New:GT4 Essex/AP Racing Front&Rear Radi-CAL Brake Kit and PCCB-sized J Hook Discs! - Rennlist - Porsche Discussion Forums

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New:GT4 Essex/AP Racing Front&Rear Radi-CAL Brake Kit and PCCB-sized J Hook Discs!

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Old 11-30-2017, 10:54 AM
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Default New:GT4 Essex/AP Racing Front&Rear Radi-CAL Brake Kit and PCCB-sized J Hook Discs!

Hello GT4 owners. We have a couple of awesome new brake products that we've been working on that I wanted to share with you. We had a GT4 up on our lift last week confirming all of the data we needed to make these products a reality (A huge thanks to the generous owner who let us borrow it)!




PCCB-Sized Iron AP Racing J Hook Discs GT4 front and rear
The first is our Essex Designed AP Racing 2-piece J Hook discs in the OEM PCCB sizes. We should be shipping these for the GT4 in about 6 weeks. Below is the link to my thread in the 991 GT3 section of the forum. The only difference for the GT4 is the hats:

https://rennlist.com/forums/991-gt3-...ccb-sizes.html

Here they are on a GT3 RS:





Complete front and rear Essex Designed AP Racing Radi-CAL Competition Brake Kit

Some of the goals we outlined at the outset of this project were:
  • Eliminate the need to remove the caliper to change pads
  • Provide durable, ventilated stainless steel pistons (no ceramic piston caps to break) with anti-knockback springs
  • Offer iron J Hook discs with a high vane count, vastly improving longevity compared to the the crack-prone drilled OEM iron units and the fragile PCCB discs.
  • Allow our customers a huge array of pad choice from all major manufacturers
  • Reduce unsprung weight by a significant amount, without the pitfalls of PCCB's
  • Make sure they fit behind OEM wheels without a spacer, and allow for a wide range of aftermarket 19" wheel fitment
  • Maintain the use of the parking brake on the rear kit
You can see many details in this thread:

https://rennlist.com/forums/991-gt3-...t-finally.html

Final product will look something like the pics below, but the discs will be much larger than the ones on our standard 981 kit:
https://s18.postimg.org/vqn0i1mft/IMG_6896.jpg


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AP Racing J Hook Discs and Ferodo Racing Brake Pads for your Porsche
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Old 11-30-2017, 11:00 PM
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Great idea! You seem to be addressing all of the major concerns with the various OEM brake choices.
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Old 11-30-2017, 11:13 PM
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Jeff,

Just like on the GT3 forum you need to offer the option of just getting the calipers for those that already bought your rotors.
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Old 12-01-2017, 01:59 AM
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I still don't understand why Porsche uses those stupid ceramic pucks that crack and why they bridge the caliper so we can't do quick and easy pad swaps anymore.
AP makes solid products.
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Old 12-01-2017, 07:35 AM
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I suspect you can also fit cup car callipers/discs (Brembos) and they will take an 18 wheel which would allow a range a better tyres and slicks. Not applicable in the US though.
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Old 12-05-2017, 12:28 PM
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Originally Posted by ExMB View Post
Jeff,

Just like on the GT3 forum you need to offer the option of just getting the calipers for those that already bought your rotors.
Hi Andy,
We would absolutely love to offer that option, but it's unfortunately just not possible. It would require completely new caliper forgings from scratch. The mounting hole spacing that Porsche uses for their calipers is not consistent with anything in the current AP Racing lineup, and the radial depths of the pads/discs are completely different on the OEM vs. the AP Racing calipers. If there was any reasonable way to do it, we would have already done so.

Great idea! You seem to be addressing all of the major concerns with the various OEM brake choices.
Thank you! Yes, we want to provide a complete solution that eradicates all the hassles and issues that owners face.

I suspect you can also fit cup car callipers/discs (Brembos) and they will take an 18 wheel which would allow a range a better tyres and slicks. Not applicable in the US though.
The cup spindles are likely not the same as the OEM road car spindles. That means the parts aren't interchangeable. That has been pretty standard for Porsche race cars vs. road cars for many years.

I still don't understand why Porsche uses those stupid ceramic pucks that crack and why they bridge the caliper so we can't do quick and easy pad swaps anymore.
AP makes solid products.
Thank you sir! The ventilated stainless steel pistons in our system are much more durable, and we've never had any issues with them under any conditions (including 24-25 hour races).
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Old 12-06-2017, 08:47 PM
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Thanx for the email with the brake parts inspection guide Jeff.

Great customer service.
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Old 12-07-2017, 10:16 AM
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Originally Posted by ExMB View Post
Thanx for the email with the brake parts inspection guide Jeff.

Great customer service.
Glad you enjoyed it! We have a couple other articles/videos that we're talking about doing, that cover similar topics.
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Old 12-07-2017, 01:39 PM
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Alan C.
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Jeff, please PM pricing on caliper/rotor kit.
Thanks, Alan
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Old 12-07-2017, 07:23 PM
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Please pm me on pricing as well. Thanks.
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Old 12-07-2017, 11:05 PM
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Jeff, thanks for the quick response.
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