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

[SQ13]

It’s weird that Girodisc boots are a popular solution for cracking OE boots in the Porsche GT world, but they don’t work in our application. Are the 345mm rotors too small?

[heinzboehmer]

So who's gonna be the test subject for these?

Sounds like it's your turn

Have a fresh set of girodisc boots that I'm gonna swap in before the next track day to try and quantify the effectiveness of the Bryson scoops. If they don't survive, the OPS ones are next on the list.

[Obioban]

So who's gonna be the test subject for these?

[OPS]

First Pistons arrived! I'll get the details up on the web hopefully this weekend..

28/30
28/32
30/34/38
30/32/34
32/32
34/36/38
34/34
36/40
36/44
40/44
44/44

[OPS]

Just the beginning… I just wish we would have kept all of our research back then. good times.

[Obioban]

Nice.

[OPS]

After over four years of searching for a company to produce high-quality alternatives to the brake caliper rebuild scene, We are pleased to announce a partnership with Frenkit S.L. out of Navarra, Spain, who agreed to start a new performance product line to cater to the motorsport community.

At the onset of 2019, continuing well into the COVID era, we began to see the quality control, materials composition, and packaging of “high temperature” caliper rebuild kits becoming subpar. Thus began our mission to find a manufacturer who would produce the products we and the motorsport community needed. Many manufacturers refused to meet with us as; however, in 2021, a company based out of Spain reached out with an inquiry to expand its product offerings in the US market.

All Frenkit Performance silicon boots have a temperature range of -40°C to +300°C compared to EPDM temperature range of -40° to +160°C.

Rebuild kits to include pistons should be here in a week.

Nice to be back.

Mike

[Nate047]

I started going back through this topic from the beginning. For context I followed Ian's link to Ohio Performance Solutions, and it looks like something has changed in the last year. Anyone ever heard of this manufacturer? https://www.ohioperformancesolutions...-rebuild-parts

Someone needs to contact them because they were out of stock for a long time. Not sure if that’s a new/different supplier.

[D-O]

Nobody has heard of Frenkit? If their claim is true 300 C seems pretty stout - how hot do the pistons get?

[D-O]

I started going back through this topic from the beginning. For context I followed Ian's link to Ohio Performance Solutions, and it looks like something has changed in the last year. Anyone ever heard of this manufacturer? https://www.ohioperformancesolutions...-rebuild-parts

[Obioban]

Is this the solution, or have I missed something?

Seems like others have still been having issues.

[D-O]

Update: High temp silicon seals held up!
(https://racingbrake.com/bp-404bs/)

Car was doing double duty, running in instructor and advanced group, back to back, all day. He was not running backing plates.

Disclaimers; 50-60 deg ambient and summit point raceway (not that hard on pads), so not WORST case scenario-- but I'm stoked. Will be installing this winter.

Is this the solution, or have I missed something?

[Slideways]

Do the Porsche guys have this problem? If so, what do they do?

Yes, they either let the dust seals disintegrate or replace with an aftermarket BBK. I think certain GT3s also have this problem - https://rennlist.com/forums/991-gt3-...tive-caps.html

[George Hill]

Do the Porsche guys have this problem? If so, what do they do?

[jager911]

Is the current consensus that there is no boot that will stand up to the heat and I may as well remove them when installing track pads?

Also - how about a recommendation for track pads. First track day in the M3, but I know the Akebono ceramics are not going to cut it.

I'm using Racing Brake gray hi temp silicone boots. Only 2 events on 996 BBK, need to inspect on lift to see how they're holding up. I'm running Pagid Yellow F/R, pleased with feel, progressive bite and modulation coming from PFC.