05-12-2024, 04:15 PM | #23 |
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The 1521 is a street-only pad and it is not designed to handle the higher temps of autox and the track. You’ve likely glazed the pads from overheating them. Still not sure what’s caused the grooves but it could be a result of fading them but that typically glazes them. I assume the rotors had oem pad material on them before installing the 1521? Did you bed-in the 1521 pads?
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05-12-2024, 04:28 PM | #24 | |
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05-12-2024, 05:16 PM | #25 |
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Is it the 2NH calipers with F/R 380/380 mm rotors? That’ll shift the bias rearward a bit due to the reduced mechanical advantage of the F calipers. I may have looked at 2NH with 380/370 but not 380/380.
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05-12-2024, 07:45 PM | #27 |
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05-13-2024, 08:35 AM | #28 | |
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2021 M2 Comp Sunset Orange |Black with orange Stitching Dakota Leather|Executive Pkg|DCT
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05-13-2024, 12:36 PM | #29 |
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If you can, I’d pullout one pad and look at the condition of the pad compound. If it is really shiny the pad is glazed. You’ll have to pullout all pads and start with a coarse sandpaper and finish it off whine a fine sandpaper when the surface looks dull. The pad material also can be cracked when overheated. If there are significant cracks running completely across the pad then it creates a safety issue.
If the pads look fine then I’d strongly recommend rebedding them even if XP12 was already on there. With only a small amount of running the XP12 on the street then there’s a good chance the pad material was worn off. |
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