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  • carbon fiber strength

    hey guys... i have a '99 mitsubishi eclipse, and the stock clearance is close to 5"... so needless to say it is very easy to scrape that front bumper of mine unless u are extremely careful

    well i thought of an idea that would help me with this, i could use one of those reverse warning sensors that you could put on the back of ur car to tell u how close you are to a wall when backing up, but mount under the front bumper... this way if anything comes close to the sensor i will know and be able to stop before that wicked SCRAAAAPE...

    I need to know if making a carbon fiber enclosure for this thing would be strong enough to withstand and scrapes or hitting from concrete incase my fott would slip or sumthin... haha

    any help as to how strong this stuff actually is would be great
    Debating on installing a carpc in my Jeep.....

  • #2
    Yup it would be. If you scrape hard enough to damage the CF, you have bigger problems. The trick is how to mount the CF to your car... I think that would be the weak point... I can see a CF enclosure snapping off the car.

    Carbon Fiber, real carbon fiber (think NASA/DoD) is insane... it's like steel that's as light as plastic, it's also NASA/DoD expensive.
    ,./(0)3

    '04 Canyon 4x4 pickup

    [---PC on hold----working on external fiberglass "tool" box---]

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    • #3
      Interesting IDEA. Carbon fiber is strong for its weight. A from impact with the ground would shread the housing to bits.

      I would get some nylon pieces and make a little box out of it.

      My good friends boss put little 1/4 inch pieces of nylon on the bottom part of the nose of his F40 for this very idea.

      Good luck.

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      • #4
        Interesting ^^ I have seen moderate crashes of cars (with mostly carbon fibre body cladding) and the CF is the first to get mangled.

        There would be no advantage to using CF. CF is only good if you need it to be very light. With the size box you are talking about, you might as well make it out of steel

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        • #5
          As is stated above carbon fiber is very strong(strong for it's weight that is), it is not however very abrasion resistant. That's why when a boat builder is going to use it it's often put on the inside of the boat or covered with something else. I see this as a problem for your application. I think the idea of using nylon or perhaps delrin is a good idea. Delrin is easier to machine but is much more expensive. If you want to make it the same way you would with carbon fiber there is a material called Dynel that is much more abrasion resistant.

          Jamestown distributors is a great place to get fiberglass, carbon, dynel or other things like that

          www.jamestowndistributors.com

          McMaster Carr has an amazing selection of stuff including delrin and nylon blocks though they can be expensive

          http://www.mcmaster.com

          online metals is another great place to get metals and plastics

          http://www.onlinemetals.com/

          good luck

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          • #6
            well the main reason i was going with carbon fiber is because its stronger than fibeglass, yet still as easy.... anything that uses the same process as fiberglassing yet is strong enough for this project, or any other option that can be homemade for a decently cheap price would be great
            Debating on installing a carpc in my Jeep.....

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            • #7
              cf

              5"...?!?!? HA!! I wish i had 5 inches clearance.

              If you have never worked with carbon fiber before then you should look into other mediums. Its not easy for a novice.





              If you want to see the rest of my car clearance problems and some of the carbon work i have done check my link...

              My CBCC Car
              The Ultimate CBCC?? (Clean Black Car Club)

              Click here for the Truth

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              • #8
                Originally posted by djXternal
                well the main reason i was going with carbon fiber is because its stronger than fibeglass, yet still as easy.... anything that uses the same process as fiberglassing yet is strong enough for this project, or any other option that can be homemade for a decently cheap price would be great

                If you want to use the "fiberglassing" process I'd recomend you start with layers of plain fiberglass to build your box and then use a layer or two of dynel or kevlar for the outer couple layers to give it some abrasion resistance. If making it light weight is important to you you could replace the fiberglass with carbon fiber but understand that if you're not vacume bagging it the resin is going to weigh more than the glass or the carbon so the benifit isn't likley going to be too significant though the cost difference will.

