08-05-2023, 07:47 PM | #1 |
Lieutenant Colonel
1033
Rep 1,997
Posts |
Vaporized M3CS pad* (remove your brake duct covers!)
Featured on BIMMERPOST.com So. Did a day of HPDE and blew through the stock pads (steel), damaged the rotors. Looks like I’ll need a new set of front rotors/pads. Rears look pretty good. Car otherwise drove great. Fast, stopped great, balanced. Track mode and aggressive settings except comfort chassis. Maybe the leftover nannies contributed to accelerated wear? Top speed ~150mph. About 90*F ambient temp in intermediate group at Summit Point Motorsports track, WV. If you’re going to drive the the car hard, look at more robust pads. Great experience otherwise but sad to rip through pads so fast. It might be slightly on me because I also burned up pads (while damaging rotors) on 718 gt4, GR86, SS1LE. Have fun out there! Now to find some replacements for the street.
__________________
Gone but not forgotten: '09 STi // '08 335i // '02 M3 // '11 335i // '15 M3 // '16 M3 // '16 Camaro SS // '16 Audi S3 // '18 Boxster 718S // '17 Camaro SS 1LE // '16 M6 GC CP
Last edited by evanescent03; 08-06-2023 at 09:07 PM.. |
08-06-2023, 01:26 AM | #2 |
Private First Class
394
Rep 124
Posts |
Did remove the cooling duct covers? |
Appreciate
5
|
08-06-2023, 05:50 AM | #3 |
First Lieutenant
431
Rep 360
Posts |
Regardless of the event, this is unusual. There's two ways you can completely wear down your pads to bare metal (since you mentioned damage to rotors):
- you're driving at a gt4 level endurance race - complete opposite, your braking/racing needs a lot of improvement (Not to sound like an expert, my own braking is far from perfect and I am constantly working on that). Or your pads were already half-way through? The wear accelerates exponentially due to reduced mass. Hence always better to use a separate fresh set of pads before each full-day event. |
Appreciate
0
|
08-06-2023, 08:45 AM | #4 |
Lieutenant Colonel
2569
Rep 1,934
Posts |
So you didn't learn anything from your previous 3 experiences?
__________________
|
Appreciate
5
|
08-06-2023, 04:31 PM | #5 |
2020 Z4 M40i - 2022 M4C Convt
3129
Rep 5,264
Posts
Drives: 2020 Z4 M40i - 2022 M4C Convrt
Join Date: Jun 2011
Location: Raleigh, NC - OIB, NC
iTrader: (0)
Garage List 1965 COBRA (FFR rep ... [8.57]
2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00] |
What was the mileage on the pads before you started the day?
__________________
Kevin
Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT |
Appreciate
0
|
08-06-2023, 07:14 PM | #6 | |
Major General
6657
Rep 6,727
Posts |
Quote:
Change pads, open the ducts, add additional cooling. |
|
Appreciate
1
s58544.00 |
08-06-2023, 07:47 PM | #7 |
Lieutenant Colonel
2519
Rep 1,773
Posts |
This doesn't track (pardon the pun). I'm quite familiar with SP Main and you shouldn't be destroying front brakes there, especially in the intermediate group. As someone else asked, did you remove the vent covers? How much pad depth did you have prior to the event? I've got about 4 track days on a set of OEM pads/rotors and they still have a couple days on them. I did need to replace the rear pads before the last event.
|
Appreciate
0
|
08-06-2023, 09:04 PM | #8 | ||||
Lieutenant Colonel
1033
Rep 1,997
Posts |
Thanks for the input guys!
