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      05-14-2015, 10:35 AM   #1
jritt@essex
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The Evolution of Brakes:Essex/AP Racing Radi-CAL Pro5000R Comp. Kits, must see!

Hello Gents,
Those of you currently considering other big brake kits may want to hold onto your wallets a bit longer. You're not going to see anything remotely like this elsewhere!

Many of your are likely familiar with our current Essex Designed AP Racing Competition Brake Kits. You can read all about them in this post. We've had great success with those kits, but we've also had some customers asking for something a bit more extreme. Most notably people have asked for a larger disc size on the front kit. We're therefore currently evaluating AP Racing's latest racing Radi-CAL calipers on the e92 M3, mated to larger discs. These kits will represent the bleeding edge of current racing brake technology, and essentially make our competitors' brake caliper designs look and perform like dinosaurs. If you want the best, these are it. You can read about the technology here: "The AP Racing Radi-CAL Story"

We have two kits:

CP9660/372mm

CP9668/372mm



Anyone want to venture a guess about what the most cutting-edge brake technology will cost if you want them on your car? Hint: Most likely less than you're probably thinking right now.

Stay tuned...

Last edited by jritt@essex; 01-29-2016 at 03:14 PM. Reason: updated hyperlink
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      05-14-2015, 12:26 PM   #2
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Pls keep me posted and pm price once you have it.
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      05-14-2015, 01:37 PM   #3
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I'm also interested in a price when it is available
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      05-14-2015, 03:10 PM   #4
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Okay, okay...I don't want to torture you guys. Approximate pricing for the new Radi-CAL systems will only be roughly $500 more than our current front kit. You won't find anything remotely similar in that price range.
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      05-14-2015, 04:59 PM   #5
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wow, very nice. I like how the bleeder/line routing is all internal and there is no external line that run between the 2 halves like all the existing calipers. Will there be a matching one for the rear?

Last edited by e92zero; 05-14-2015 at 05:09 PM.
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      05-14-2015, 06:29 PM   #6
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Wish I would have known about this a few months back. What a game changer!!!
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      05-14-2015, 07:03 PM   #7
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Very nice, Jeff. These calipers are gorgeous. This truly is having your cake and eating it too: A fully functional brake that does the part on the track, and is just as pretty on the eyes as a Brembo brake kit.

How does the weight savings compare to the (original) AP Essex kit?

Quote:
Originally Posted by e92zero View Post
Will there be a matching one for the rear?
Good question! Front and rear or just front?

Also, when is this supposed to be hitting the shelves?
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Last edited by Hujan; 05-14-2015 at 07:42 PM.
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      05-14-2015, 08:12 PM   #8
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Also seeing that the bleeding nipples are on both top and bottom after it's mounted, what would be the procedure in bleeding these caliper once they are mounted or do we have to dismount them to bleed properly?
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      05-14-2015, 09:03 PM   #9
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Those calipers are incredible and the CP9660 caliper is already 1 lb lighter than the currently offered kit. This kit also looks to be a lot lighter vs other Radi-Cal systems sold by other vendors (have reported increase in weight vs stock). Amazing that they fit 18" wheels!
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      05-16-2015, 08:28 AM   #10
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Hi,
Really interested. Can you speak to the caliper depth dimensions with your 380 discs say versus Stoptech ST60? (380mm discs), I am interested in the barrel clearance dimension for my Apex Arc 18 in wheels. Having issues with stones lodging between caliper and barrel and grinding wheel barrel...Maybe i should ride the curbing less

i sure they clear spokes ok, just looking for more barrel clearance.
how soon to availability?
Also, when you say commonly available pad shape, does this match to those for ST60 shape?
Thanks!

