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  • Testing the difference between OEM Porsche aluminum GT3 wheels and Carbon Revolution carbon fiber wheels on a Porsche 991.1 Carrera S

      • Testing the difference between OEM Porsche aluminum GT3 wheels and Carbon Revolution carbon fiber wheels on a Porsche 991.1 Carrera S

        Published on 09-10-2018 11:25 PM
        15 Comments Comments
        Carbon fiber wheels were once a dream but are increasingly becoming a realistic performance upgrade for enthusiasts as prices drop. It certainly helped that Ford sold the GT350R with production carbon fiber wheels which, yes, Carbon Revolution supplied.


        This test by Motoiq is very well done but it does read a bit like a Carbon Revolution sales pitch.

        What does the average person know? Carbon fiber is light, strong, and expensive. The reason carbon fiber wheels were relatively rare is because not only is the expense an issue but when carbon fiber fails, it shatters.

        Think of breaking glass rather than bending metal. If you bend an aluminum rim, you likely will be in better shape (as will your car) than shattering a carbon rim.

        As Carbon Revolution and Motoiq show, modern carbon fiber wheels are much stronger than their aluminum counterparts:






        Steel can not be beat for stiffness or cost but it is not light. Aluminum we all know well but you will have to sacrifice stiffness to lower weight. There is no way around it.

        Carbon fiber blows the competition away as far as stiffness for the weight of the material.

        Also, keep in mind, aluminum fatigues over time or even over a race. You can lose camber after intense lapping simply due to the metal flexing.


        Ok, we can sit here and look at charts and theory all day. What about some real world testing? That is exactly what Motoiq did at the Las Vegas Speedway Infield Course. Keep in mind this is a tight, short course.

        They picked up a set of OEM 19 inch 997 GT3 aluminum wheels and a set of 19 inch Carbon Revolution wheels. Both sets wore the same 235/35/19 up front and 305/35/19 Pirelli P-Zero Trofeo R tires.



        Weights (in lbs):

        GT3 Wheels
        21.0 front, 26.0 rear

        Carbon Revolution CR-9 Wheels
        17.5 front, 21.0 rear

        Right up front you save seven pounds up front and 10 in the rear.

        How did this work out on the track?


        .38 seconds shaved right off the bat. Not bad, right? Extrapolated out on a larger road course they estimate over a second at VIR. Let's just say saving over a full second just from lighter wheels is well worth it for hardcore track junkies.

        The carbon wheels were easier on the tires too:


        Are these worth it? That depends if $12k for a set of carbon fiber wheels is worth it to you.

        In the next few years we will no doubt see quality carbon fiber wheel options for under $10k.

        Source

        This article was originally published in forum thread: Testing the difference between OEM Porsche aluminum GT3 wheels and Carbon Revolution carbon fiber wheels on a Porsche 991.1 Carrera S started by Sticky View original post
        Comments 15 Comments
        1. Bowser330's Avatar
          Bowser330 - 09-11-2018, 01:16 PM
          great business to get into, I can see carbon fiber wheels becoming more popular among enthusiasts.

          Ford has OEM carbon wheels
          Porsche has OEM carbon wheels

          I can also see 3D printing creating a lightweight wheel once they develop an advanced enough carbon polymer.
        1. Sticky's Avatar
          Sticky - 09-11-2018, 08:54 PM
          Click here to enlarge Originally Posted by Bowser330 Click here to enlarge
          Ford has OEM carbon wheels
          Porsche has OEM carbon wheels
          Both from the same source I believe.
        1. ///M3THOD's Avatar
          ///M3THOD - 09-11-2018, 09:39 PM
          I just read through the MotoIQ article. Certainly reads like a sales pitch, although there is no denying some of the benefits of a CF wheel.

          One point of concern is exactly as you outlined with the failure mode of the CF wheel with a hard impact, the other being, as they did mention in the article, they outrageous replacement costs. You can't really, to my knowledge anyway, touch up a cosmetically damaged carbon wheel.

