Porsche Brembo 996 BBK Conversion-- let's figure out how to fix the dust boots/seals

[Obioban]

Alright, Frenkit/OPS boots survived the 3.5 hrs of torture I put them through at Thunderhill on Monday. Pretty happy with that!

These boots are the only thing I changed since the last track day (which destroyed the GiroDisc boots), but here's a recap of the full setup:

• 996 calipers
• ZCP rotors
• PFC08 pads (at ~40% life left)
• GiroDisc titanium shims
• Bryson brake scoops
• RBF600

Hopefully these survive forever and I never have to swap another set of dust boots on these calipers.

Holy shit! YES!

... I wonder how important the shims are. I'd rather not...

[Obioban]

Mind sharing a link to the exact boots you bought?

[OPS]

Alright, Frenkit/OPS boots survived the 3.5 hrs of torture I put them through at Thunderhill on Monday. Pretty happy with that!

These boots are the only thing I changed since the last track day (which destroyed the GiroDisc boots), but here's a recap of the full setup:

• 996 calipers
• ZCP rotors
• PFC08 pads (at ~40% life left)
• GiroDisc titanium shims
• Bryson brake scoops
• RBF600

Hopefully these survive forever and I never have to swap another set of dust boots on these calipers.

Glad you were able to test them at the track! I would love to say they will last forever but that would not be honest. Silicone, like other components in the braking system, will eventually break down over time and heat cycles. Thats just the nature of the beast. They will for sure outlast anything out there by quite a large margin. AP Racing, Alcon, wildwood, etc all do not have dust boots on their calipers for a reason but that comes with a sharp hit to your wallet!.

Let me know if you all want other kits made up. Frenkit is constantly improving their products which is good in this industry.

If anyone has some 44 dust boots they need let me know as I have extra that I'm giving away (pay for shipping). I would love to have someone with a 36/44 caliper (porsche) put one of Frenkits dust boots along with the ones they have been running just to show the difference in quality. Or anyone with an SRT...

Mike
OPS

[Obioban]

Glad you were able to test them at the track! I would love to say they will last forever but that would not be honest. Silicone, like other components in the braking system, will eventually break down over time and heat cycles. Thats just the nature of the beast. They will for sure outlast anything out there by quite a large margin. AP Racing, Alcon, wildwood, etc all do not have dust boots on their calipers for a reason but that comes with a sharp hit to your wallet!.

Let me know if you all want other kits made up. Frenkit is constantly improving their products which is good in this industry.

If anyone has some 44 dust boots they need let me know as I have extra that I'm giving away (pay for shipping). I would love to have someone with a 36/44 caliper (porsche) put one of Frenkits dust boots along with the ones they have been running just to show the difference in quality. Or anyone with an SRT...

Mike
OPS

Personally, I'd like a kit that is just the dust boots, not the piston seals. Suspect I'm far from alone in that. Stock piston seals last just fine.

[heinzboehmer]

Details on the brake scoops? I feel like I read something else from you about those but can’t remember where or when.

They're 3D printed, Porsche-style, two piece scoops designed by Bry5on. On part goes on the control arm and the other on the dust shield/shock. Dust shield piece needs to be a fairly temp resistant material (mine is PET-CF), but the lower one can be almost whatever (mine is ABS).

More info and files here:

• https://nam3forum.com/forums/forum/m...ge6#post253963
• http://bry5on-nam3forum.sfo2.digital...step_files.zip

Holy shit! YES!

... I wonder how important the shims are. I'd rather not...

We'll have to see how long they last, but so they've beat all the others!

What makes you hesitant to run the shims?

ZCP front rotors are the same width as the Boxster ones, but the ZCP rear rotors are 20mm wide vs the 24mm wide Boxster rotors. Minimum thickness spec from Porsche is 22mm, which means I can run the rear pads to the backing plate with the 1mm shims in place and not worry about popping a piston out. This isn't really what the shims are for, but they do let me sleep a bit better at night.

Mind sharing a link to the exact boots you bought?

I bought two of these, but only used the dust boots: https://www.ohioperformancesolutions...bo-rebuild-kit

Glad you were able to test them at the track! I would love to say they will last forever but that would not be honest. Silicone, like other components in the braking system, will eventually break down over time and heat cycles. Thats just the nature of the beast. They will for sure outlast anything out there by quite a large margin. AP Racing, Alcon, wildwood, etc all do not have dust boots on their calipers for a reason but that comes with a sharp hit to your wallet!.

Yeaah you're totally right. Was probably a bit overzealous with the "forever" comment

I'm just happy that these lasted for more than 1 track day.

Let me know if you all want other kits made up. Frenkit is constantly improving their products which is good in this industry.

Dust boot only kit would be great! I'll have to swap these out at some point, so being able to just buy the dust boots would be nice.

[OPS]

Personally, I'd like a kit that is just the dust boots, not the piston seals. Suspect I'm far from alone in that. Stock piston seals last just fine.

This is the way, When they first contacted me I brought this up. I know we were having the issue of designing a new packaging for just the boots as they ship in the boxes. Let me talk to them again to see what can be done. Would you guys mind if they were loose? It’s just not professional (but im not sure this crowd minds :-)

[Obioban]

This is the way, When they first contacted me I brought this up. I know we were having the issue of designing a new packaging for just the boots as they ship in the boxes. Let me talk to them again to see what can be done. Would you guys mind if they were loose? It’s just not professional (but im not sure this crowd minds :-)

So long as they don't arrive damaged (suspect a zip lock bag would be sufficient for this), don't think anyone cares

[heinzboehmer]

So long as they don't arrive damaged (suspect a zip lock bag would be sufficient for this), don't think anyone cares

+1!

Edit: Terrible picture, but this is how Porsche ships their dust boots, for reference. Porsche parts are the ones under the GiroDisc bags:



Just a regular parts bag with some Porsche branded stuff in there talking about quality or warranty or whatever. Seems professional enough to me.

[SQ13]

I care. Replacement parts for my Porsche calipers deserve the best packaging. Jk I’d be down to buy 2-3 sets…just toss them in an envelope tbh.

[OPS]

Ok met with Frenkit early this morning - they agreed to hear my plan of selling individual dust boots/seals - I need to gather some data and get a plan to present to them. they are used to dealing with large repair facilities at the factories so we are an anomaly to them. I'll start working on it. I'll ask for velvet lined packaging for SQ13... in the meantime I just put in another order as I want to get the 15% tariff instead of the 25% I paid last time!