The carbon slicktop thread

[bigjae46]

[QUOTE=Epsilon;n318980]For the curious, just adding BMW M4 F82 stock carbon roof photos since few have seen the underside w/o the headliner:

The E9X M3 also has a spread tow fabric on the underside. From watching a production video, I think they use a 1x1, biaxial layer, some sort of thin core material, biaxial layer and a spread tow on the bottom. Then the underside is a smooth finish since they use a compression mold. Of course, top notch stuff!

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[Epsilon]

For the curious, just adding BMW M4 F82 stock carbon roof photos since few have seen the underside w/o the headliner:

[bigjae46]

Found this rare E46 M3 Vorsteiner carbon roof on the internet that seems interesting and wanted to share. Note that the underside looks like fabric. Is that the biaxial fabric you speak of?

Hard to tell from the pic. Looks like some sort of chop strand veil.

[sasha]

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[Epsilon]

That is odd. When I make my roofs I use a biaxial fabric under the exterior layer which takes care of any voids since the tows are 45 degrees from the outer layer. Then I use a thicker layer on the bottom.

Found this rare E46 M3 Vorsteiner carbon roof on the internet that seems interesting and wanted to share. Note that the underside looks like fabric. Is that the biaxial fabric you speak of?

[bigjae46]

The photos are from the outside. You can see the hole under the sun too.



I have the RKP roof I purchased from IND.


Here's a photo from the inside when sunny out:

That is odd. When I make my roofs I use a biaxial fabric under the exterior layer which takes care of any voids since the tows are 45 degrees from the outer layer. Then I use a thicker layer on the bottom.

[Epsilon]

Is that the inside or outside?

The photos are from the outside. You can see the hole under the sun too.

Epsilon

Which brand roof is this? Aren't these roofs supposed to be made from multiple layers to give it the strength that is required for a structural component?

I have the RKP roof I purchased from IND.


Here's a photo from the inside when sunny out:

[Slideways]

Epsilon

Which brand roof is this? Aren't these roofs supposed to be made from multiple layers to give it the strength that is required for a structural component?

I have seen light shining through the weave on non structural parts such as a CSL diffuser.

Here is the E92 CF roof production video:

[bigjae46]

Are see-through pinholes in carbon roofs or any carbon part expected?

Photos below are exterior shots with a flashlight inside pointed up at my carbon roof. I think nobody notices it because when it comes out of the shop, the headliner is installed.



I also see it on Vorsteiner bumpers:

Is that the inside or outside?

If inside then it might be a polyester core material peeling through. Not really an issue if it is on the inside.

if outside, some pinholes in an unfinished part is normal. Clear coating should fill in the pinholes. The part needs tk be sanded before spraying so the white dots could be dust stuck under the clear coat.

[Epsilon]

Are see-through pinholes in carbon roofs or any carbon part expected?

Photos below are exterior shots with a flashlight inside pointed up at my carbon roof. I think nobody notices it because when it comes out of the shop, the headliner is installed.



I also see it on Vorsteiner bumpers:

[fattycharged]

Jae, ive got a slick top headliner lying around that needs recovering… i won't get around to doing a cf roof anytime soon


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[bigjae46]

Posted a scan of a US slicktop headliner here in case it's useful: https://nam3forum.com/forums/forum/m...897#post317897

Seems like the euro headliner is the same, save for that bump in the middle. If you bring that down to follow the contour of the surfaces next to it, it should be the same.

I could make one if samthejam will sell me his slicktop headliner. The bad news is it has to be destroyed to make a dimensionally correct mold...or at least made to weigh 20x heavier. There are other ways to make the mold without destroying the part but I guess it comes down to the time vs money argument. The cost will be in the mold. Materials would be cheap. A non-gel coated fiberglass part shouldn't cost more than $50-$75 in materials.

[0-60motorsports]

ABS auto body is the only person I will trust for roof work. I purchased a donar e46 m3 because it had the OEM CSL carbon roof on it, Kevin who is the owner of ABS took on the challenge of removing a 15 year appoxyd roof flawlessly without a single crack or chip. Then he prepped it for my LSB CSL car , perfectly removed the windshield and aligned everything to spec. ABS AUTO BODY

Nice brother!

[M3fanatic580]

Carbon roofs look awesome. Sunroof delete if you can afford it is money well spent.

[Arlen4369]

ABS auto body is the only person I will trust for roof work. I purchased a donar e46 m3 because it had the OEM CSL carbon roof on it, Kevin who is the owner of ABS took on the challenge of removing a 15 year appoxyd roof flawlessly without a single crack or chip. Then he prepped it for my LSB CSL car , perfectly removed the windshield and aligned everything to spec. ABS AUTO BODY