Project DBA R35 GT-R: Upping Stopping Power with Brembo and Race Technologies

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The Brembo rotor hat is hard anodized 6061 high strength aluminum CNC-machined.

The rotor is zinc plated, which is nice as the non-friction surfaces won’t get all rusty and nasty looking and rusty water won’t drip out of your rotors to stain your wheels. The only drawback with zinc is you must drive and brake gently at first to scrape it off the friction surfaces before you bed your pads in or the zinc will transfer onto the pads surface and potentially cause juddering.

You can also see Brembo’s Type 3 rotor face grooving. The Type 3 grooving is aggressive and actually improves the pad bite initially, has more aggressive friction characteristics and releases smoothly. The groove pattern is designed to provide a lot of biting edges without causing uneven wear.

 

Here is a closer look at the bobbins/fixings that rotor float on the hats with. Note the large “drive” area that the spacers engage on the alloy hat with.

You can also see how the anti-rattle springs put tension on the rotor to reduce noise.  Note just how thick the friction faces are on the high thermal spec rotor. You can also see how the zinc plating extends down into the vents of the rotor.

 

The rear rotor is a two-piece design like the stock rotor and the front rotors. Perhaps the biggest difference is the alloy hat. The stock part hat is iron and the Brembo part thus saves a lot of weight.

The Race Technologies/Brembo rear rotor is externally the same dimensions as stock, 380mm in diameter and 30mm thick. The Brembo rotor weighs 22 lbs vs the stock 27.8 pounds for a weight savings of 5.8 lbs per side. This makes for an overall loss 6.4 lbs for the entire Race Technologies brake upgrade over stock when you subtract out the weight gain of the front rotors.

When you count the weight savings of the wheels and suspension, the overall loss of weight from the car approaches 50 lbs so far.  Considering the most of this is unsprung weight and/or rotating weight, the lost is pretty considerable from a performance standpoint!

The new rear rotor, like the front, is also the high thermal spec internally thicker rotor, and its friction face is wider than stock. Even though the friction ring is a lot heavier than stock, the hat is so much lighter than stock, causing the overall weight to be lower.

 

You can see the additional thickness of the of the braking faces of the rotors friction ring here.

You can also see the hat’s standoffs for air circulation between the hat and the friction ring.

 

7 comments

  1. Great article! I can’t seem to find a dealer who sells the kit without including new calipers as part of a big brake kit.

    Would you mind pointing me in the right direction to purchase the set?

    Thanks so much!

  2. Thank you. Unfortunately, I have a 2009 and it doesn’t show those as an option on the website for a 2009.

    I am not sure why. It only shows 405s available in a complete kit.

    Do you know why?

    1. It probably is because the 2008-2012 GT-R uses a 380 x 34mm rotor. In 2012 the front rotor size went to a 390 x 32.8mm rotor. The Brembo rotors will fit the older cars but a thicker caliper spacer (and possibly longer bolts) should be used. I would call Race Technologies and ask them if they have the thicker spacer.

  3. Hi Kojima san! Can you let us know how these brakes have performed compared to stock after real world use? And perhaps if you’ve taken them to the track how that was.

    I’m about to order these same rotors and RT TS20 pads based on your review! Also were the pads noisy or dusty? Hopefully less than stock rotors/pads but curious how they compare to say AP J Hook + Endless MX-72 pads. Thanks!

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