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  #1  
Old 04-26-2012, 01:12 AM
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430 Scud Carbon Diffuser Repair

We were recently contacted by a customer to replace or repair the rear diffuser on his 430 Scud.

Apparently, when an oil change was done, the mechanic forgot to re-install the front bolts. On the way home, the diffuser flopped down and dragged on the ground for some distance until the owner could stop. Let's just say he was going slightly fast!

A new Scud carbon diffuser lists for over $15,000. We don't make a replacement, nor does anyone else that I know of. As the mechanic was paying the bill, and the car is a 'driver', the owner decided he wanted it repaired functionally rather than for the repair to be invisible.

With that constraint, we repaired the rear edge adding new material (fiberglass). The repair was covered with a feathered edge of black paint. Usually, the more 'black' you see on a part means the lower the quality as its used to hide weave issues - so we don't like to do that. But in this case, we had no choice. The other breaks were repaired as well. Then the entire piece was sanded and resprayed.

Three of the fins had been ground down somewhat as well. On those, we finished the sanding that the road had started so that the damage at least blended. Then the remainder of each fin was sanded in preparation for new clear. The fins presented a bit of a problem since the factory finish was so poor. Our first spray was so full of pinholes I almost cried! But after a bit of work we got some pretty good results.

When the customer received the diffuser back, he called and left us a message that he was very angry! After a pregnant pause, he said he was angry because all the other CF on the car now looked like crap! Luckily, no one ever sees a diffuser! Then he ordered a dashboard for his Diablo and made me promise that we'd do some black paint on it!

If you have a damaged CF part, feel free to give us a call to get some advise on repair.

Before Pictures

1) Diffuser as received
2) Close up of left rear edge
3) Close up of right rear edge
4) 'Top' of diffuser
5) Factory pinhole finish on one of the fins
6)Break in upper edge
7) Diffuser cleaned up and dissasembled
Attached Images
File Type: jpg P1560443.jpg (90.0 KB, 264 views)
File Type: jpg P1560445.jpg (111.8 KB, 267 views)
File Type: jpg P1560450.jpg (101.7 KB, 266 views)
File Type: jpg P1560460.jpg (99.4 KB, 266 views)
File Type: jpg IMG_2927.jpg (37.8 KB, 266 views)
File Type: jpg P1560468.jpg (81.0 KB, 266 views)
File Type: jpg P1560479.jpg (96.1 KB, 267 views)
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  #2  
Old 04-26-2012, 01:37 AM
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The After Pictures

So the photos above are before the work.

Now for the repaired diffuser.

Pictures

1) Main diffuser body after repair
2) Rear left corner
3) Rear right corner
4) 'Top' off diffuser. Repaired sections are somewhat visible in this photo.
5) Close up of fin
6) Close up of break repair. If there was one thing I wish we'd had a bit more budget for was to splice a piece of CF over this repair. Or in hindsight, we should have airbrushed it a little.
Attached Images
File Type: jpg diffuser_overall.jpg (69.2 KB, 259 views)
File Type: jpg P1570457.jpg (75.3 KB, 259 views)
File Type: jpg P1570458.jpg (77.0 KB, 258 views)
File Type: jpg P1580149.jpg (118.2 KB, 259 views)
File Type: jpg P1570461.jpg (38.4 KB, 259 views)
File Type: jpg P1570455.jpg (49.4 KB, 261 views)
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  #3  
Old 04-26-2012, 08:06 AM
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Wow, nice work!!
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  #4  
Old 04-26-2012, 09:10 AM
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That's a good result, much better than I would have expected after seeing the damage in the first photo group.
One question, why not make a mould while you're at it? The only after market Diffusers for the Scud are a nasty Chinese fibreglass-carbon fibre mix. Should be a market for a top quality part.
I bought the OEM c/f diffuser for mine; but would have gone after market if there was a decent product out there.
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  #5  
Old 04-26-2012, 10:34 AM
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Cool

Wow great job John ! That's better than OEM.
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Old 04-26-2012, 10:35 AM
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Nice result, but..................
Shouldn't the offending mechanic/shop that was obviously negligent be on the hook for a new part? Don't they have insurance to cover such an incident? The owner let them off easy and they should be thankful.
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  #7  
Old 04-26-2012, 10:57 AM
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John,

That's some amazing work.

It is great to have access to a quality shop working on Carbon Fiber.
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  #8  
Old 04-26-2012, 11:15 AM
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Nice work... your contact info is going in my " Book of Help "

S
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  #9  
Old 04-26-2012, 11:19 AM
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Great work!
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Old 04-26-2012, 12:29 PM
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I've purchased carbon fiber parts from MA and they are of the highest quality. I didn't know they did repairs. I bought a Scud carbon fiber diffuser on Ebay that had been cracked and a couple of fins were scraped. It was off a Scud at an exotic car rental lot. The owner had gotten a new one from insurance and was just trying to get something for the damaged one. The OEM part listed for $14,500. I bought the damaged one and sent it to Speedcraft Composites, a company that specializes in carbon fiber repair. They fixed it including a carbon fiber overlay over the splice and resprayed clear coat and it was perfect. Total cost was $2000.00 for the diffuser and $1500.00 for repair. It's always good to have a couple of reliable names in the Rolodex for unusual jobs.
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Old 04-26-2012, 12:39 PM
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Amazing work! I didn't think a repair like that would be possible with carbon fiber.
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  #12  
Old 04-26-2012, 01:09 PM
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Friend of the Owner

The mechanic was a friend of the car owner so he didn't want to stick him with a giant bill or insurance claim. He is a big believer in what goes around, comes around.
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MAcarbon - Carbon Fiber for Ferrari, Lamborghini and Porsche
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  #13  
Old 04-26-2012, 01:42 PM
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Excellent work
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Old 04-26-2012, 02:11 PM
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Thanks for posting the work that you did. Really looks great.
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  #15  
Old 04-26-2012, 04:38 PM
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Quote:
Originally Posted by John@MAcarbon View Post
The mechanic was a friend of the car owner so he didn't want to stick him with a giant bill or insurance claim. He is a big believer in what goes around, comes around.
I figured there must have been some special relationship...the owner is a very understanding guy.
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  #16  
Old 04-26-2012, 05:05 PM
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Beautiful work. Well done.
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