Yokohama World Time Attack Challenge Brembo Brake Kits
Special Brembo brakes to meet the WTAC rules, go faster, and still stop just as good….
FRONT WTAC BREMBO BRAKES
In a nutshell, this is an extremely lightweight but just as powerful version of the Evo 350mm Brembo front brakes; to achieve this unprecedented performance upgrade you would have to use carbon/ceramic brakes and those would cost more than most of our cars lol
Whilst racing at the Yokohama World Time Attack Challenge, we discovered we didn’t actually need the heat capacity – the weight – the EVO 10 front rotors provided, not for the handful of laps for time attack racing. Below is is a photo of the actual rotor used at the WTAC – DBA4000 @ 350x32mm – note the thickness. After 6 (six) laps we inspected the thermographic heat paint: green is only starting to flash off – orange and red are still perfect – meaning these 32mm thick rotors were barely warmed up.
6 laps of World Time Attack and we didn’t even reached 458°C
We didn’t need the heat capacity for time attack and that means we don’t need it for a street car or a drag car either, but we wanted to keep all the braking power. The question then became “How can we save lots of weight without sacrificing stopping power?” By analysing all 212 pages of the Disc Brakes Australia catalogue we shortlisted a number of lighter-weight rotors (such as DBA42031, DBA42605, DBA52124, DBA52320, DBA52448, DBA52992) and expensive 2pc options. They saved ~1.5kg of weight, which is nice. We wanted to save more, lots more.
Here’s what we engineered for ultra light front brakes: Evo Brembo 4piston FRONT calipers + new Alpha Omega Racing aerospace billet adapter kit + Nissan 370Z REAR ROTORS @ 350x20mm.
32mm VS 20mm
Yep, in a WORLD FIRST we have exploited the slim width + large diameter REAR 370Z rotors on the FRONT axle. The slim width saves us huge weight whilst the large diameter keeps all the braking power. By doing this we save:
WTAC Front Brake Kit- 6.0kg rotational and unsprung weight savings!
FASTER THAN EVER
The combination of unsprung and rotational weight saving is THE holy grail of weight saving. With this upgrade not only do you have the same amazing stopping power of the Evo 350mm Brembo Front Brakes thanks to using the same Brembo calipers, same pads, and the same diameter rotors but this is a brake upgrade that actually INCREASES ACCELERATION, gives you MORE GRIP, have a COMFORTABLE RIDE, the car will HANDLE BETTER and stops EVEN FASTER – these are all benefits of saving so much unsprung AND rotational weight.
Let’s quickly put 6.0 kilograms into perspective: racing rims strive to save grams – yes they’re talking GRAMS and not KILOgrams – because fast racers know even a “small” unsprung and rotational weight saving equals maaaaaaaaassive performance gains. Don’t believe us? Check out the Volk Racing TE37 SuperLap Edition in size 18×10.5″, Rays Engineering is proud to achieve a saving of 400grams over the non-SuperLap edition. Compare a set of TE37SL @ 1.6kg total weight saving for ~$4000 to our 6.0kg total weight saving, we get FOUR TIMES the benefit for a tiny fraction of the price.
Evo X 350x32mm rotors = 11.8kg
370Z 350x20mm rotors = 8.8kg
Weight saving per side = 3.0kg
Total unsprung + rotational weight saved = 6.0kg* = 25%!!!
* Due to using a 20mm rotor in a 32mm caliper the brake pads will need spacing out. In the kit we have included a set of 4 CAD-weight-optimised CNC machined billet stainless steel brake pad spacers with 4 CNC machined billet stainless steel load spreaders. Each spacer is 0.1kg.
Stainless brake pad spacers
Also! The high offset of the 370Z rear rotors gives you an extra 24mm (~1″) caliper to wheel spoke clearance so you can now have your Brembo cake and eat it too with deeeeeeeeep dish wheels – if that’s your thing – on the front of your car, finally! If that’s not your thing then you’ll be happy to know the mass of your brakes have been further centralised for better dynamic handling.
WTAC Front Brake Kit – one extra inch of clearance!
WORRIED ABOUT DOING HALF A LAP AND THEN MELTING?
Don’t be. Just compare the sizes and weights of these popular rotors:
- Evo 9 @ 320x32mm = 9.0kg
- R34 GTR @ 324x30mm = 9.0kg
- 370Z @ 350x20mm rear = 8.8kg
- S15 @ 280x30mm = 7.6kg
Have you noticed those GTRs and EVOs with 5/6/7/1000 horsepower running around with stock brakes? The only thing melting is the motor lol. With the WTAC Brembo brakes you have the same heat capacity, a larger surface area for faster cooling, and the 350mm gives you strong brakes. If you’re still worried then you have The Standard upgrade with 32mm wide rotors here: Evo 350mm Brembo Front Brakes.
REAR WTAC BREMBO BRAKES
In a nutshell, this is a no-spacer version of our Evo 350mm Brembo rear brake adapter kit to meet the rules of the Yokohama World Time Attack Challange. 2016 WTAC rule 10.1(c) states:
“Original hub location must be retained”
We have a number of customers competing at Yokohama’s World Time Attack Challenge and we ourselves are competing at WTAC – as usual we play fairly and we play by the rules. There were also many of you guys asking for a rear big brake kit with no spacers, sooooooo we eliminated the 6mm hub spacers from the original Evo 350mm Brembo rear brake adapter kit; the trick to installation is to remove a bit of material from the caliper. The size of material to remove is about the size of your thumb tip. This is required to make room for the OEM knuckle.
If you don’t want to modify the caliper then we have a bolt-on kit with 6mm hub spacers here: Evo 350mm Brembo rear brake adapter kit.
NO SPACERS: WTAC Rear Brake Kit – requires modification to the caliper
The other good news is, since there are less parts in this kit, the price is reduced, installation is faster, your wheels aren’t spaced out and there’s less weight for more speed 🙂
Everything else remains the same as the Evo 350mm Brembo rear brake adapter kit.
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