Making a Carbon Fiber Rear Diffuser, Front Splitter - Audi RS3

Website: xfmotorsports.com/
Instagram: / xfmotorsports
E-mail: [e-mail]

[@TylerRogersUSA]

Not sure if I missed it, but what material is that foam? It looks like a great lay up material... No reaction with the epoxy is awesome!

[@RedneckIrishman]

You really should invest in some vacuum bags and a vacuum pump, you can add a gel coat then and really make those parts smooth. You also need a bigger shop, you out grew that place a year ago! You need some bench space man ;)

[@aritrabiswas7827]

Just in time, I was just about to start work on my uni's formula student diffuser!

[@BlogVomMax]

Which team are you? Maybe we see each other in FSG

[@Kishan5]

I always enjoyed your work when manufacturing custom stuff especially carbon fiber bodyparts. Looks awesome.

[@ryancuda45]

can you layup some carbon and epoxy on those stock plastic underside panels and do 2 channels per side directing it to the 4 rear diffuser channels.

[@xfmotorsports]

Not a bad idea. Maybe for the next visit

[@hebe1792]

Very cool stuff. It would be great to post some track results with the diffuser in place.

[@MirchiBoy]

Fully torqued!!!

[@abombs]

Great video!!! Thanks for you’re hard work.

[@rockers2rockers616]

I always enjoy watching someone handbuild performance components for a vehicle. Especially when the component being made has a functional purpose AND is pleasing to the eye. Great video. You need to make yourself a large mobile work surface from plywood supported by carpenters 'Saw horse'. This will give your knees and back a rest. Nice work.

[@williamholmes9129]

Great content and inspiration for my own project 👍

[@yayayayya4731]

Sick as always 🤙

[@mohshinaziz5983]

Good stuff.. you make it look so easy

[@creightonfreeman8059]

Very helpful! I need to do this for a NEDRA car I am building.

[@hydorah]

It's a pity that exhaust rear box hangs so low. I see there's loads of space above it. I reckon it would have been worth the guy having the pipe work refabbed to make that box much higher if he wanted maximum effect - the diffuser throat could have been a lot earlier on the panel if the exhaust wasn't sat there like that - and that big cutout disturbing the airflow could have been avoided

[@hydorah]

What you've done is ace! So much better than the factory fake aero !

[@ananonymoususer7693]

AFAIK factory mufflers are designed to be cooled by passing airflow, hence why they shouldn't be covered by any panels. even on sports cars they tend to have a cutout like he did for those areas.

[@SopelXL]

nice work! thanks for inspiration for my RX-8 ;)

[@timocallaghan4408]

I really like how ground effect works without drastically changing the lines of the car. I was always curious, does the splitter have much effect on the air that passes above it into the engine compartment? Does it not become a bit of an airdam from more effectively catching air and having nowhere to send it?

[@hassanmirza8754]

Finally! We need more content broo

[@redsagan7188]

That’s was an awesome watch !

[@felixs7596]

Awesome work! Love it Wish you could put out more videos. I understand you can't film every though

[@jmyking5]

Great functional diffuser. What is the name of the foam material you used to form the shape of the diffuser and where can I order those?

[@millenniumzeek]

Well I spot an opportunity in your development as a builder and engineer: 3D scanning

[@millenniumzeek]

and great work as usual

[@shazkhan7709]

Awesome content 🇬🇧

[@frederickcook87]

That hole in the front splitter for the diff would benefit from a naca duct…. I’m not sure air will flow smoothly through that square cut box but otherwise great work Bro. I’ll be doing something similar in abs plastic for the rear of my 997

[@mohamedyasinarakkal5130]

You almost at 100K subscribers.

[@gafrers]

Fantastic

[@jaminator190e]

I like this guy ....he works on REAL cars

[@s2000Macedonia]

Wanted to ask..always bugged me.. what happens to the air that's getting trapped behind-above the defuser ...i dont know CFD but i assume it would act as an parachute on higher speeds since there are no openings in the rear fender to release the trapped air..

[@neonnerd1364]

What material did you use for the core? I've been wanting to make a cf diffuser but I can't find something that'll work well enough.

[@101hotwire]

Are you located in the US if so do you mind telling me where you source your foam core from

[@walterhubauer8426]

What kind of foam is this? Does this have a special name or where this can be ordered? Thx

[@Dannerrrr]

no respirator? love those organic gas vapors.

[@ROYteous]

Where do you get those foam panels for the core?

[@drakeperry.]

What kind of foam were you using?

[@pfoxhound]

What about differential? No air flow?

[@Motoinc]

This is where the money is....Making cool carbon parts for RS and M cars

[@seanhiggins704]

where did you find that core material for the carbon?

[@lotuselansteve]

People who sell carbon usually also sell core materials.

[@FullNelsonYT]

What's the actual name of that foam core material?

[@maxgohan]

🤔should we do one for my e93

[@pfoxhound]

How much is such kind of service?

