The Trans4mer Big Brake Kit – (Supports 9.25-11.75″ Rotors)

Description

1990-2005 Mazda Miata Big Brake Kit

One Kit – Seven Supported Rotor Sizes

The Trans4mer Miata Big Brake Kit is designed for maximum flexibility allowing users to upsize or downsize overall rotor diameters without having to purchase new brackets, or entire brake kit.   Using Wilwood 4-piston Powerlite calipers, the Trans4mer BBK is light weight and reliable, while offering superior cooling and stopping power without upsetting overall balance.  The brackets use a set of spacers to switch between rotor sizes.  Brackets and spacers are made from high strength 7075-T6 aluminum with stainless steel threaded inserts and anodized (Type II) blue.  With multiple supported rotor sizes users can inexpensively change between different diameter rotors allowing for more flexibility with wheel fitment and across applications from autocross to endurance racing.

Supported rotors:

• 235mm – ’90-93 Miata – 8.1lbs
• 255mm – ’94-05 Miata – 10.4lbs
• 270mm – ’01+ Sport Miata – 12.8lbs
• 280mm – ND Miata – 12.8lbs
• 281mm – Wilwood 11″ 2pc – 9.4lbs
• *294mm – ’12-’13 Mini Cooper S – 14.1lbs
• *298mm – Wilwood 11.75″ 2pcs – 10.2lbs

*Mini S and 11.75″ rotors are outside of the recommended rotor range for the Powerlite Calipers but were added per customer request.  Although this combination has been tested with no issues with performance or reliability this combination should be monitored and appropriate caution should be taken if using this large of a rotor.  See notes below for additional information.

Four piston Wilwood calipers are matched with the stock master cylinder, proportioning valve and rear brakes to maintain brake balance similar to stock.

The Trans4mer BBK reduces unspring weight by a total of 7.68lbs by reducing caliper assembly weight by 53%.

Stock 90-93 Front Caliper Assembly – 7.29lbs
Stock 94-02 Front Caliper Assembly – 7.58lbs
Transformer Front Caliper Assembly – 3.45lbs   (52%/54% Weight Reduction)

Track Days/Street Use:  With dual use pads the Trans4mer BBK is perfect for street & track applications.  A prominent Wilwood branded caliper adds style while retaining rim compatibility within the same OEM profile. Reduced unsprung weight provides better handling and reduces shock load over bumps on the street.  Recommended brake pads are the BT-10 and BT-20 for street and occasional track use, and the PolyMatrix E for track cars.

Sprint Racing: With more pistons, more consistent brake temps, and a lot less weight the light weight kit will reduce your lap times under braking, in the corners and on the straights.  Whats more, Wilwood calipers are easier to maintain, check and swap pads, and more reliable than the OEM calipers.

Endurance Racing:  The Trans4mer BBK is a no-point upgrade for ChampCar under the 2X rule and works best with Raybestos ST43 front and ST42 rear pads.  Although possible to complete a 24 hour race on one set of pads with stock rotor sizes, upgrading to the 11″ rotor size is recommended for 24 hour races.  The Powerlite calipers allow for rapid pad changed which can be completed in a pit stop.

Full Front Kit Includes:

• 2 x Wilwood Four Piston Powerlite Calipers
• 2 x Caliper Brackets 7075-T6 Aluminum with SS Inserts
• 2 x Stainless Steel Braided Brake Lines
• 2 x -AN3 to 1/8-27 NPT Line Adapters
• 2 x -AN3 to M10 Line Adapters
• 32 x Bracket Spacers 7075-T6 Aluminum
• 20 x Caliper Bolts Alloy Steel (>Grade 8 @ 170KSI)
• 4 x Bracket Bolts Alloy Steel (>Grade 8 @ 170KSI)
• 4 x NORD-LOCK 2pc High End Lock Washers (Brackets)
• 4 x NORD-LOCK 2pc High End Lock Washers (Calipers)
• 1 x 5/16 Hex Bit (for Caliper Bolts)
• 1 x Loctite Red
• 1 x Installation Instructions

Requires:

• Rotors
  • 235mm, 90-93 1.6L Mazda Miata
  • 255mm, 94-05 1.8L Mazda Miata (non sport)
  • 270mm, 01-02 1.8L Mazda Miata Sport
  • 270mm, 03-05 1.8L Mazda Miata
  • 280mm, 16-20 ND Mazda Miata (W/O Brembo, or W/ Brembo)
  • 281mm, Wilwood 11″
    • Disc
      • HP30, 160-5840
      • HPS 30, 160-10358
      • SRP, 160-7099, 160-7100
      • GT72, 160-12892
    • Hat – 170-11682
  • 294mm, ’12-13 Mini Cooper S
  • 298mm, Wilwood 11.75″
    • Disc
      • Ultralite 32, 160-0471
      • Ultralite 32 Drilled, 160-5863
      • HP32, 160-5841
      • SRP, 160-7101, 160-7102
      • HD36, 160-12283, 160-12284
      • GT36, 160-12285, 160-12286
    • Hat – 170-10200
• Brake Pads – Wilwood 7912 Shape
• Loctite Thread Locker
  • Orange (Street)
  • Red (Street/Track) *Included
  • Red High Temperature (Racing)
• Permatex High Performance Thread Sealant (Unless pre-install option is selected)

Wheel Fitment:

• 90-93 Rotors:  Most wheels will require a wheel spacer of ~10mm since the caliper is so close to the hub.  The spacer should be no more than 5.5″(150mm) in outside diameter.  An exception is the 15×9.5″  Konig Freeform.
• 94+ Rotors:  Fits most after market wheels without spacers, however will require 5mm or 10mm wheel spacers with stock 14″ wheels.
• 01 Sport Rotors:  Fits most 15″+ wheels
• ND Miata Rotor: Fits most 15″+ wheels
• 11″ Wilwood Rotor: Fits most 15″+ wheels
• Mini S Rotor: Fits most 15″+ wheels

**Fits Most means that none of the applicable wheels we’ve tested had fitment issues.

Wheels tested:

• 14 x 5.5″ NA Daisy – Fits: 01 Sport, 94+, 90-93(10mm Spacer)
• 14 x 6″ NA8 7 Spoke – Fits: 01 Sport, 94+, 90-93(7mm Spacer)
• 14 x 6″ NB 5 Spoke – Fits: 01 Sport, 94+(10mm Spacer), 90-93(10mm Spacer)
• 15 x 6.5″ Sport Edition – Fits: All, 90-93(10mm Spacer)
• 15 x 9″ 6-UL 949 Racing – Fits: All, 90-93(10mm Spacer)
• 15 x 9.5″ Konig Freeform – Fits: All
• 15 x 10″ Dekagram- Fits: All, 90-93(10mm Spacer)
• 15 x 10″ Jongbloed- Fits: All, 90-93(10mm Spacer)
• 16 x 6.5″ NB 5 Spoke- Fits: All, 90-93(10mm Spacer)

*Mini S and 11.75″ rotors are outside of the recommended rotor range for the Powerlite Calipers but were added per customer request.  Although this combination has been tested the pad may sit near the edge of the rotor resulting in a small lip from the chamfer near the rotor edge.  This lip, created by the 11.75″ rotor,  can be seen in the following photo.  This lip does not impact performance or reliability but will need to be removed with a file if using the same pads in another rotor combination.  This combination should be monitored and appropriate caution should be taken if using this large of a rotor.