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08-02-2017, 05:51 AM | #23 |
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Did some enhancements to the old brake ducts. Here are the new templates for the brake ducts. White dots are where holes should be drilled for the cable ties.
Right: Left: This is a pic of the brake duct on the 997 Turbo, showing the cutout on the inner radius of the brake shield. |
08-02-2017, 06:27 AM | #24 |
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Nicely done. Awesome bang for the buck mod
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08-09-2017, 08:22 AM | #26 |
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Nice work!
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08-09-2017, 09:33 AM | #27 |
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Blowing air directly onto the rotor does little to control brake rotor temperature, blowing air into the central hub does most of the work, because vented rotors cool by sucking air in through the center of the hub and blowing it out of the vanes through the spinning action of the rotor. Cutting the shield is unnecessary, that's why you see most of the racing brake duct design that replaces the dust shied redirect the majority of the cool ambient air to the center of the rotor, not the rotor surface.
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08-09-2017, 10:30 AM | #28 | |
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08-09-2017, 06:58 PM | #29 |
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snort
explain every brake duct on almost every BMW ever made
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08-09-2017, 07:08 PM | #30 |
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If they're mounted in that fashion on the 997 GT3, they can't possibly be worthless. Maybe cutting the shield was excessive, but can't hurt to get more air to the disc.
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08-10-2017, 06:17 AM | #31 |
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Ok final iteration going in.
Right: Left: This is what they look like mounted. Right: Left: Picture taken from the angle of the duct, showing where the airflow will go: That's it! Trackday next week, will report more after that. Redd |
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08-14-2017, 02:50 AM | #32 |
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Trackday over and the ducts performed admirably! Stayed attached after several 200+kph runs down the front straight of Sepang F1 Circuit.
They also helped a lot in preventing fade. I usually start to experience brake fade after the 3rd session, but I ran 5 sessions today and no fade. Would love to hear from the other trackies if they have pyro data on these ducts. I'm gonna call this one a success. |
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08-18-2017, 10:14 PM | #33 |
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08-19-2017, 01:37 AM | #34 |
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To be honest I just used the pictures as a guide when doing extra sets. Just use the markings as reference points and cut away. All I used were a sharp pair of sharp scissors for 90% of the cutting and rounding the corners. Also used an exacto knife to cut one of the portions that I couldn't get to with the scissors.
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08-27-2017, 12:21 AM | #35 |
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I would never imagine a Porsche part being $7.50 but it looks intriguing!
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08-28-2017, 08:49 AM | #36 |
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you can add a porsche crest for $500, and have them painted in body color for $950 (must also select Sport Chrono; total vehicle price increase of $3,900)
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08-28-2017, 11:02 AM | #37 |
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11-13-2017, 10:10 PM | #39 |
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Why can't BMW do this for the /M cars?? Especially up front. They make all kinds of plastic that shatters after 4-5 years. At least make it useful.
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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03-31-2018, 08:54 PM | #40 |
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Long term report - After 3 trackdays, daily driving and several long distance trips driving up to 200kph, these brake ducts have remained in place.
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10-14-2019, 02:02 AM | #41 | |
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Quote:
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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04-22-2020, 11:44 AM | #43 |
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Bunch of M2 guys have done this, great results on the track. If it works for Porsche, you know it'll work. Porsche engineers don't add weight to the car unless it's functional. Hell, the GT3 RS don't even have real door handles and the Porsche crest is a decal instead of a 1oz badge.
OP: You do not want to cut the shields. The idea of these ducts are to bring fresh air to the central hub, at high speed the air will make its way to the hub area (fluid dynamic engineers can better explain this). The rotor is a fan that draws air from the hub to cool BOTH sides of the rotors. The shield channels the fresh air to the hub area, purposely blocking the rotor. Blowing fresh air directly at one side of the rotor disrupts this "fan movement" and uneven cooling of one side of the rotor. See below what a true duct is supposed to bring air to. What this means is most of the aftermarket brake duct shield adapters out there are flawed if it just hits the one side of the rotor surface. M2 DIY, so don't follow it for our cars, just use as a reference: https://www.youtube.com/watch?time_c...ature=emb_logo
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Last edited by Signature Wheel BMW; 04-22-2020 at 11:53 AM.. |
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