Drilled, slotted brake rotor noise comments
#1
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I'm trying to improve the poor braking on my gorgeous 2001 XK8 in any financially sensible fashion possible. And am considering upgrading to drilled rotors. But have had bad luck with eBay-china drilled&slotted rotors on my other vehicle. The problem is that after 40mph they Buzz like a fan. Then when you press the brake it sounds embarrassing next to others! Sad part is.... Darn things STOP Great!!!
Have heard soo many conflicting opinions ( it's the dimples. - it's the slots)
I wanted to hear what you all have experienced.
I love this car and don't want to "ricer" it with sillyness.
Have heard soo many conflicting opinions ( it's the dimples. - it's the slots)
I wanted to hear what you all have experienced.
I love this car and don't want to "ricer" it with sillyness.
#3
#4
#5
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I will be putting these on mine soon with Hawk HPS pads
Mark Link
Diversified Cryogenics
2180 County Road 42 West
Burnsville, MN 55337
ml@frozenrotors.com
www.frozenrotors.com
I put plain frozen rotors on last XK8, and did notice slight sandpaper noise when braking.
Mark Link
Diversified Cryogenics
2180 County Road 42 West
Burnsville, MN 55337
ml@frozenrotors.com
www.frozenrotors.com
I put plain frozen rotors on last XK8, and did notice slight sandpaper noise when braking.
Last edited by stevepaa; 01-25-2013 at 01:22 PM.
#6
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Properly installed, you should have no more noise problems with drilled, slotted, etc rotors than standard types. Did you do the work on your other cars yourself? Did you put anti seize grease or a "disc brake quiet*" product on the back side of the pads?
* don't use on pads that have shims. You may use anti seize on all types.
* don't use on pads that have shims. You may use anti seize on all types.
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#8
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Frog (01-25-2013)
#10
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![Drilled, slotted brake rotor noise comments-xk-4.2-s-front-brembo.jpg](https://www.jaguarforums.com/forum/attachments/xk8-xkr-x100-17/31260d1480967494t-drilled-slotted-brake-rotor-noise-comments-xk-4.2-s-front-brembo.jpg)
Although they have completely different part numbers, the fact they are exactly the same price suggests it's nothing more than a cosmetic difference.
Also they both take the same pad set.....
Graham
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Frog (01-25-2013)
#11
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#12
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The sales and advertising at the time made much of the introduction of red Brembo calipers on the 'R' without giving any technical details on the difference between these and the silver Brembo ones.
Attachment 31260
Although they have completely different part numbers, the fact they are exactly the same price suggests it's nothing more than a cosmetic difference.
Also they both take the same pad set.....
Graham
Attachment 31260
Although they have completely different part numbers, the fact they are exactly the same price suggests it's nothing more than a cosmetic difference.
Also they both take the same pad set.....
Graham
They take the same pads as both later types of caliper
No problem with any additional noise with the cross drilled discs incidentally
![](https://www.jaguarforums.com/forum/attachments/xk8-xkr-x100-17/31263-drilled-slotted-brake-rotor-noise-comments-brembo3aug2010001.jpg?dateline=1359157178)
All the best
NikasilNik
Last edited by NikasilNik; 01-25-2013 at 05:41 PM.
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GGG (01-25-2013)
#13
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NikasilNik (01-27-2013)
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NikasilNik (01-27-2013)
#15
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Let's be clear about why anyone would spec different rotors (discs) or calipers.
1)Cross-Drilled rotors helps prevent warping of the rotor by releasing heat and cooling the rotor by up to an additional 105 degrees Fahrenheit when compared to non-driled rotors.
2)Slotted brake rotor reduces debris and prevents brake pad glazing by capturing and removing debris as you brake and drive. The end result is better braking, longer pad life, and reduction in unnecessary rotor wear.
3) Material is usually a grade or Iron compound called G3000, alternative higher carbon content discs have a (slightly) higher co-efficient of friction.
4) Pads, metallic, ceramic, exotic compounds, all effect braking, choose the right one for the kind of driving you do.
5) Calipers, bigger , more pistons, better L-R balance all = more stopping power.
6) Big stuff looks good, especially to small boys:-)
1)Cross-Drilled rotors helps prevent warping of the rotor by releasing heat and cooling the rotor by up to an additional 105 degrees Fahrenheit when compared to non-driled rotors.
2)Slotted brake rotor reduces debris and prevents brake pad glazing by capturing and removing debris as you brake and drive. The end result is better braking, longer pad life, and reduction in unnecessary rotor wear.
3) Material is usually a grade or Iron compound called G3000, alternative higher carbon content discs have a (slightly) higher co-efficient of friction.
4) Pads, metallic, ceramic, exotic compounds, all effect braking, choose the right one for the kind of driving you do.
5) Calipers, bigger , more pistons, better L-R balance all = more stopping power.
6) Big stuff looks good, especially to small boys:-)
#16
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Drilled and slotted rotors actually reduce braking force. What they do is to allow water to be removed more rapidly in the case of track situations. They do add to the cooling somewhat by allowing air to enter the ventilation space between the disks at multiple points to be exhausted out the edge. Pad selection is important to restore the force from lost braking area from the slots and holes. For drilled and slotted rotors, a more aggressive pad is needed to keep the braking force up. Most aggressive pads require more heat to function, and this can be a problem in a street car. If you have high performance pads, you will notice that the brakes are weak until you get them hot. They also tend to be squeakier. Unless you drive your car on the track or at high Autobon speeds, stick with the factory original brakes, they actually are better to live with..
#17
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#19