                As for the kevlar, you probably noticed i didn't recomend it above even though it's more abrasion resistant than Dynel and much more than glass or carbon. I didn't because it is a total PITA to work with. For starters it's very difficult to cut. You need special sisiors (you can get them from Jamestown, see above link) any regular ones dull very quickly. Also you can't sand it. If you do it just gets all fuzzy. So to get a smooth finish you have to vacume bag or apply plastic wrap over it while it cures. For these reasons I'd go with the Dynel instead. Dynel's disadvantage is that it is heavy mostly because it really soaks up the resin. Also it's a little more difficult to work with than glass but not that much.

                I'll bet you could find a lot more info on this topic if you hit a boatbuilding forum, especially one for canoes or kayaks.

                Good Luck

                Comment


                • #9
                  Originally posted by djtrickee
                  5"...?!?!? HA!! I wish i had 5 inches clearance.

                  If you have never worked with carbon fiber before then you should look into other mediums. Its not easy for a novice.





                  If you want to see the rest of my car clearance problems and some of the carbon work i have done check my link...

                  My CBCC Car
                  Dont mind me.... I'm just gonna drool over those pictures for a couple of hours!
                  ----------------------
                  VIA Epia II
                  256MB 266DDR Ram
                  90GB Wester Digital
                  Bluetooth/Deluo GPS
                  Lilliput 7" Touchscreen
                  ----------------------
                  Mazda 6 Carputter > Click Me!

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                  • #10
                    hey djtrickee,

                    where did u get that cf cover in your center console from?

                    or did u make it?

                    is it covering an lcd?


                    thanks.
                    2001 Acura CL traded for a 2006 Subaru Legacy GT
                    7" Lilliput Touchscreen
                    NANO-ITX+m1-atx
                    512 DDRsodimm
                    60g SATA Laptop HD
                    4x Apple DVDslot
                    digimoto OBDii
                    mS GPS
                    mini BT keyboard
                    relocated HU faceplate

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                    • #11
                      CF cover

                      Yea I made it to cover my lilli that is molded into the center console. When i molded the screen into the console i used small magnets about the size of pencil erasers into each top corner. then i epoxied 2 more magnets onto the back of the cf plate. this allows it to "snap" into place and doesnt budge when driving. the magnets that are molded into the console are recessed and bondo'ed and painted. cant tell they are there when the cover is off. then it magically snaps into place! I will try and get some pics of that up this weekend. My digi cam is busted right now, damn surfing trip, lol
                      The Ultimate CBCC?? (Clean Black Car Club)

                      Click here for the Truth

                      Comment


                      • #12
                        Originally posted by djtrickee
                        5"...?!?!? HA!! I wish i had 5 inches clearance.

                        If you have never worked with carbon fiber before then you should look into other mediums. Its not easy for a novice.





                        If you want to see the rest of my car clearance problems and some of the carbon work i have done check my link...

                        My CBCC Car
                        420a turbo, nice, that a hahn kit, star, custom?

                        Comment


                        • #13
                          i work at a mitsu dealer as a tech for 18 years. when the 2 gen eclipse came in it had a plastic protector under the chin. we removed it at pdi (pre delivery inspection). and reinstalled the bolt. depending on the color of you car i have seen many ways to protect it .the best was also the easiest. get bulk raditor hose ,the 3 inch stuff. cut lenth wise ,drill in 6mm holes to match the mounting under the nose . bolt it up and you are done. you will need to make sure that it stay tight to the body so that air dosent pull it down at high speed.

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                          • #14
                            I install those reverse sensors where I work. With them on the lowest sensitivity even its going to be hard to "point" them. Too high and it will only beep when you have someone or something in front of you (approx 3 feet). Too low and it will beep on everything. You would be better off with a camera mounted under the bumper than a set of those sensors.

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                            • #15
                              Originally posted by DSM97RS
                              420a turbo, nice, that a hahn kit, star, custom?
                              very similar car to the one I've been looking after and tuning for a friend.



                              '99 GSX... Turbonetics turbo 60 trim... 22 psi. many smiles.

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