The CP9660 is a six piston design that is comparable in footprint to AP's venerable CP5060 Pro5000+ caliper. It is suited to discs of approximately 355-380 x 32-36mm. It takes an 18mm thick, commonly available pad shape. - See more at: http://www.essexpartsblog.com/news/r....qr073PTi.dpuf
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      05-18-2015, 09:49 AM   #11
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Quote:
Originally Posted by Hujan View Post
Very nice, Jeff. These calipers are gorgeous. This truly is having your cake and eating it too: A fully functional brake that does the part on the track, and is just as pretty on the eyes as a Brembo brake kit.
Yes, the calipers are truly mechanical art. When I first got my hands on them at SEMA last fall I was stunned. They look and feel just like the calipers we sell for $5k each. I'll try to do a comparison to the Brembo Mono 6 on our blog, just like I did with the CP5060. Honestly, the Pro5000R's make everything else look ordinary and pedestrian. It's like looking at a current iPhone vs. a Sony Walkman from 1987.

Quote:
How does the weight savings compare to the (original) AP Essex kit?
The 372x34mm discs each weigh roughly 2 lbs. more than the 355x32mm discs in our current kit, but the calipers weigh a bit less than the CP5060. With either of the new six pistons you'll still be shaving something like 14-16 lbs. off nose vs. the OEM setup...huge difference.
Quote:
Good question! Front and rear or just front?
The front system will be introduced first, and can be mated to our existing rear setup. AP is working on a new rear caliper that will be available at some point down the road. I can't give any more details than that at this time.

Quote:
Also, when is this supposed to be hitting the shelves?
It's tough to say, as there are a lot of things up in the air right now. If I had to take a conservative stab at it, I'll say late summer and hopefully over-deliver. We don't take a customer's money and hold them hostage on vaporware, so nobody has to worry about that sort of thing. When the product is designed, tested, manufactured, and assembled, we'll start taking orders and delivering the baddest brake system one can get their hands on.

Quote:
Also seeing that the bleeding nipples are on both top and bottom after it's mounted, what would be the procedure in bleeding these caliper once they are mounted or do we have to dismount them to bleed properly?
You most definitely do NOT need to dismount them to bleed. You only have to bleed the top bleed screw, which definitely simplifies and speeds up the process.

Quote:
Those calipers are incredible and the CP9660 caliper is already 1 lb lighter than the currently offered kit. This kit also looks to be a lot lighter vs other Radi-Cal systems sold by other vendors (have reported increase in weight vs stock). Amazing that they fit 18" wheels!
Yes, these calipers are each about 4 lbs. lighter, and we are definitely planning to put them behind 18's since that's what most people are tracking.

Quote:
Hi,
Really interested. Can you speak to the caliper depth dimensions with your 380 discs say versus Stoptech ST60? (380mm discs), I am interested in the barrel clearance dimension for my Apex Arc 18 in wheels. Having issues with stones lodging between caliper and barrel and grinding wheel barrel...Maybe i should ride the curbing less

i sure they clear spokes ok, just looking for more barrel clearance.
how soon to availability?
Also, when you say commonly available pad shape, does this match to those for ST60 shape?
I hear you on the gravel hitting the caliper issue. I did that several times in my Z06 running the desert tracks in California...tons of gravel everywhere. I actually put a huge gouge in one of my front calipers at Spring Mtn. Nevada, and it scared the heck out of me when it happened!

Okay...you touch on two separate issues here...
Depth/wheel Spoke Clearance
I believe our current CP5060 system offers slightly superior wheel spoke clearance than the StopTech systems. Since the footprint of the CP9660 and CP5060 are almost identical, the CP9660 system would be on roughly the same vertical plane as our current system. It would just sit further out away from the hub. In many cases, that actually improves wheel fitment, since the spokes of most wheels tend to curve outwards as they arc towards the barrel. With the wider CP9668, you lose about 7mm of whee spoke clearance. So if you wanted a good idea of depth/wheel spoke clearance, you could reference our current wheel fitment template.

One of the nice things about the new Radi-CAL's is that since there are no outer bleed screws, the calipers have a nice rounded profile at the corners. That helps with wheel spoke clearance.

Barrel Clearance
Again referencing our current wheel fitment template above, if you extend the length of the template 8.5mm, that would account for the disc diameter difference and give you a pretty good idea of how much room you'll have (355mm ---> 372mm....372-355=17...17mm/2=8.5mm).

Pad shape
The AP Racing CP9660 and CP9668 use the same basic shape as the ST-60, except they have a slightly taller radial depth of D54 vs. a D51 in the ST-60.
(FYI...StopTech is not the originator of the pad shape used in the ST-60, AP Racing actually is. I was Sales Mgr. at StopTech during the ST-60 design process (around the year 2003). We decided to use that particular AP Racing pad shape due to its widespread usage/availability).

