11-18-2019, 08:57 AM | #1 |
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Wet M2C Big Brakes??
Noticed that the big brakes on the M2C require the pedal to be pumped a few times to engage after an extended exposure to water during driving or after the car was washed...
Took about 3-4 pumps for me to stop last night after a wash. Almost went through a red light. (pic for attention)
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11-18-2019, 09:59 AM | #2 |
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I haven't had any extreme reactions to the brakes getting wet. There's always SOME reduction in braking with wet disc brakes, but I've had cars that were more sensitive than this one. I did own a car with all drum brakes once...even in light rain the thing didn't want to stop at all, so perhaps I'm just still using that as a comparison almost 30 years later.
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11-18-2019, 10:57 AM | #3 |
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After i wash my car, i'm always wary of stopping for the first time because when these brakes get clean, it takes a good pump to stop em. It's not bad as long as you remember to stop the car in a parking lot or something and then youre back on the road.
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11-18-2019, 07:30 PM | #4 |
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When you use your wipers, the car assumes it's raining and will periodically engage the brakes to keep the rotors dry.
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11-18-2019, 10:45 PM | #5 |
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11-19-2019, 03:25 AM | #6 |
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I am surprised you had this happen with drilled rotors also. I've had this happen with certain pad / rotor combos on some cars, but not on drilled or slotted or OEM pads. Might be that the larger surface area of the 2NH brakes makes it more likely to happen.
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11-19-2019, 01:32 PM | #7 |
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i don't think i ever observed this behavior.
My biggest issue with the breaks since I got the car back in June is the break squeaking. I am at 5k miles and it is still happening unpredictably. I am tempted to take it to the dealership but i am afraid i won't be able to reproduce the problem. |
11-19-2019, 03:22 PM | #8 | |
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Actual fully cross-drilled (not dimpled) brake rotors provide the best performance in rain because they give any water between the pad and rotor surfaces somewhere else to go. If you are having to pump brakes to get them to work under wet conditions (and they work fine otherwise including cold temperatures) with drilled rotors, I would suspect the pad compound is the issue. Also remember that braking under wet conditions is also a function of tire compound, tire pressure, tread design and tread condition. Is it possible that you are focusing on brakes when it's your tires that may be suspect under wet conditions? I've got 370mm drilled rotors front, 345mm drilled rotors rear, Hawk 5.0 pads and 245/40-18 Michelin Pilot Sport 4S tires. I honestly can't tell if the road conditions are completely dry or pouring rain, the handling and braking performance of these components working together as a system seem identical under varying conditions. Hope this helps! |
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11-19-2019, 03:59 PM | #9 | |
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11-19-2019, 04:34 PM | #10 | ||
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11-19-2019, 05:51 PM | #11 | |
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11-20-2019, 11:18 AM | #13 | |
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11-20-2019, 12:42 PM | #14 | ||
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