The carbon slicktop thread

[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:

[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.

[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:

[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:

[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]

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?

[sasha]

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[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.

[Epsilon]

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

[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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[bavarian3]

Question for everyone here that's installed a cf roof - did you use the oe, or some form of insulation?

I see many here seem to skip it. Wondering if it's worth bothering with.

[0-60motorsports]

Question for everyone here that's installed a cf roof - did you use the oe, or some form of insulation?

I see many here seem to skip it. Wondering if it's worth bothering with.

Used the OE foam. But im sure you can use dynamat for example.....

[bavarian3]

Used the OE foam. But im sure you can use dynamat for example.....

Yeah though dynamat is quite heavy. Just curious if those without it noticed increased road noise. Hard to imagine it does much with how light and airy it is.

[ugaexploder]

Yeah though dynamat is quite heavy. Just curious if those without it noticed increased road noise. Hard to imagine it does much with how light and airy it is.

dynamat makes a few different products including a roofliner. that being said, went with the oe stuff. makes a big difference even just tapping on the roof. would definitely not run it without something to dampen the noise

[Casa de Mesa]

Yeah though dynamat is quite heavy. Just curious if those without it noticed increased road noise. Hard to imagine it does much with how light and airy it is.

OEM is what I went with. If I were going to skip it due to price or availability, I'd go with an adhesive backed melamine foam made for cars. I'd rather absorb the sound than dampen it from above, simply because of the weight.