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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Sat, Feb-15-2014, 05:21:32 AM   #11
Cronenberged
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Default Re: Lang Racings CF roof

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Originally Posted by big_greasy_taco View Post
Did he say specifically what he didnt like about it? I would be curious to know how the stiffness of this roof compares to OEM or Evolve - Also, do you know if he is using Prepeg and an autoclave, or a wet layup?

Glad to see some new manufacturers producing these parts!

I don't want to miss quote Andrew so I'll follow up with him Friday but it's stiff enough to stand on. It's also thicker than the OEM roof so the headliner would have to be custom. It's a wet lay thats vacuum sealed. I'll check and see if he has an autoclave. The goal For the revamped design for my car that we're working on will be thinner and just as stiff.


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Old Sat, Feb-15-2014, 05:22:42 AM   #12
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Default Re: Lang Racings CF roof

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Originally Posted by x Spades x View Post
Seems like there are too mant roof makers now (EVOLVE and CHALLENGE). Can he do E36 roofs, as the E46s seem to be saturated now.

I'm sure if there is a big enough interest like anything an E36 roof is do able.


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Old Sat, Feb-15-2014, 10:07:22 AM   #13
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Default Re: Lang Racings CF roof

I'm not saying an e36 roof won't come to exist, but it is in a bit of a tricky place for that now, market wise. As I see it, there's 3 main e36 owner groups:

1) Trackers, for which a riveted on place to fill the sunroof hole is 98% just as good, 1/30th the price

2) people restoring them, who want everything 100% OEM.

3) people who bought them because they were dirt cheap, and now are having trouble with basic running costs/maintenance

... none of which are ideal CF roof candidates.
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Old Sat, Feb-15-2014, 11:14:43 AM   #14
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Default Re: Lang Racings CF roof

Sub'd in case i ever decide to do this in the future. I know Lang Racing won't put something on the market unless it's quality.
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Old Sat, Feb-15-2014, 02:49:33 PM   #15
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Default Re: Lang Racings CF roof

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Originally Posted by Obioban View Post
I'm not saying an e36 roof won't come to exist, but it is in a bit of a tricky place for that now, market wise. As I see it, there's 3 main e36 owner groups:

1) Trackers, for which a riveted on place to fill the sunroof hole is 98% just as good, 1/30th the price

2) people restoring them, who want everything 100% OEM.

3) people who bought them because they were dirt cheap, and now are having trouble with basic running costs/maintenance

... none of which are ideal CF roof candidates.
Agree.

There was an attempt at a group buy for an E36 cf roof skin on bimmerforum about 2 years ago and the price point was expected to be ~$700 (I assume this meant racer grade aesthetic qualities). A good point that was made is that even with the already narrow market for them it would be illegal in most racing classes.
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Old Sat, Feb-15-2014, 06:48:08 PM   #16
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Default Re: Lang Racings CF roof

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Originally Posted by Obioban View Post
I'm not saying an e36 roof won't come to exist, but it is in a bit of a tricky place for that now, market wise. As I see it, there's 3 main e36 owner groups:

1) Trackers, for which a riveted on place to fill the sunroof hole is 98% just as good, 1/30th the price

2) people restoring them, who want everything 100% OEM.

3) people who bought them because they were dirt cheap, and now are having trouble with basic running costs/maintenance

... none of which are ideal CF roof candidates.
Pretty bang on. With a large proportion of #3. Makes me sad sometimes.
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Old Sat, Feb-15-2014, 08:34:33 PM   #17
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Default Re: Lang Racings CF roof

What is the advantage that Lang Racing will provide over the competitors?
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Old Sat, Feb-15-2014, 10:24:54 PM   #18
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Default Re: Lang Racings CF roof

Give Andrew a call and ask him


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Old Sat, Feb-15-2014, 10:34:01 PM   #19
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Default Re: Lang Racings CF roof

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What is the advantage that Lang Racing will provide over the competitors?
Well the other two are also US made, and all are based on molds of the OE metal roof. So really the differentiating factors will be quality and price.
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Old Sun, Feb-16-2014, 03:45:55 AM   #20
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Default Re: Lang Racings CF roof

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I know Lang Racing won't put something on the market unless it's quality.
Have we met?! You must know me too well.

The story behind this roof is we made it for our race car knowing that we had a little market for it in the local racer community in SoCal so we decided to put a lot of time into making a really heavy mold from my old car which had a steel roof mounted on it with no sunroof. While we were happy with the mold shape and strength we are modifying the outer flanges to make production of parts easier in the future. Our original goal was to make extremely lightweight parts for race cars around here but I realize that the only difference between race car and street car is the fitment and final appearance. Our race car is mostly carbon fiber paneled but we try to be discrete about it in a competition car. Originally I made my roof from 4 layers of carbon and epoxy but it ended up far to light and flimsy. We cut out the roof support stucture that gives the roof some rigidity so I added a foam core to ours and two more layers of carbon. It ended up extremely stiff and still fairly light. I don't think the core will work well for street cars, the overall thickness would have to stay very close to the original steel roof. Which means we just have to use more layers of carbon and maybe a very thin core if anything at all.

We vacuum bag all our parts, no autoclave, that's out of my price range for now. We were trying to come up with a solution for mounting the the original rain gutter to the roof so it wouldn't be necessary to buy the CSL roof trim pieces so that was a bit of a hold up. If we did do anything I think I'd try to offer two prices, one for the racer roof which would probably be a bit lighter or have a core and just have an unfinished top that you could primer and paint. The other version we could have the top be a nice sun resistant clear coat. The only real difference is the attention to making sure that show layer lays down really nice. Also the street car piece might have to be a bit heavier since you wouldn't want the roof to vibrate. The nice thing is we could make them to order however heavy someone might want with 4, 8, 12, or 231 layers of carbon depending on individual needs. It would probably never be a high production part like the other guys can do though, more likely a made to order part for each person.

We make everything here in Irvine, just need to work on production level setup to make things cost effective. I'd want to undercut the other guys on price a bit while producing a part that is equivalent or better in quality. I have never gotten to see the other roofs but our parts would be 100% carbon. One of the reasons I started making my own parts was I was tired of fiberglass core stuff with heavy fiberglass filler and a show layer of carbon fiber.

Anyway, its something I hope to get done soon, its nice to know there might be some interest when we are ready to make them.
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Discussing Lang Racings CF roof in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)