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03-23-2010, 09:25 PM | #23 | |
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Tell us more about the ducting pieces you bought. What are you using for backing plates? I'm waiting for bimmerworld or turner to release a complete kit with a decent set of backing plates. |
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03-24-2010, 08:29 AM | #24 |
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I'm still failing to see how the brakes are giving you such a problem, new pads, half gone? Excuse me for not understanding, but doing Watkins Glen, The Poconos, VIR, NJ Motorsports Park, and then an entire season of AutoX on one set of pads with still no fade, I am very perplexed at your issue. Everyone drives the car "HARD", me 155 down the back straight at pocono, 154 in NJ, 151 at the Glen, all prior to HARD Right handers where heel/toe and 150 - 60 is a must. So either riding the brakes is an issue, the car had over 50k on the factory pads, or there is a defect in the hardware. Before spending tons of money to fix a problem that may be user related, I would go back to the track and talk to a few instructors who have m3's, (they are always around) and ask them about getting the most out of their car. But racing formula cars and karts one would hope that you know these caviats. No need to throw money at a problem if a multi stage approach can be used to resolve it.
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03-24-2010, 06:03 PM | #25 | |
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he did post this
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03-24-2010, 07:23 PM | #26 |
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Not sure what you're worried about. The stock setup is more than capable of handling multiple track days, and hard breaking. I've got one question: When you took your M or when you take your M to the track, are you driving solo, or is there an instructor in the car with you?
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03-24-2010, 07:24 PM | #27 | |
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I am doing a bmw CCA event so a instructor will be in the vehicle most of the time, I will probably be by myself for a session or two. |
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03-24-2010, 08:02 PM | #28 |
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How many events have you done? I ask for a reason. The BMW is VERY capable of withstanding many many track days. I am still perplexed as to how ScheerSpeed had serious brake problems. Especially after only 5 sessions.
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03-24-2010, 08:49 PM | #30 |
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I completely agree with manonfire, I have done a number of years of DE and the M3 is definitely capable enough on the track. I just flushed the brake fluid and am using stock pads and rotors and had absolutely no issue on the track. I was just out this weekend in NJMP thunderbolt track and was running advanced group - I had to brake from 130 down to 60 for turn 1 and the car was perfectly fine.
It starts getting a little softer after 20 minutes of hard driving but sessions only last for 20-25 mins. I think it's more than sufficient to start with Pads, Fluids and Lines - don't get too influenced by vendors who keep pushing different pads, go out there and try it out first before you bust $500. |
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03-25-2010, 07:40 AM | #31 |
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Manonfire, the issues is not hitting high speeds on a hot lap. It is hitting those speeds/times lap after lap in a prolonged fashion. I did that for the most part of 3 x 40+ minute sessions at the Glen, and rotor temperatures at the paddock were over 600C. RS19 pads were literally smoking. Things really start to break down in those conditions (and pad wear seems to accelerate).
This is not just my opinion/observation. I have a friend with a E90 M3 who is an experienced racer. One of the faster guys in the region. I've had this conversation with him, and he said, "It's a heavy road car, you can't push it like that and expect the brakes to hold up. You need to conserve the car between hot laps." I don't think there is anything surprising about any of this. Not reason enough to drop $7k in a BBK necessarily. Plenty of realiable fun to be had in 25-30 min DE sessions. Track layout matters as well. Never had the same issue at Lime Rock or NJMP with 30 min sessions for instance, and rotor temps remained below or around 500C at the paddock. Last edited by lucid; 03-25-2010 at 08:36 AM.. |
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03-25-2010, 03:24 PM | #32 |
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I just did Laguna Seca ( check the videos!: http://www.m3post.com/forums/showthread.php?t=366679 ) and I'm pretty sure I warped my rotors.
I don't have much experience on the track, this was my 5th event (Autoclub Speeday, Infineon, Button Willow, Willow Springs, Laguna Seca) each of them 2 days. I just got my pads replaced at 26k miles, about 1 week before I went to Laguna Seca. The computer when I picked it up after the brake job said I had 26k miles left on the front pads. It now says 8k miles after about 100 laps at Laguna.. and the rotors were shaking like crazy on the track towards the end.. I had some minor shaking happen after Autoclub, but nothing like this last time. Also, after Autoclub it mostly went away after a few days, but never completely. I also still had the same minor shaking after they did the brake job, months later. I'm not sure if they replaced the rotors or not.. I can't find my paperwork now. However, I personally dont think its the "material on the rotor" situation this time.. I can feel the pedal modulating up and down as I brake.. I'm going to take it in. I do think that being on the brakes too long does have a part in it, I know that compared to some of the guys I've ridden with, they brake harder and for a shorter period of time than I do. I have been trying to work on that, and towards the end of Laguna I felt I was making progress.. but be warned if you do some track days!!
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2003 330 CI - Sterling Gray / Blk Leather - 5 MT 2005 330 CI ZHP - Sparkling Graphite / Blk Alcantara - 6 MT 2008 E92 M3 Coupe (FINALLY) - Space Gray / Blk Leather - 6 MT 2013 F10 535i M-Sport - Space Gray / Blk Leather |
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03-25-2010, 03:35 PM | #33 |
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the pad deposit on the rotor are not even, thus the wobble. Put on some aggressive track pads and stop from high speed a couple of times can remove it or a rotor resurface, dealer most likely just replace them(hopefully)
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03-25-2010, 10:03 PM | #34 |
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It may be a combination of things. I only have 10K on the car. Its not a daily driver, so I don't sit in stop and go traffic. It probably is that and the way I apply the brakes on the track. Hard and smooth, for shorter periods of time. Harder and Smoother is the key. No riding the brakes. It takes some getting used to. Suprisingly, like I said, I just changed the pads this season and the rotors are still solid. One suggestion, after your cool down lap, when you come in to the paddock, DO NOT apply the E-brake and roll the car front and back after a few minutes. Keeps the pads from locking or burning on the rotors. Good luck with the brakes. It would suck to have to completely change rotors and pads all the time.
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03-25-2010, 10:05 PM | #35 |
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Sheer
Homestead is tough on your brakes. I burned thru all four brake boots, but my buddy drove his M3 with no issues. Sebring may be better suited for you ride. I'll be there.
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03-25-2010, 10:08 PM | #37 | |
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03-26-2010, 12:20 PM | #38 |
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03-26-2010, 12:21 PM | #39 |
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03-26-2010, 12:23 PM | #40 |
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03-26-2010, 12:29 PM | #41 | |
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different tracks call for different wear on certain parts. certainly brake pads wear down faster at higher temperatures (correct me if im wrong). and like lucid said, top speeds dont really have much to do with how hard you use your brakes. stock pads vs PF01 pads are going to stop pretty much the same distance and time at normal temperatures. however at elevated temperatures, track pads are made to operate at those temperatures, and stock pads are not. meaning the higher the temperature the better a track pad will perform vs. a street pad. |
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03-26-2010, 01:43 PM | #42 | |
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04-14-2010, 10:35 AM | #44 |
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its been a few weeks of driving now and no more vibration under braking, so it must have been uneven deopsits. however my rotors are cracked to hell
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