AP Racing Radi-Cal Big Brake Kits

12 Feb

APRadi-cal

We are now offering the full Radi-Cal big brake kit setups from AP Racing. This caliper design has raced successfully the world over, and is now optimized so that even a street car can take advantage of them. Some features that separate these setups from others, Firstly, these use a forged caliper, which are both lighter and stiffer than a typical cast caliper used in other big brake kits. One of the neatest aspects of these kits are they were designed to be user friendly. Not only are they a total bolt on, but from a servicing standpoint, they offer very quick and easy pad changes with the removable forged “H” brace at the top of the caliper. The caliper stays mounted to the car, and pads are quickly able to be swapped out.

apradi-calhbrace

The pistons are staggered hard anodized aluminum for equalized pad pressure, which in turn promotes better bite, more consistent brake torque, and the best pad wear possible. Dust seals are incorporated to ensure long life and minimal running costs.

apradicalinternal

The kits are all designed around OEM ABS and traction control systems as well, so no guesswork involved from a chassis setup standpoint. While many nowadays fit a big brake kit simple for their aesthetic value, AP has gone a long way to ensure these are both beautiful as well as the most durable calipers out there – they are both anodized and high temp painted, not just one or the other.

APradi-calassembly

The disks used in these kits are directionally curve vane vented for maximum air flow through the disc. AP Racing’s unique curve vaned discs are Dyno and race proven as the best designed rotors for optimized cooling. The curve vane rotor acts an air pump pulling air into the center of the rotor and blowing it through the veins and out of the top of the rotor. This act allows the rotor to be self-cooling and work extremely efficiently.

AP Racing’s Wide Disc Technology (WDT) is used for the most efficient way to transfer heat to from the disc. Designs using wider discs with larger air gaps increase air flow rates within the discs as proven by AP Racing’s FEA, CFD and TSA testing. This goal was achieved while not increasing disc weight or disc stress and decreasing disc temperatures by up to 300 degrees F.

The disks are of course a 2 piece design, with anodized 6061 T-6 hats. That in and of itself isn’t necessarily “news”, but what is interesting is how they mount. These hats use 12 point mounting vs the 10 point that is more typically found. What’s more, these use floating hardware for the hat to disk which allows both components axial and radial movement. This allows each to cool quicker and more efficiently, while simultaneously allowing the disk to remain centered relative to the caliper. That feature then pays the user big dividends by significantly limiting pad knockback.

apradi-caljhookdiskrotor

The disks also feature the J Hook slot design which increases frictional surface area across the rotor face but without being prone to cracking, like in a cross drilled rotor under extreme temperature swings. We can also offer the kits with a combination slotted/drilled rotor for those that prefer such a configuration.

The pads supplied are true dual purpose

The last piece to the puzzle is of course the brake lines. These can often be a weak link with other offshore kits, but not so with AP. They are made by Goodridge and feature fully extruded PTFE inner sections wrapped in a high strength stainless braid that is both corrosion and fire resistant. This is then all wrapped with a clear outer sleeve as well.

apradi-calbrakeline

These kits are being offered initially for a wide range of vehicles including the Audi A4/S4 and A5/S5, BMW 3 series, Z4, M3 and M5, Cadillac CTS-V models, Camaro, C5-C7 Corvette, the various SRT-8 models, Mustang, Infiniti G (G25, G35, G37), FX (FX35, FX45, FX50 and M models (M35 and M45), Jeep, and the 350Z/370Z, with additional models to appear. We will be offering free shipping through March 31, 2014, as well as free brake fluid as well (from several choices, depending on your individual needs).

For all retail and wholesale inquiries, contact us at z1sales@z1auto.com

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