The Random E46/ZHP Question Thread

[YoitsTmac]

if akebonos fade easily, would running drilled rotors help to reduce the fade?

I would say slotted before drilled. But if you're saying that because of what I said, I can't recommend the PFC-Z pad enough (bimmerworld only). Lot of modulation when cold, but one hard stop and it bites at the top for the rest of your life. The dust is comparable to OEM but its the pad that never gives up. I know I am in a 328 but I am running 330 brakes. Just my two cents on pads if you're in the market. I did a CCA drive and was hustling behind an 11 ZCP M3 and experienced no fade. It can start to squeal a bit after lots of aggressive stopping but it goes away when they cool back down.

[papa_g]

Ok good to know. I actually have akebono ceramics and zimmermann drilled coming, so kinda stuck with them now. But I am not an aggressive braker, and I think anything will be better than my current situation. Previous owner "pad slapped" the brakes, so i running original rotors on new pads; braking power is there, but only when pressing hard. Also the squealing is driving me crazy

[704sw]

if akebonos fade easily, would running drilled rotors help to reduce the fade?

My understanding, from everything I’ve seen, read, and heard, is drilled rotors are really about aesthetics, and slotted rotors are for performance (drilled discs crack). Admittedly that’s more about extreme-stress driving, but I’ve never been able to look past that fact.

[cornercarver]

I would say slotted before drilled.

There have been endless debates on this, but one thing is for sure; Slotted rotors do not reduce brake fade. If anything - they worsen the condition.

Plain rotors, with respect to heat dissipation, are better than slotted. Slotted rotors increase the coefficient of friction, thereby adding heat. Sure, they're 'better' because they improve braking power, but at the cost of increased heat. (There's also some benefit from slotted/drilled rotors because they remove any gas buildup between the rotor and pad when the pad material off-gasses at high temps.)

Best way to reduce brake fade: Bigger, thicker rotors (more mass) and cooling ducts. The performance benefit of drilled rotors is debatable, and if you buy a cheap product you're likely to experience cracking/failure. Porsche has been putting drilled rotors on their cars for decades... They serve more than one purpose, and I guarantee you the original intent was not for 'looks,' but they're a much higher quality product than all the crap that makes its way over here from China.

(ps: if you've ever seen F1 rotors (prior to the advent of carbon-ceramics) they have never used drilled or slotted rotors.)

[Dual]

I ran drilled Zimmermans on my previous car (Porsche fwiw) with no difficulty except that the holes would sometimes cause freezing/filling problems in winter. I wasn't driving the car on the track so fade wasn't something I had experience with. The biggest benefit I saw was in wet driving, and the improvement there was substantial. I never encountered cracking or warping. I think some members of the online group warned about warping, whether from direct experience or hearsay I can't recall.

[san]

Yay or Nay?

https://www.apexraceparts.com/access...nter-caps.html

Personally I think they look good but I also think they look like are a rip off of the BBS red caps.


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[holyc0w]

Yeah, I read that drilled rotors can help with the water issue.

Anyway, I ordered Zimmermann blanks and Stoptech Sport pads. Meanwhile, I'm taking it easy on my brakes.

[johnrando]

Yay or Nay?

https://www.apexraceparts.com/access...nter-caps.html

Personally I think they look good but I also think they look like are a rip off of the BBS red caps.


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I'm not really feeling those red ones. You want red vs the BMW std ones?

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[Newjack]

Yay or Nay?

https://www.apexraceparts.com/access...nter-caps.html

Personally I think they look good but I also think they look like are a rip off of the BBS red caps.


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I can't seem to find any good pictures of those caps on a set of apex wheels. I'm leaning towards no, but if I actually saw a good photo of them it might change my mind.

I love red caps on red cards and more specifically, white cars with silver wheels just like Derbos M3. That tiny red accent really pops off the car, like Dimples of Venus on a woman's lower back.

[san]

I'm not really feeling those red ones. You want red vs the BMW std ones?

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I think I’ll stick with the bmw ones I have. Just thought il see what you guys thought...


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