| OB2 | 09-21-2004 07:56 AM |
C/F hood
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I want to buy VIS Racing Carbon Fiber Hood, do you realy think it will worth it??? Is it realy wheight saving. What is the best model can I buy!!!
| Turbotegra | 09-21-2004 08:18 AM |
I'll let you know if it's worth it when mine comes in. I just ordered a VIS hood yesterday on ebay.
| MikalsWRX | 09-21-2004 09:39 AM |
If you got a dry C/F hood then yeah, those are really light. The only thing is, they look dull and faded. Good luck Mikal
| 04 Rex in DE | 09-21-2004 10:04 AM |
so are all VIS hoods dry? Who makes wet ones?
| pm6825 | 09-21-2004 11:52 AM |
I don't have a ViS hood on my STi, but I do have one on my Integra GSR and I have to say that they never fit right. You have to install your old weather stripping on them and they don't sit nice and flush.
| Dingo3243 | 09-21-2004 12:08 PM |
[QUOTE=pm6825]I don't have a ViS hood on my STi, but I do have one on my Integra GSR and I have to say that they never fit right. You have to install your old weather stripping on them and they don't sit nice and flush.[/QUOTE]
I have a VIS on my STi and it fit perfectly. I don't have a dry one so I didn't really save any weight. They are more or less for the bling factor. No real weight savings unless you get true carbon fiber ones which are like $800. i think the VIS is like $450...?
I have a VIS on my STi and it fit perfectly. I don't have a dry one so I didn't really save any weight. They are more or less for the bling factor. No real weight savings unless you get true carbon fiber ones which are like $800. i think the VIS is like $450...?
| MikalsWRX | 09-21-2004 01:58 PM |
[QUOTE=04 Rex in DE]so are all VIS hoods dry? Who makes wet ones?[/QUOTE]
No, Im saying if you get one. VIS and Seibon are really good companies and all there hoods fit really well. Some cheaper companies have fitment problems cuz they keep using the same mold for every hood. This causes them to warp after a while. Mikal
No, Im saying if you get one. VIS and Seibon are really good companies and all there hoods fit really well. Some cheaper companies have fitment problems cuz they keep using the same mold for every hood. This causes them to warp after a while. Mikal
| Nytmare | 09-21-2004 04:59 PM |
[QUOTE=Dingo3243]I have a VIS on my STi and it fit perfectly. I don't have a dry one so I didn't really save any weight. They are more or less for the bling factor. No real weight savings unless you get true carbon fiber ones which are like $800. i think the VIS is like $450...?[/QUOTE]
Pics? :banana:
Pics? :banana:
| Drowner | 09-21-2004 06:32 PM |
whats the difference between wet and dry, and while we're at it, hwo do these things hold up in the winter time. im talking new england winters.
| MikalsWRX | 09-21-2004 09:21 PM |
[QUOTE=Drowner]whats the difference between wet and dry, and while we're at it, hwo do these things hold up in the winter time. im talking new england winters.[/QUOTE]
This is Dry. No clear, no gel no uv protection. Light as hell but hard to keep up. The Wet CF is like your stock hood, gel, clear coats and uv protection. Mikal [IMG]http://www.bulletproofautomotive.com/pics/124.jpg[/IMG]
This is Dry. No clear, no gel no uv protection. Light as hell but hard to keep up. The Wet CF is like your stock hood, gel, clear coats and uv protection. Mikal [IMG]http://www.bulletproofautomotive.com/pics/124.jpg[/IMG]
| TVA | 09-22-2004 12:13 AM |
Wet Vs. Dry refers to the way in which the hood was composed. Dry layup is a expensive process that yields a very strong product (read higher tensile strength than steel) that remains very light. Dry layup carbon fiber also tends to be ENTIRELY made up of carbon fiber. The process (I'm abbreviating obviously) is as follows. A sheet of carbon fiber material is impregnated with a resin to the point of saturation. This sheet is then molded to whatever shape one wants it to be and allowed to dry. The process is repeated until the product is as thick as it needs to be and the layers of CF are bonded together with said resin under compression. This completes the process of dry layup. It is very time consuming and expensive, but as I said, yields a very strong, light product. Wet layup is entirely different. Most often wet layup products involve a single layer of carbon fiber material laid over a skeleton (often fiberglass or something of the like). The carbon fiber is then doused in a resin, allowed to dry, and clearcoated. This process is much quicker, much less expensive, and yields a product that is as strong as its weakest link (the resin, the skeleton, whatever). It is also much heavier then the dry layup process for obvious reasons. That being said I have a wet layup VIS hood for my MY02 RS. The fit is wonderful and it was a weight savings over my factory steel hood. Sorry for the long post, hope I offered a bit of clarification.
