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Thread: Drilled, slotted, dimpled?????????

  1. #1
    LXi User Chrome_thangs's Avatar
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    Drilled, slotted, dimpled?????????

    what is the advantage of getting the drilled or slotted rotors? My stock rotors are warped and old and need relacing soon. Should i get bigger rotors? if so what size? I'm looking for optimal stopping power. Any suggestions?
    2.25 Sprint drop w/ Bilstien struts in rear & Koni's in the front, moddified 94-97 Accord CAI, JDM power folding mirrors, Prelude A arms, Naxos exhaust, K&N Filter, Accel coil, Advanced timing, NGK-R plugs, 7.5mm wires, Apc H4 headlight conversion, PIAA hyper plasma bulbs every where, 17" Exel Maj rims wrapped in 205/40 17 Kumho tires, w/ 5% platinum tint, painted calipers & drums, shaved tail lights, moldings, antana, squirters, and emblems, Clarion DRB3675 head unit w/ Clarion 6x9s



  2. #2
    SEi User TeKKnoTeKK's Avatar
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    I believe the advantage of them is to keep the rotor cooler during allowing it to breathe, I could be wrong tho
    -Aaron-
    "I play russian roulette everyday, a man's sport, with a bullet called life"



  3. #3
    yea, it's to allow for gasses and debris to have a path of escape. Larger rotors have a larger surface area and therefore offer better stopping power and their larger overall surface area allows them to disipitate heat at a faster rate so you don't get the dreaded overheated rotors (once the temperature gets too high you loose the friction between the pads and rotors)
    Eric
    3geez member since October 12, 2000
    "All this worldly wisdom was once the unamiable heresy of some wise man." - Henry David Thoreau

  4. #4
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    drilled rotors tend to crack
    slotted rotors are better
    but both are definitely better than stock or just air cooled rotors
    for dissipating heat

    to get bigger rotors u'll need to the upgrade kit which is not cheap
    oldswapschool has done it...and there's none for our cars afaik

  5. #5
    SEi User TeKKnoTeKK's Avatar
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    I think the drilled/slotted rotors are less likely to warp also because of less heat.
    -Aaron-
    "I play russian roulette everyday, a man's sport, with a bullet called life"



  6. #6

    AZmike's Avatar
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    They'll still get just as hot during braking. The energy of the moving car has to go somewhere. The holes give the rotor more surface area and promote turbulent airflow. This makes the rotor cool faster (less fade after repeated hard stops), but doesn't prevent them from reaching the same high temperatures. I've also heard that cross-drilled rotors frequently crack, but I don't have any experience with it myself.
    Mike

  7. #7
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    I was the slotted/dimpled rotor runner ( man that sound weird). They were dimpled for 2 reasons. They avoid the cracking issue my not being drilled all the way through. And I've heard that cross drilling effect the balance of the rotor because some of the material that the manufacture has in place for balance gets removed during the drilling process. Find my post in this thread to hear how I felt about their performance and to get an idea of how I tested mine.

    https://www.3geez.com/showthread.php?s=&threadid=4715
    H&R springs revalved Bilstein front struts, koni struts in the rear 195/55-15 Dunlop W-10's Dc Sports header custom cat-back with Dynomax super turbo w/3" Brembo slotted & dimpled rotor's EBC pads
    Well, that's what I used to have, wrecked, 7/3/02.

    Now I d

  8. #8
    3Geez Veteran
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    And price wise I can't complain, I got them for $100 for the pair.
    H&R springs revalved Bilstein front struts, koni struts in the rear 195/55-15 Dunlop W-10's Dc Sports header custom cat-back with Dynomax super turbo w/3" Brembo slotted & dimpled rotor's EBC pads
    Well, that's what I used to have, wrecked, 7/3/02.

    Now I d

  9. #9
    lol I thought "dimpled" was a joke, I didn't know they made those
    Eric
    3geez member since October 12, 2000
    "All this worldly wisdom was once the unamiable heresy of some wise man." - Henry David Thoreau

  10. #10
    3Geez Veteran
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    :lol yep sure do, he's a closeup of them on my car
    H&R springs revalved Bilstein front struts, koni struts in the rear 195/55-15 Dunlop W-10's Dc Sports header custom cat-back with Dynomax super turbo w/3" Brembo slotted & dimpled rotor's EBC pads
    Well, that's what I used to have, wrecked, 7/3/02.

    Now I d

  11. #11
    3Geez Veteran ACCORD EX's Avatar
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    looks nice ! :super:

    MIKE
    3geez member since October 4th 2001

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