          Sure it may be road safe, but no one wants to roll around with rashed wheels on their car and painting them kind of defeats the purpose right? If you can't see the carbon weave, is it really carbon?!
        1. Sticky's Avatar
          Sticky - 09-11-2018, 09:41 PM
          Click here to enlarge Originally Posted by ///M3THOD Click here to enlarge
          Sure it may be road safe, but no one wants to roll around with rashed wheels on their car and painting them kind of defeats the purpose right? If you can't see the carbon weave, is it really carbon?!
          Well the finish on the GT350R is not exposed carbon weave from what I understand. Does it matter?

          Probably much easier to touch up.
        1. ///M3THOD's Avatar
          ///M3THOD - 09-11-2018, 09:45 PM
          Click here to enlarge Originally Posted by Sticky Click here to enlarge
          Well the finish on the GT350R is not exposed carbon weave from what I understand. Does it matter?

          Probably much easier to touch up.
          I was only kidding about painting them, but the exposed carbon is probably extremely difficult to touch up since the resins are basically clear showing the fiber structure.
        1. Sticky's Avatar
          Sticky - 09-11-2018, 09:46 PM
          Click here to enlarge Originally Posted by ///M3THOD Click here to enlarge
          I was only kidding about painting them, but the exposed carbon is probably extremely difficult to touch up since the resins are basically clear showing the fiber structure.
          Nobody would know they were carbon fiber but I'd probably just do this finish:

          Click here to enlarge
        1. SpeedLimit?'s Avatar
          SpeedLimit? - 09-11-2018, 11:10 PM
          Aren't HRE wheels this expensive? I saw a video a guy who bought a rs7 at copart and it came with HRE wheels valued around the same amount which he found out from the owner who said they went with the car because they were covered by the policy so maybe you could get these covered by your insurance too.
        1. Sticky's Avatar
          Sticky - 09-11-2018, 11:25 PM
          Click here to enlarge Originally Posted by SpeedLimit? Click here to enlarge
          Aren't HRE wheels this expensive
          No. I paid a little under $2k a rim but you certainly can go a bit cheaper depending on options.

          These will run you $3k a rim.
        1. marcvtec's Avatar
          marcvtec - 09-12-2018, 06:11 PM
          https://www.hrewheels.com/wheels/for...construction=2
          the new stuff at HRE starts at 2,800 each.
        1. Sticky2's Avatar
          Sticky2 - 09-12-2018, 06:54 PM
          Click here to enlarge Originally Posted by marcvtec Click here to enlarge
          https://www.hrewheels.com/wheels/for...construction=2
          the new stuff at HRE starts at 2,800 each.
          Never pay retail...
        1. Eleventeen's Avatar
          Eleventeen - 09-12-2018, 09:18 PM
          These wheels seem to have made a noticable difference, but they would definitely be toward the bottom of my upgrade list if I had $12k to spend on performance mods. Imagine what a difference $12k would make to lap times if you spent it on suspension or engine or brake mods, instead. I guess these are what you buy when you’ve run out of stuff to buy.
        1. Sticky's Avatar
          Sticky - 09-13-2018, 02:20 AM
          Click here to enlarge Originally Posted by Eleventeen Click here to enlarge
          Imagine what a difference $12k would make to lap times if you spent it on suspension or engine or brake mods, instead.
          The guy spending $12k on wheels is not choosing one or the other, he's upgrading everything.
        1. maxnix's Avatar
          maxnix - 01-20-2019, 01:54 AM
          Click here to enlarge Originally Posted by Sticky Click here to enlarge
          Both from the same source I believe.
          I think Porsche makes their own. There is a video of them being made by Porsche Exclusive.
        1. Sticky's Avatar
          Sticky - 01-20-2019, 02:07 AM
          Click here to enlarge Originally Posted by maxnix Click here to enlarge
          I think Porsche makes their own. There is a video of them being made by Porsche Exclusive.
          You're likely right. They don't say what OEM's they supply on their page but only show pictures of Fords running their wheels.
        1. ///MPOSTER's Avatar
          ///MPOSTER - 01-20-2019, 10:36 PM
          I know this is different because of the fire directly heating the carbon fiber but start at 7:30 ish and see them touch the wing and then the body. I assume track heat where the rotors turn red and transfer that to the hub then to the wheel hub could eventually become weak with heat cycles.