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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 08-13-2013, 04:20 PM   #1
ONE LOVE
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Stoptech ST40??

I currently have an 06 ZCP M3. I was at Auto Club Speedway over the weekend and toasted the ZCP rotors.... Now Im driving around with warped rotors and feels like crap! Here is my question. Do I get new pads and rotors/ SS lines and fluid...... Or do I just get the Stoptech ST40 front kit and call it a day? Any opinions or experience on track with both set ups? I drive very hard, not just fun track days. I actually go for time! That considered will the ST40 benefit me? Thank you
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Old 08-13-2013, 04:32 PM   #2
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You likely have pad deposits on the rotors from your pads. some have taken emery cloth and removed said deposits. give it a shot. (not sure exactly how hard you ran but i doubt your rotors actually warped)
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Old 08-15-2013, 10:58 AM   #3
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No opinions????
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Old 08-15-2013, 11:57 AM   #4
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The ST40 is a nice kit for sure, but for a 4 piston kit you could easily pick up a TAROX 6 piston kit for close to the same price.

I guess the real logical question is, do you really need a big brake kit? How often does your car see the track? In most cases, a high quality set of pads and discs will suffice.
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Old 08-15-2013, 03:41 PM   #5
ONE LOVE
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I track every weekend! I have not used upgraded pads / rotors/lones/fluid yet. I figured I would skip a step and get the ST40.... But I hear a good set up will suffice. Hmmmm
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Old 08-25-2013, 10:06 AM   #6
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any updates? i had a similar issue my last trip to the track. i would get some good vibrations when braking from about 80+mph but can't really notice any difference at lower speeds. there's a visible change to the rotor surface. i haven't been in the game long enough to recognize if it's pad deposit or damaged rotor surface. i have read that some people will use a fine grit (300ish?) sandpaper to remove those deposits. afterwards, supposedly you just re-bed the pads and are good to go. worth a shot? i kind of want new rotors so i am hesitant to try just in case it works, then i don't get to buy new goodies, haha.

so what are you gonna do? since you track every weekend you've probably been out there again since you first posted... good luck!


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Old 08-25-2013, 10:57 AM   #7
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Old 08-27-2013, 10:40 AM   #8
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Quote:
Originally Posted by ONE LOVE View Post
I track every weekend! I have not used upgraded pads / rotors/lones/fluid yet. I figured I would skip a step and get the ST40.... But I hear a good set up will suffice. Hmmmm
A well thought out and executed pad/disc setup will suffice. Just be mindful of the components you select, not all are created equal!
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Old 08-27-2013, 12:32 PM   #9
ONE LOVE
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Ok. What rotor do you guys recommend for a ZCP application? Stock replacement? Also what pad is a good 80% track 20% street? Thanks
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