To show the pad issue visually...you can reference the Ferodo drawings.

The CP5060 and CP9660 use the Ferodo FRP3003 shape.


The CP9668 uses the Ferodo FRP3014. It has the same footprint as above, except it is 25mm thicker.

ST-60 uses the Ferodo FRP3054.


If you're wondering what the thickness difference looks like on these pads, below are comparison shots between the 18mm thick pads used in the CP9660 vs. the 25mm thick pads used in the CP9668.

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      05-18-2015, 10:28 AM   #12
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Are you UK based or USA ??
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      05-18-2015, 11:09 AM   #13
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Are you UK based or USA ??
USA.
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      05-18-2015, 11:51 AM   #14
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Just curious, is the fitment for e9x 335i offered on these calipers?
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      05-18-2015, 01:40 PM   #15
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Quote:
Originally Posted by jritt@essex View Post
... You most definitely do NOT need to dismount them to bleed. You only have to bleed the top bleed screw, which definitely simplifies and speeds up the process...
It's quite brilliant, actually - they cut the number of SKU's in half by putting a bleed screw at both ends. Normally, they'd need four part numbers to cover leading and trailing, left and right. To go from one side to the other, the order of the staggered piston diameters has to be reversed, and to go from leading to trailing, the bleeder has to move from one end to the other.

But, if you put a bleed screw on both ends, then a caliper can be used in either the leading or trailing position depending on which bleed screw is up. And in the wonderful world of modern manufacturing and distribution, it's much cheaper to stock two parts than it is to stock four.

The other clever bit of design is that they only have one bleed screw at each end, not two separate ones for the inner and outer pistons. And the way it's positioned, you can bleed with the wheels on the car, although you have to have access underneath to reach it.
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      05-18-2015, 07:03 PM   #16
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Gosh, I feel like I should have waited to get this kit. Any options to "upgrade" from the existing Essex/AP racing kit, perhaps when my rotors need changing? Although I must say that it might be a while as operating the existing kit on some hilly "fun" street driving as well as 4 track days, and 16,000 miles later, the pads are barely worn! Still running like a charm and glad you guys are offering other options!
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      05-19-2015, 04:37 AM   #17
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Quote:
Originally Posted by jritt@essex View Post
USA.
But could ship to the UK ??
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      05-20-2015, 12:08 PM   #18
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best kit now available for this platform bar none. Those callipers are SERIOUS!
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      05-20-2015, 02:28 PM   #19
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I'm already committed to stoptech for my e92. But if you were to develop this for the F8X you have a buyer.
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      07-17-2015, 11:35 AM   #20
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Our Corvette versions of our new Radi-CAL Pro5000R BBK's are shipping to customers today. Lots of info and pics to whet the appetite.

ps Please excuse the oversized pics on our site...we're working on a new website and crossing platforms is making it tough to keep everything sized properly.










Last edited by jritt@essex; 01-29-2016 at 03:17 PM.
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      07-17-2015, 11:41 AM   #21
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Quote:
Originally Posted by FogCityM3 View Post
Gosh, I feel like I should have waited to get this kit. Any options to "upgrade" from the existing Essex/AP racing kit, perhaps when my rotors need changing? Although I must say that it might be a while as operating the existing kit on some hilly "fun" street driving as well as 4 track days, and 16,000 miles later, the pads are barely worn! Still running like a charm and glad you guys are offering other options!
Nah...it's just like an iPad. Today's best one is tomorrow's second best one. Sitting on the sidelines waiting just makes you miss out on enjoying what's available now.

I'm glad our brake kit is working as expected for you!

Quote:
best kit now available for this platform bar none. Those calipers are SERIOUS!
Thanks. There is nothing else remotely like this on the market right now at any price.

Quote:
I'm already committed to stoptech for my e92. But if you were to develop this for the F8X you have a buyer.
Thanks. We'll see what happens down the road.
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      07-20-2015, 12:40 AM   #22
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i'm interested in this kit!
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