TVA
TVA
| MikalsWRX | 09-22-2004 02:51 AM |
[QUOTE=TVA]Wet Vs. Dry refers to the way in which the hood was composed. Dry layup is a expensive process that yields a very strong product (read higher tensile strength than steel) that remains very light. Dry layup carbon fiber also tends to be ENTIRELY made up of carbon fiber. The process (I'm abbreviating obviously) is as follows. A sheet of carbon fiber material is impregnated with a resin to the point of saturation. This sheet is then molded to whatever shape one wants it to be and allowed to dry. The process is repeated until the product is as thick as it needs to be and the layers of CF are bonded together with said resin under compression. This completes the process of dry layup. It is very time consuming and expensive, but as I said, yields a very strong, light product. Wet layup is entirely different. Most often wet layup products involve a single layer of carbon fiber material laid over a skeleton (often fiberglass or something of the like). The carbon fiber is then doused in a resin, allowed to dry, and clearcoated. This process is much quicker, much less expensive, and yields a product that is as strong as its weakest link (the resin, the skeleton, whatever). It is also much heavier then the dry layup process for obvious reasons. That being said I have a wet layup VIS hood for my MY02 RS. The fit is wonderful and it was a weight savings over my factory steel hood. Sorry for the long post, hope I offered a bit of clarification.
TVA[/QUOTE]
Isnt that what i said :D I like the way you put it though. Kool. Mikal
TVA[/QUOTE]
Isnt that what i said :D I like the way you put it though. Kool. Mikal
| Dingo3243 | 09-22-2004 08:04 AM |
[QUOTE=Nytmare]Pics? :banana:[/QUOTE]
How do I upload a freakin picture!? :furious: :lol:
How do I upload a freakin picture!? :furious: :lol:
| humara | 09-22-2004 12:12 PM |
hood
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The stock aluminum hood absorbs a substantial amount of energy during a frontal crash. The carbon fiber hood will shatter upon impact in a frontal crash and more energy will be transferred to the the cabin. So, with virtually no weight savings and no added functionality, the point of a CF hood is what again?
| AspWhtRex | 09-22-2004 12:35 PM |
actually a cf hood will not shatter in a frontal crash, I had a cf hood on my accord and rear ended someone, The hood did not shatter at all it actually went back to its shape again, But the fiberglass skeleton was damaged. Fiberimages has a few pics of their hood from wrecks and all they were was just scratched up.
VIS hoods are good quality, But there really isnt any benefits of having a cf hood versus to oem wrx hood, BUt if you like the look of CF then by all means get one and vis is nice quality
VIS hoods are good quality, But there really isnt any benefits of having a cf hood versus to oem wrx hood, BUt if you like the look of CF then by all means get one and vis is nice quality
| MikalsWRX | 09-23-2004 07:20 PM |
[IMG]http://www.cirocom.it/curriculum/immagini/dsc_0022.jpg[/IMG] :D
| dkl | 09-24-2004 12:06 AM |
Nice
| Scotts Automotive | 09-24-2004 04:57 AM |
Its also worth pointing out that dry or prepreg carbon is vacuum bagged between each 'layer' to get rid of all the air, then the best stuff is autoclave cured.
