You "can" do it. But I belive you run the risk of fraying the fibers. I think it also depends on the thickness of the clearcoat, and the weave of the fiber.

 

Both my STi and Rx8 have Seibon CF hoods and trunks.
Since they take about 5 minutes to install,I was thinking of modding the older c/f trunk that came on the STi with a Syms replica c/f insert and my in-the-attic stock '05 STi rear wing,for shows. I'd like to order a Do-Luck trunklid for my normal,'sleeper' look-so I have a 'donor' c/f trunk to drill,IF it can be done without f'ing it up.

 

Check my journal (pg 21 or so) for the wing I installed on my carbon trunk. It was not bad at all. My trunk was made with reinforced top area for strength to mount a wing. For the STi wing, I would not be concerned as there are about 17 holes that mount it and it sits flush so no chance of it cracking. I used blue painters tape and then drilled small pilot holes first, then went back and drilled them to size. No fraying issues here.

 

you can look at my journal too, i installed the big ole apr spoiler.
drilling is super easy, i was hesitant about it but all it takes is good measurement, a slow and steady pace and SHARP drill bits (get unitbits too).
use the big blue or green painters/marking 3m tape and mark it on top.
just start drilling very slow with a starter bit that is small, about the size of the first part of the unibit you're using.
go slow, it'll go right through and then switch to the unibit to finish it off to the correct size you need.
after i took off the tape, the hole was so clean and perfect i thought i was a professional.:lol:

then use super glue to put on the threads of the CF/clear coat for protection.

 

Much like anything, I believe a sharp drill bit is in order

 

Like others have mentioned, put painters tape on there and start drilling. Just go slow so you don't crack the CF or the clearcoat.

 

Thanks,great answers.

 

Also, in my experience with fiberglass, its better to use as high a speed as you can (if the holes you need are small enough, use a dremel) since a slow speed is more likely to separate layers of the material. and use a brand new drill bit, and get a new bit at the first sign that the one you're using is getting dull. As mentioned, its important that the bit is sharp.

 

use a sharp drill bit at a high speed. Tape off both the top and bottom of the hole, this will help the weave from getting f*ed up. And use a piece of scrap under the piece you are drilling.

 

yea i may had worded what i said wrong, you want to go slow but have the drill speed like medium to fast.
let the drill bit do the work.