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theDuke866
All American
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You really think? The brakes look kinda small to me.

Now, the Brembo units from the TRD package on the later cars...that's definitely a lot of brake for the car.

3/2/2020 8:08:23 PM

TKE-Teg
All American
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Vented rotors front and rear, 11.6 and 11.4 inch diameter. For comparison an S2000 has 11.8 inch front ventilated rotors and solid 11.1 inch rear rotors. A faster car with smaller brakes.

I never had a problem overheating the braking system in that car and it's faster than an FRS. My supercharged BRZ was fine with just Carbotech track pads, though I'll admit that was on stock rubber.

I have no experience with the pads you're using, however.

3/3/2020 8:38:50 AM

utowncha
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moisture in the system?

3/3/2020 3:18:47 PM

Hiro
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^^ More than just Diameter, thicknesses plays a role too. Rotors are heat sinks and thickness is just as important as OD and swept area...

Brembo Front: 326mm x 30mm Ventilated
Standard Front: 294mm x 24mm Ventilated

Brembo Rear: 316 x 20mm Ventilated
Standard Rear: 290mm by 18mm Ventilated.

Yeah. The Factory Brembos on my wife's car is nuts and they feel phenomenal. They are so big for the car. That said, I find it troubling that the brakes suffered that bad on you Duke. Maybe you were just giving the car more hell than it was prepared to handle that weekend? Motul RBF 600 is good fluid. I've never had issues with that. I have had issues in my EG hatch with Hawk Blues. I ran Carbotechs on my Vette and I run Carbotechs now in my Civic Hatch. Carbotechs are pricey, but they've satisfied my high expectations of them.

For brake ducting, I made my own using sceet aeroduct from Aircraft Supply (aircraftsupply.com/). You can also use scat, as most people do. I threw extra money at the lined ducting because I could. I made my own brackets out of exhaust tubing and some generic/universal duct/funnel. When the temp is 50-60*, I have to keep the ducts taped off, but in the heat (90*), my brakes are at a nice 400* temp range...



[Edited on March 3, 2020 at 11:23 PM. Reason : .]

3/3/2020 11:08:16 PM

Hiro
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Here are some pictures of the work I've done regarding brake ducts. Maybe it'll inspire you, if you're into this kind of "at home fab" stuff. I'm fully aware that these may not even be needed for my car; I've talked to a few NASA Honda Series drivers and quite a few run races without any brake ducts and have no issues with overheating hubs/rotors/brakes on track. I just felt like doing this because I like building/designing stuff and #trackcar.

I've thought about making a lip to the end of the brake duct by the rotor to encourage the air to flow into the hub. I know that as the wheels are turning, the hub is pulling a vacuum on the air coming from the brake ducts. Currently, I haven't had any issues with needing more cooling, so I use that as my justification for not adding a final angle to the ends of those ducts (Picture 9). Duck Tape helps keep the abrasion on select areas of the ducting to a minimum. I've take the ducts off from the reducers to the rotors when the car is not being tracked. I've got 10 days of track time on these ducts an there's no noticeable wear on them. The SCEET/SCAT is good quality stuff.

Good video showing how ventilated rotors pull vacuum at the hub and vent through the vanes:
https://www.youtube.com/watch?v=qWSbt-KjtqE

Pic 1 - Generic Ducts Inlet (3" collector)


Pic 2 - I'm greedy with my 3" collector/intake and had to neck down to 2.5" so tubing wouldn't rub at full lock.


Pic 3


Pic 4 - Mounted each 3"->2.5" reducer to hardpoints on the motor/trans.


Pic 5 - Used caliper mounting bolt location to attach the brake ducting assembly


Pic 6


Pic 7


Pic 8 - Everything Installed


Pic 9 - Concept idea of getting more air funneled to the hubs.




[Edited on March 3, 2020 at 11:54 PM. Reason : .]

3/3/2020 11:37:26 PM

theDuke866
All American
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shouldn't be any moisture in the system. fluid was only maybe 6 weeks old.

i think ducts are the thing to try next. there are a few ready-made kits for a few hundred bucks. if it was a total track-rat, I'd prob do DIY, but I want it to look nice without having to spend eleventy thousand hours on it.

the brembos are readily available used, but jesus, they're $2000 used.

3/5/2020 12:02:54 AM

TKE-Teg
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That's almost hilarious, given that the Performance Package kit (which those brakes are part of) was a $1700 factory option.

3/5/2020 8:18:43 AM

smoothcrim
Universal Magnetic!
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you can get a massive brembo setup from a jeep or old porsche pretty cheap if you can machine your own mounting brackets

3/5/2020 12:07:10 PM

TKE-Teg
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Also apparently Cadillac Brembo calipers are insanely cheap used. Not sure why lol.

3/5/2020 1:40:20 PM

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