| wrx plus | 09-24-2004 05:52 AM |
OB2- if you like the look then go for it, however the stock aluminum hood is lighter.
| MikalsWRX | 09-24-2004 07:50 AM |
yes the stock hood is lighter then the wet CF. But the Dry CF weighs like 4 pounds. Mikal
| jimbobrand | 09-24-2004 11:35 AM |
I really like my seibon CF ver.2 hood and I weighed it vs the oem aluminum and it came in about 2.5 lbs lighter (might be because of the vents). It fit great and dosn't look bad.
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25239.jpg[/IMG]
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25241.jpg[/IMG]
-Jim
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25239.jpg[/IMG]
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25241.jpg[/IMG]
-Jim
| fukamoto | 09-24-2004 03:25 PM |
i want the VIS cf trunk but i heard bad thnigs about it :(
| FortyTwo | 09-24-2004 04:10 PM |
[QUOTE=fukamoto]i want the VIS cf trunk but i heard bad thnigs about it :([/QUOTE]
Bad things like what? I'm thinking of ordering one and would like to know of any problems.
Bad things like what? I'm thinking of ordering one and would like to know of any problems.
| jimbobrand | 09-24-2004 07:12 PM |
VIS is known to have quality control problems like fitment, and I know that every company has their problems but I personally have heard more about VIS than some of the others. I haven't heard many about their hoods but trunks and hatches i've heard quite a few.
-Jim
ps: please don't think that I'm bashing VIS just pointing out something to watch for.
-Jim
ps: please don't think that I'm bashing VIS just pointing out something to watch for.
| Whiplash | 09-24-2004 07:17 PM |
I had a ViS hood on my GC. I was never truly happy with it. The fit was ok.. but the finish.. not so good.
| Wayne_Coots | 09-25-2004 12:50 PM |
I have a 93 impreza sedan and am looking at getting a CF hood and trunk but I havn't decided on a company yet. I've heard some good things about GTP. I have looked at going with the factory aluminum peices but there are some things I am concerned about. First off, I am doing an STi conversion and am converting the front end to an STi V6. I don't want a lot of attention from the ticket addministrators, so I am painting the car flat black and do not want a wing on the trunk unless I visit the track. So I would use the aluminum trunk for the wing and a CF for daily driving so I don't have any holes to fill. as for the hood I need somthing that will let me use the factory intercooler seal and diffuser, stand up to daily use i.e. not dent very easily, and not break the bank to acquire.
| TVA | 09-25-2004 07:05 PM |
[QUOTE=Scotts Automotive]Its also worth pointing out that dry or prepreg carbon is vacuum bagged between each 'layer' to get rid of all the air, then the best stuff is autoclave cured.[/QUOTE]
I missed that part, good call! Thanks.
TVA
I missed that part, good call! Thanks.
TVA
| subiekid | 09-25-2004 07:12 PM |
[QUOTE=jimbobrand]I really like my seibon CF ver.2 hood and I weighed it vs the oem aluminum and it came in about 2.5 lbs lighter (might be because of the vents). It fit great and dosn't look bad.
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25239.jpg[/IMG]
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25241.jpg[/IMG]
-Jim[/QUOTE]
that thing is just nasty.
:rolleyes:
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25239.jpg[/IMG]
[IMG]http://www.digistash.com/data/d37124c4c79f357cb02c655671a432fa/full_2725_p25241.jpg[/IMG]
-Jim[/QUOTE]
that thing is just nasty.
