Custom Center Caps for Porsche Wheel [from CAD, prototyping to finish]

[Nine8Six]

Thanks for reporting, we haven't track them here yet. Shanghai is rain rain and rain for the next month :/ Lucky you bud

Centrifugal force; meaning the faster you go the stronger they clamp. They are rated at 22,000RPM before they 'begin' to explode (according to Nastran). Your track day wheels shouldn't really exceed 3,000RPM so you should be good to go again - and again!

The only problem with these caps imo is the cost of that Acetal. Excellent material but just bloody expansive. Werks... all it matters I guess

[Jgkram]

Well, my two sons surprised me with a set of these beautiful caps. I have been emailing Fred to please make more. Little did I know he and my boys were in cahoots. And he kept the secret beautifully. What a surprise! The caps are absolutely a work of art. If he makes another run I will definitely get another set. It's great to know that my sons went to that much effort and I've also got a little bit of Fred always riding with me. Thanks Fred!!!

[Nine8Six]

Originally Posted by Jgkram

Well, my two sons surprised me with a set of these beautiful caps. I have been emailing Fred to please make more. Little did I know he and my boys were in cahoots. And he kept the secret beautifully. What a surprise! The caps are absolutely a work of art. If he makes another run I will definitely get another set. It's great to know that my sons went to that much effort and I've also got a little bit of Fred always riding with me. Thanks Fred!!!

Haha, great father's day gift!

Your sons chased up that kit for you every single weeks of the development, just so to make sure you get your kit. Cool kids!

Thanks Jim

[kjc2050]

[particlewave]

These sure are nice looking, but I'd never get away with them here.
I have too many gear head friends that would call me a poser for having fake spin locks.

Too bad.

Maybe you should make some flush fit lug bolt hole caps.

[Nine8Six]

Originally Posted by Nine8Six

Adding custom airbrush /w basf chemical coating service, 0.15mm thickness only lol. One color though: 918's Yellow/Green Edition. Identical replica tone; like this little guy here

^ picture this inside a concave black wheel, sporty car... how bloody nice would that be. Insanely cool looking wheel gadgets if you ask me

(psy distress... lolllllllllll)

[Fintro11]

A few people have tried to make comments about them being fake Center caps... but that has come from Honda civics with wings on the back of them. If you like them put them on and don't worry what others think.

Flush lug nut covers would be great though

[Nine8Six]

Originally Posted by Fintro11

A few people have tried to make comments about them being fake Center caps... but that has come from Honda civics with wings on the back of them. If you like them put them on and don't worry what others think.

Oh no no no, those aren't fake my friend. Only very high precision machining! Designed and rated by the most advanced solver known to man kind today also (Nastran/SOL601). A fully matted assembly in those similar tolerances, with two different mat properties would cost you an arm and leg (machining alone). Try to explain this to a civic ricer next time LOL He'll immediately start talking about tomorrow's forecast I promise.

Good feedback none the less. Was actually waiting for these critics to kick in... was getting worried. Time to make more

PS: Kevin, moving this pic across. Could look at this wheel all day long, sorry bud

Originally Posted by kjc2050

[kjc2050]

Originally Posted by Nine8Six

PS: Kevin, moving this pic across. Could look at this wheel all day long, sorry bud

Fred,

Flattered that you like it!!

[Nine8Six]

haha! Yea, good news is I got all the material in hands already + a new batch of the same crests turned up 2~3 weeks ago. Its about time we get a few of those those done. Will be fast this time tough... all the CAM code and fixtures are already done

Just waiting for this silly weather to stop. As soon as we hit in the 28~30degree I'm re-opening the shop bud. Its roughly 40~45dC indoor that shop these days. Although it was pretty cool today (31dC).

Shooting there every evenings in about a week (2 max, I really hope).

[mavis.d]

Originally Posted by Nine8Six

haha! Yea, good news is I got all the material in hands already + a new batch of the same crests turned up 2~3 weeks ago. Its about time we get a few of those those done. Will be fast this time tough... all the CAM code and fixtures are already done

Just waiting for this silly weather to stop. As soon as we hit in the 28~30degree I'm re-opening the shop bud. Its roughly 40~45dC indoor that shop these days. Although it was pretty cool today (31dC).

Shooting there every evenings in about a week (2 max, I really hope).

Put me down for set please

[particlewave]

Maybe just some without the flutes? Just a smooth, round protrusion? I would think they would be easier to machine, too. Just thinking out loud, bud!

Regardless, gorgeous works of art, as always!

[PaulE]

The fit on these caps is so precise you almost need the OEM center-lock wrench to twist them once they are installed, if you don't have them properly aligned with the valve stem! The machining is so crisp I recommend putting a glove on your hand before trying to twist them once installed.

[Nine8Six]

Yea, had to get the p wheel hub mapped in a pretty tight tolerance also. So to prototype this inside Nastran without wasting to much of anyone's time .

Funny bloopers loll Looking again at those source files that acetal part was designed/analyzed/solved and optimized for 1) Clamping/contact force, 2) Centrifugal force, 3) Thermal expansion, and 4) Gravity. All-at-the-same-time. Ran these sims at freezing temp and to 40dC. Thermal stress data (thermoplastics, serious stuff)

The thermal & stress data is also what made this Thermal locking mechanism between the adapter and AL a success (zero Lock-tight!).

The Most Advanced piece of plastic in the World LOL And Paul even discovered its built-in Anti Theft System, fascinating piece of kit

/showoff. attaching the sim model for our cae friends here to enjoy

[Nine8Six]

The clamping time (0.9sec) and the wheel rotating the rest of that sec. Full dynamic sims... time/data fields for centrifugal force... was a cool project these little caps lollll

[Terryg]

Yep fascinating Fred.... yawn!
Sorry. loving mine, they would look great with some projector headlights though Hee hee.....

[Alfieg23]

Hi Fred,

Any news on when the new batch of center caps will be available?

Thanks.

[Troy.Boxster]

Thank goodness you are doing these again! Put me down for a set. :-)

Now, about that SkyBreaker... lol!

-Troy

[Fabio986s]

Hello,
can you please contact me if you have red center lock caps again? would very gladly 1 set!
best regards
Fabio986s

[Alfieg23]

Hi Fred,

Do you have an update on the center caps?

Thanks.