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02-16-2016, 09:34 PM | #331 | |
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The calipers on my car are about 30,000kms old and at least 60% of the dust boots are completely shot. The pistons themselves look in fine condition though. I'm using upgraded pads, ECS 2-piece rotors, Ti shims and no dust shields. In those 30,000kms over 3 years I've done maybe 10 or so circuit days.
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02-17-2016, 06:01 AM | #332 |
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Right - I get that it's different... I saw somewhere in the thread a request for comparison to high milage calipers, so I was just sharing what I saw.
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02-18-2016, 08:28 PM | #333 | |
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Yeah I have an E88 135i with 148,000kms and the dust caps and pistons on those were fine. I've tracked it maybe 2-3 times but using stock brake pads but nothing like how I've tracked the E82. The E82 also has a lot more power and better pads so will generate a lot more heat.
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07-09-2018, 05:04 AM | #334 |
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Backing plate for brake cooling
By way of comparison, this is what a race-specific cooling plate looks like. I run these on my Spec3 race car. Notice the flange is angled slightly towards front and that air is directed to center of hub/rotor to force flow into and through cooling veins.
http://www.bimmerworld.com/BrakeCool...es_E36__WM.jpg Better yet, e82 specific part: http://www.bimmerworld.com/E9X-E8X-N...ate-Right.html |
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06-21-2021, 05:14 PM | #335 |
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I bought an 08 135i with 88,000kms a month ago. Brakes became very noisy last few weeks. Pulled brakes apart to inspect/service- still had around 5mm pad front and rear. Came to find the caliper pistons are all badly corroded to the point they are crumbling apart. Have never seen this before on any vehicle ever. Been a technician for 10yrs. Any explanations?
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06-21-2021, 06:45 PM | #336 | |
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EDIT** Just noticed I linked back to this same thread... oops |
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06-22-2021, 03:56 PM | #337 | |
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06-24-2021, 07:42 PM | #338 |
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This. The brakes are quite good and durable once shims and metal pistons are done. Remove the "ears" and switch to true 2pc floating rotors and they're not even that heavy.
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06-25-2021, 08:04 AM | #339 |
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Ears are f'ing 1.4 pounds per corner!
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06-25-2021, 10:13 AM | #340 |
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Indeed. And serve no detectable purpose that I can feel.
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06-25-2021, 10:19 AM | #341 |
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Probably to mitigate brake squeal.
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06-25-2021, 11:28 AM | #342 |
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06-25-2021, 03:16 PM | #343 |
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I know, right?
Brake harder and shorter and the brake squeal goes away, anyway.
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10-31-2021, 04:54 PM | #344 |
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It's good practice to clean your calipers after every race weekend. Especially around the pistons. Simple green works well using a small nylon brush similar to a tooth brush. And rinse throughly with water, dry with micro fiber. What happens is the piston get jammed up with brake dust and prevents them from retracting smoothly or fully which can cause dragging on the rotor and excessive heat. We do this in motorcycle racing at the end of every day during a race weekend and it makes a big difference. Cheers 🍻
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02-27-2023, 11:24 AM | #345 | |
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Check your rotors for scoring. Sometimes a small pebble or other debris can get wedged in the pad and cause all kinds of noises and damage to the rotor.
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