Bottom line ... new car, new track, always lessons to be learned - the brake duct covers seems like something I definitely should've removed prior to the track day! I didn't do my due-diligence. hopefully someone can learn from my mistakes. I will say that there was ZERO fade at any point which would have triggered me to think something was going on with overheating. i've had nannies kick on with other cars and overheat breaks and inducing fade... made me investigate and turn stuff off. the 3CS was running so well i didn't suspect anything amiss. Sure didn't. I didn't expect to do a whole weekend but figured i could get through a day "as-is" ... oops. I'm guessing the brake ducts would've helped a lot. Quote:
I'm definitely not a GT4 level guy. But i don't think i'm the complete opposite either. I too realize I have a lot to learn. Are you aware of certain braking styles that you think would cause this? I believe folks who drag the brakes and have an excessively long braking zone tend to inject more heat into the system. a compressed braking zone, afaik, actually helps reduce brake wear. I've asked a ton of people at the track (drivers, race mechanics/"brake guys", etc) and have had a hard time pinning down the answer. And everyone I've talked to has been a lot more helpful than you, thankfully. thanks for the contribution Quote:
Quote:
Quote:
__________________
Gone but not forgotten: '09 STi // '08 335i // '02 M3 // '11 335i // '15 M3 // '16 M3 // '16 Camaro SS // '16 Audi S3 // '18 Boxster 718S // '17 Camaro SS 1LE // '16 M6 GC CP
|
||||
Appreciate
3
|
08-07-2023, 01:52 AM | #9 |
Private
60
Rep 54
Posts |
Good rule of thumb, you should never start a track event with less than 6 mm and I check after day 1 of a 2 day event and swap as needed--I always have a new or 6 mm+ backup set going into a weekend.
If they make Ferodo DS 2500 or DS 1.11 for these cars they are a very reliable and effective pad with predictable wear in my experience--DS 1.11 are next level stopping power/initial bite even cold and last 2-3x as long. |
Appreciate
2
BMWRacer5232519.00 M4Tejas795.50 |
08-07-2023, 04:23 AM | #10 | |
First Lieutenant
431
Rep 360
Posts |
Quote:
As for braking, I learned there is a WORLD of difference between a professional driver and amateurs in that. Someone mentioned here already, that Apex rental took 10 laps (Nordschleife, mind you, i.e. 200 Km) to wear down stock pads on their m3 - well, the guy who drove those laps is a professional driver who knows exactly how to minimize brake wear and optimize momentum and speed through corners. I am certain that an amateur can destroy the pads in under 5 laps. While braking style and errors are individual, some are quite common. My own problem is that I often have to do corrective braking after initial braking before corner, because the initial braking was not enough i.e. I tried to keep more speed than necessary ("greedy"), and midcorner realize the entry was too fast. That is a very common mistake. Have gotten better at it recently. Others include brake dragging as you mentioned. |
|
Appreciate
1
BMWRacer5232519.00 |
08-07-2023, 09:51 AM | #12 | |
Lieutenant Colonel
2519
Rep 1,773
Posts |
Quote:
|
|
Appreciate
0
|
08-07-2023, 10:12 AM | #13 |
First Lieutenant
431
Rep 360
Posts |
Well said, exactly my issue, I release brakes early, unconsciously afraid to lose too much speed (losing even more eventually, because of corrective braking).
|
Appreciate
1
BMWRacer5232519.00 |
08-07-2023, 03:21 PM | #16 |
Major General
6657
Rep 6,727
Posts |
|
Appreciate
1
evanescent031033.00 |
08-07-2023, 03:32 PM | #17 |
2020 Z4 M40i - 2022 M4C Convt
3129
Rep 5,264
Posts
Drives: 2020 Z4 M40i - 2022 M4C Convrt
Join Date: Jun 2011
Location: Raleigh, NC - OIB, NC
iTrader: (0)
Garage List 1965 COBRA (FFR rep ... [8.57]
2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00] |
Any idea why they are blocked from the factory?
__________________
Kevin
Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT |
Appreciate
1
evanescent031033.00 |
08-07-2023, 04:18 PM | #18 |
Major General
6657
Rep 6,727
Posts |
To prevent debris from hitting the calipers and rotors when the cooling is not needed. Also for "approval-related" reasons. Which I would guess means they add drag, which changes the fuel economy rating.
|
Appreciate
2
evanescent031033.00 e46e39g80345.50 |
Post Reply |
Bookmarks |
|
|