aesthetically carbon is more desired. Strength and lightness is debatable. In logic carbon is stronger, but some manufacturers will use a carbon overlay and fiberglass base so it defeats the purpose of using carbon fiber. A good hood to use is seibon. It looks good and I have had no problems with it. [url]www.seibon.com[/url]
[IMG]http://seibon.com/Products/CFHood/CFHoodPictures/CFHoodPic_OEM/HD04SBIMP-OE-1.jpg[/IMG]
[IMG]http://seibon.com/Products/CFHood/CFHoodPictures/CFHoodPic_CW/HD04SBIMP-CW-2.jpg[/IMG]
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[IMG]http://seibon.com/Products/CFHood/CFHoodPictures/CFHoodPic_OEM/HD04SBIMP-OE-1.jpg[/IMG]
[IMG]http://seibon.com/Products/CFHood/CFHoodPictures/CFHoodPic_CW/HD04SBIMP-CW-2.jpg[/IMG]
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| MyScoobie28 | 08-11-2004 01:19 PM |
i just want to know, why doesnt wrc use carbon fiber instead of aluminum? is it only for the wieght saving or for other purposes?
| TGC | 08-11-2004 03:29 PM |
probably because they can easliy replace an aluminum hood, fender door, ect. much easier and cheaper than a carbon fiber one. besides the drivers are in a cage so their safety doesn't depend (that much) on the structural integrety(sp?) of the body (note: it depends on teh frame and the roll cage).
i mean would you really want to spend thousands abnd thousands of dollars on carbon fiber parts that get chipped cracked broken every race or alot less on something that can bend and get ripped off and still be fine if needed.
i dunno...this was just a random thought. the WRC cars have alot of give to them when they wreck, unlike F1 cars. just the way it is.
i mean would you really want to spend thousands abnd thousands of dollars on carbon fiber parts that get chipped cracked broken every race or alot less on something that can bend and get ripped off and still be fine if needed.
i dunno...this was just a random thought. the WRC cars have alot of give to them when they wreck, unlike F1 cars. just the way it is.
| ZapZilla | 08-11-2004 04:31 PM |
carbon fiber is expensive and unnessisary in my opinion. The stock aluminum hood is very light and stays very cool. As long there isn't hail or big rocks hitting your hood, the aluminum hood won't dent.
| WRXPRESS | 08-11-2004 05:20 PM |
how much would that hood cost? There aren't any prices on their site.
| wrx112 | 08-11-2004 06:03 PM |
CF. hood you looking at $350-$400+ for a rex. Aluminum if you buy it use no more then $250. They both weight about the same 3lbs wont make much of a significant diff. Aluminum is fixable if the damage is minor. CF is not fixable and it can fade. Yep thats that
mike
mike
| kunfuzion | 08-11-2004 06:32 PM |
well c/f doesn't dent as easily as aluminum does. ever notice what happens when a rock hits your hood at freeway speeds.
jeff
jeff
| ZapZilla | 08-11-2004 07:11 PM |
the CF hoods i've seen are closer to $600
| MattDell | 08-11-2004 07:35 PM |
I've always wondered.. wouldn't plastic be lighter than anything? Why isn't that used?
| kunfuzion | 08-11-2004 07:44 PM |
heat will mold into an engine cover??? :)
| Calamity Jesus | 08-11-2004 07:50 PM |
[QUOTE=TallGuy108]probably because they can easliy replace an aluminum hood, fender door, ect. much easier and cheaper than a carbon fiber one. besides the drivers are in a cage so their safety doesn't depend (that much) on the structural integrety(sp?) of the body (note: it depends on teh frame and the roll cage).[/QUOTE] The hood isn't even a structural member on the street car. The issue with safety regards the way the hood behaves during an accident. The stock metal hoods are designed with little creases in the frame and strong rear hinge points. When you get into a front end collision they are designed to bend upward in the middle. What this does is:[list=a][*]Absorb crash energy[*]Protect the windsheild from flying objects[/list]
A composite hood is not going to bend like metal.. it will either shatter or hold it's shape. Since most aftermarket composite hoods are not mounted as strongly as the stock metal ones, the chances of the hinges breaking is much greater.
If you get into a head on collision and the hood holds it's shape and the rear hinges don't hang on, the hood can potentially come thru the windsheild.
A carbon hood is going to be lighter than an aluminum hood, but the risk isn't worth the few extra pounds... just get a lighter battery.
A composite hood is not going to bend like metal.. it will either shatter or hold it's shape. Since most aftermarket composite hoods are not mounted as strongly as the stock metal ones, the chances of the hinges breaking is much greater.
If you get into a head on collision and the hood holds it's shape and the rear hinges don't hang on, the hood can potentially come thru the windsheild.
A carbon hood is going to be lighter than an aluminum hood, but the risk isn't worth the few extra pounds... just get a lighter battery.
| Calamity Jesus | 08-11-2004 07:51 PM |
[QUOTE=kunfuzion]heat will mold into an engine cover??? :)[/QUOTE]
You mean like those [b]PLASTIC[/b] engine covers? ;)
Plastic that's strong enough (read: 'thick enough') to hold it's shape over that kind of span with 100mph winds hitting it will not be lighter than aluminum.
You mean like those [b]PLASTIC[/b] engine covers? ;)
Plastic that's strong enough (read: 'thick enough') to hold it's shape over that kind of span with 100mph winds hitting it will not be lighter than aluminum.
| MattDell | 08-11-2004 08:02 PM |
But, from what I've read, the STi Spec C Limited uses a plastic hood.
| Calamity Jesus | 08-11-2004 08:04 PM |
[QUOTE=MattDell]But, from what I've read, the STi Spec C Limited uses a plastic hood[COLOR=Red]scoop[/COLOR].[/QUOTE]
fixed.
fixed.
| kunfuzion | 08-11-2004 08:38 PM |
well the hood scoops are plastic. the hood itself wouldn't be able to sustain the constant exposure vs only the hood scoop. thats why some polyurethane spoilers sag after a while.
| Prairie Dawg | 08-12-2004 06:25 PM |
[QUOTE=Beaverboy]You mean like those [b]PLASTIC[/b] engine covers? ;)
Plastic that's strong enough (read: 'thick enough') to hold it's shape over that kind of span with 100mph winds hitting it will not be lighter than aluminum.[/QUOTE]
Actually, there are "plastic" materials which could stand up to that kind of abuse, and come back for more. The problem with high-end "plastics" is they're expensive...more expensive than carbon fiber, or aluminum.
Plastic that's strong enough (read: 'thick enough') to hold it's shape over that kind of span with 100mph winds hitting it will not be lighter than aluminum.[/QUOTE]
Actually, there are "plastic" materials which could stand up to that kind of abuse, and come back for more. The problem with high-end "plastics" is they're expensive...more expensive than carbon fiber, or aluminum.
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