[@zenjamin6262]

I wish I knew what happened with the 560sec that for me was the most exciting build I've seen

[@xfmotorsports]

It's coming alone. Just waiting for the turbo work to be complete and then we will post another video on it

[@zenjamin6262]

@@xfmotorsports love your wideos man keep it up !

[@yordanzhelev6213]

@@xfmotorsports We're is Stefan?

[@redsagan7188]

How much would that roughly cost ?

[@wvuvino21]

I know it’s functional either way but as im 100% sure you already know, a simple running of a Heat gun or torch would’ve helped with those big ugly air bubbles on the top sooo much haha

[@MiniBrothas]

Great work. I've been thinking of doing something like this on my Mini Cooper. Is it possible to cover the exhaust too? Maybe including some cooling vents?

[@sojevic]

If you’re going to get a bit of this type of work, I’d say start looking at a Creaform or Peel 3D scanner.

[@RyanStone143]

Came to say the same thing.

[@D3nn1s]

Not sure thats gonna do alot other than him spending a lot of time. Its very basic shapes and hed have to use some 3d scanner spay on the whole underside of the car

[@sojevic]

@@D3nn1s I’m thinking more of the fact that once he scans an RS3, machines out some moulds for the carbon fibre he can reliably produce great quality carbon fibre diffusers and splitters to sell. More than just the single custom piece.

[@D3nn1s]

@@sojevic ah yes thats obviously true! :)

[@sk8ter4life1]

why did you go with only 4 Splitters on the diffuser?. Would ther be a difference with more or less splitters?

[@xfmotorsports]

They section the air. Without them the air wants to pile up towards the centerline of the car. Adding too many fins also slows the air down due to boundary layer effect. Generally 3 or 4 sections is considered good enough but it really depends on the shape and size of the diffusers

[@anomamos9095]

The diff cooling duct is probably not going to work. If the factory duct forced cool air onto the diff from underneath then the duct you have made probably won’t do that. It will either draw air from the top or have zero air flow.

[@carwerks101]

Any way to test this at home, smoke machine and blower? Would it be beneficial to do a cover over the exhaust too?

[@xfmotorsports]

Aero paint works pretty well for telling if the air is staying attached and direction of flow

[@makombost8140]

With this carbon fiber treatment, is it more cosmetic or does it do anything for the structure of the floor? Maybe makes it more rigid?

[@azargelin]

I would say 0 structure, its supposed to make air go under the car faster which helps alot with down force

[@yayayayya4731]

It is very strong, but the car wont be anymore rigid.

[@erikreeb9829]

Anybody know how get the LMR spoiler?

[@saleelsiddique134]

👏

[@tarekz9992]

Gloves?! Also why not vacuum pack?

[@chadlegault9993]

Where do you buy the foam and carbon fibre from here in Ontario?

[@yayayayya4731]

Online

[@imDnice]

How much to make a small diffuser for a car? I will pay, whats your contact info?

[@garydeandeery]

My rx8 is the same at the back so I’m doing metal hangers

[@Everude3000]

You know what these improvements did to his laptime?

[@albertsandberg]

Flexing the 50-50 weight distribution there are we?

[@leondenhollander7171]

Where is the f1 project?

[@garydeandeery]

Do what I do buy the parts then carbon fibre skinning them it’s hard but worth it

[@jimrrussell8250]

Audi?!

[@SavedbyHim]

Not sure I understand... The underside of a wing produces lift, not downforce. The more air flows under the car, the less flows over producing lift like a wing which is the opposite of what you want...

[@xfmotorsports]

Underside of a car wing (an upside down airplane wing)

[@SavedbyHim]

@@xfmotorsports Thanks for the reply! I love how you're not afraid to take on complex projects, keep it up! :)

[@dubiousmike]

I'm not so sure that a trunk lid mounted wing isn't a joke

[@mohamedyasinarakkal5130]

Upload a new video will you.

[@bl00dh4nd4]

Could the scraps be used to make a forged carbon fiber piece?

[@wvuvino21]

Yes if by “Forged” carbon you mean super excessively thick epoxy coated (heavy af) ghetto chopped strand carbon fiber that’s not actual forged carbon lol

[@bl00dh4nd4]

@@wvuvino21 you can’t deny it looks good

[@conwak4890]

@@bl00dh4nd4 defeats the point of a carbon part though

[@yayayayya4731]

No. But it would look cool tho. Karen did something similar with metal shavings.

[@rimka11]

it would be better to remove all oem nonfunctional crap.

[@D3nn1s]

Love your work and the car, but the front licence plate holder is really throwing me off. Like i get it, he can remove it easily but it just looks dumb as fuck xD

[@heeltoeautomotive4962]

That’s a TCR wing and trunk. Not GT3

[@familiemerk6084]

There is no such thing as a Audi RS3 GT3 This car has the spoiler of the Audi RS3 LMS which drives in the TCR category, its like group 4 or 5 so miles away from group 3 😁

[@synocate5602]

Gloves are like 10$.....

[@1one3_Racing]

Only problem is: DSG farts. They sound SO awful

[@amgonegaming9515]

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