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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 08-08-2003, 09:55 AM   #1 (permalink)
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Does anyone have any experience with either drilled, slotted, or drilled/slotted rotors? I've heard mixed reviews on all (not worried about brand here, just the technology itself), to include some people saying they crack, or wear much quicker than regular rotors. Anyone have any information from first hand experience?
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Old 08-08-2003, 12:26 PM   #2 (permalink)
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i have x drilled on my car...reason being...i warp normal rotors to easily...stopping distance seems to be somewhat improved... oh and they look good
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Old 08-08-2003, 12:27 PM   #3 (permalink)
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oh ya they dont seem to wear out much faster than regular rotors and mine have yet to crack
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Old 08-08-2003, 12:30 PM   #4 (permalink)
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I read a 30 page thread on the diffrence a while back. I will try to find the link It is a really good read.
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Old 08-08-2003, 12:37 PM   #5 (permalink)
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Brake thread

This is about all you need to know about brakes. Follow the guy with the handle COBRA.
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Old 08-08-2003, 12:40 PM   #6 (permalink)
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Thanks guys!
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Old 08-08-2003, 12:56 PM   #7 (permalink)
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We did change the OEM rotors on our project car into air vented drilled rotors made by CAR.

No problems in braking, distance reduced, and even emergency braking is not harming the discs (so far)

And it looks better.

CAR air vented disc on a 4 lug E30 front:
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Old 08-08-2003, 01:33 PM   #8 (permalink)
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This guy is sooo right, except for one little thing. Bigger brakes don't necessarily mean more friction. Formula 1 cars use very small brakes (they use small wheels with big tires so there's no place to put big brakes) but they use very abrasive brake pads, so the added abrasiveness, while extremely bad for the rotors (new ones ever track outing) it makes up for the reduced friction surface.
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Old 08-08-2003, 01:57 PM   #9 (permalink)
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triggrhaapi,

The braking surface is the same on the vented discs as on the OEM once.

We din't perfom test before/after the change - so the reduced braking distance
may have been in our minds.

But, its like driving after a oil change, the car is better - isn't it
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Old 08-08-2003, 02:27 PM   #10 (permalink)
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Quote:
Originally posted by Nikis Place@Aug 8 2003, 01:37 PM
The braking surface is the same on the vented discs as on the OEM once.
Well, you have to think about how you lost surface area with all the holes and groves in the rotor...
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Old 08-08-2003, 02:28 PM   #11 (permalink)
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Fruity - what brand are you running? Do you notice less brake dust? Is that your hand on my lap? Are you eating pads quicker? What's the square root of 4? How much did they run you (total, front and back)?
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Old 08-08-2003, 07:11 PM   #12 (permalink)
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surface area doesnt mean squat if your brakes are "floating", the purpose for vented brakes is to release the gases and whatnot that give your brakes the "floaty" feeling. by accomplishing this you create a better braking surface and a more responsive brake.
i personally think that slotted are better they dont have a tendency to crack and brake with high temperature braking for long periods of time, from what ive read about them is that a lot of cross drilled companies drill the holes after the brake rotors are made making the actual rotor weaker than it was suppose to be, now im hearing that they have found ways to fix this problem,
i dunno if any of you guys from bmwplanet remember that rash of broken and cracked cross drilled rotors a few years ago?
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Old 08-09-2003, 02:38 AM   #13 (permalink)
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Allow me to add following text to this discussion:

Taken from CAR catalogue, section "The Safety"

The innovation and the principal puculiarity of HIGH Performance brake discs, produced and distributed by CAR is the special machining of braking surfaces with holes alternated to transversal carvings.
This has been studied and exclusively tested in order to obtain greater efficiency of the braking system, to allow a quicker cooling and to elimate the slags and the gas penetrated by the friction of the brake pads. Also the fading process is largely reduced.
The incremented friction coefficient brake disc-brake pad assures safer braking for a longer time. The new line of high performance brake discs guarantees higher saftey in both every day and sproting driving conditions.

Price for a set ( 4 wheels) E36 coupe around 300-350 dollars shipping included.

Brake section will be updated in the catalogue by monday.
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Old 08-09-2003, 02:39 AM   #14 (permalink)
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Of cause,

if you want "BIG Brakes" then it's brembo or Mov'it - or the ACS sets.

Thats whole other story and budget.
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Old 08-09-2003, 10:46 AM   #15 (permalink)
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hey green dragon....are those 17" wheels...or 16"?? i really like them and was looking in the bmw catalog...thinking about buying them. they look sharp. just trying to figure out what they may look like on my ride.
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