:rolleyes:
| Turbotegra | 09-28-2004 06:00 AM |
Just got my VIS hood today but it didn't come with a latch! No matter how much I play around with it, one of the holes for the hinge won't line up very well either. Everything else looks pretty good and this thing feels like its half the weight of the stock hood.
| Wayne_Coots | 09-28-2004 07:46 AM |
VIS should be around 14lb's
Aluminum 15lb's
stock 36lb's
Aluminum 15lb's
stock 36lb's
| Diversion | 09-28-2004 09:35 AM |
[img]http://diversio.home.comcast.net/bling.jpg[/img]
This is my no-name brand wet CF hood.. it's terrible.. it looks good from a distance, it has a lot of imperfections in the lay up close. And it flutters up and down at over 70 mph.. I paid $350 for it last year.. I have no idea how to keep it from fluttering.
Jay
This is my no-name brand wet CF hood.. it's terrible.. it looks good from a distance, it has a lot of imperfections in the lay up close. And it flutters up and down at over 70 mph.. I paid $350 for it last year.. I have no idea how to keep it from fluttering.
Jay
| jimbobrand | 09-28-2004 10:02 AM |
The fluttering is normal since the CF is not as rigid as the aluminum but you get used to it with time. But the first time you drive it nd it flutters you damn near **** yourself.
-Jim
-Jim
| Nasiocks | 09-28-2004 10:15 AM |
I don't think it's much of a weight reduction since the stock hood is alluminum. The Trunk would help more.
| LyveWRX | 09-28-2004 10:58 AM |
just cause there is tons of misinformation on the web here are some real answers to composites questions:
Dry- IE prepreg as in pre-impregnated.. Carbon fiber matte is impregnated with an epoxy resin, then laid over the mold, then heat and compression are used to cure teh resin, the heat causes a X-linking reaction, while the pressure forces excess resin from the composite. This is the best way to make any composite although it is really expensive.
Wet- As in wet Layup.... The carbon fibre is cut and laid out on a mold. Depending on layup direction and laminar construction this may start with the gel coat, or the underside. The resin and activator (usually an oxidizer) are mixed in the proper ratio, which begins the X-Linking reaction. This whole process is usually performed at room temperature. Teh fiber starts dry and must be sturated with resin, then as it is laid into the mold the resin is pushed so that it completely saturates the fibres. Any excess is pressed out as much as possible. After all the layers required are placed onto the mold it may be vaccumn bagged in order to draw the most amount of resin out of the composite.
Dry prepreg creates the best weight to stiffness ratio, and can if designed properly creat a great weight to strength ratio. Wet is easier and cna be tailored to fit slight changes much easier. Since the usual reaction temp for normal epoxies is ~350F the mold for wet can be plastic.
The properties of composites are dependant upon the fibre direction, matrix percentage, and force direction.
For a really long discussion on composite strength see here:
[url]http://www.eng-tips.com/viewthread.cfm?qid=85268[/url]
nick
Dry- IE prepreg as in pre-impregnated.. Carbon fiber matte is impregnated with an epoxy resin, then laid over the mold, then heat and compression are used to cure teh resin, the heat causes a X-linking reaction, while the pressure forces excess resin from the composite. This is the best way to make any composite although it is really expensive.
Wet- As in wet Layup.... The carbon fibre is cut and laid out on a mold. Depending on layup direction and laminar construction this may start with the gel coat, or the underside. The resin and activator (usually an oxidizer) are mixed in the proper ratio, which begins the X-Linking reaction. This whole process is usually performed at room temperature. Teh fiber starts dry and must be sturated with resin, then as it is laid into the mold the resin is pushed so that it completely saturates the fibres. Any excess is pressed out as much as possible. After all the layers required are placed onto the mold it may be vaccumn bagged in order to draw the most amount of resin out of the composite.
Dry prepreg creates the best weight to stiffness ratio, and can if designed properly creat a great weight to strength ratio. Wet is easier and cna be tailored to fit slight changes much easier. Since the usual reaction temp for normal epoxies is ~350F the mold for wet can be plastic.
The properties of composites are dependant upon the fibre direction, matrix percentage, and force direction.
For a really long discussion on composite strength see here:
[url]http://www.eng-tips.com/viewthread.cfm?qid=85268[/url]
nick
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