Complete IS-F Brake Thread (Under-construction)
#586
Racer
iTrader: (3)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I’ve noticed some rotors come thoroughly covered in oils. I had problems bedding pads on another car (the first time I tried to bed pads ever), and it didn’t work well. Long story short, I should have degreased the rotors. It probably would have helped. I suspect my problem was also related to some faulty autozone pads, but I won’t get on that soap box.
#587
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I’ve noticed some rotors come thoroughly covered in oils. I had problems bedding pads on another car (the first time I tried to bed pads ever), and it didn’t work well. Long story short, I should have degreased the rotors. It probably would have helped. I suspect my problem was also related to some faulty autozone pads, but I won’t get on that soap box.
It can be anything oily and rust preventive. Cosmoline is pretty unlikely because it's really hard to remove. Brake cleaners are designed to remove all oils from the disc's surface, and you should always finish with a shot of brake cleaner on both sides of the rotor just before you put the wheel on.
#588
Moderator
![](https://www.clublexus.com/forums/images/ranks/rank-mod2.gif)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I’ve done a lot of brake jobs and never cleaned them. Maybe that’s wrong, I just never thought of it. On my last set of autozone rotors and pads on the pilot, I followed a solid bedding strategy and let them properly cool on the interstate. They bedded unevenly, hummed and gave a slight shimmy to the car. Fast forward to when I had the rotors turned down and put OEM pads on, and the car runs fine. It was my first experience with issues in brand new brakes. I still don’t really know what went wrong.
#589
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Brake pads never "lay flat" especially on drilled rotors. I've been through 5 sets of OEM/OEM style rotors on the front and at least 8 sets of pads not including 3 sets of track pads. The process you described sounds bizarre compared to my experience. I've never needed more than a single bedding with any pad other than the HC+800. It really sounds like there was some residue on the rotors if they were incapable of bedding NS400s on the first try.
#590
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I’ve done a lot of brake jobs and never cleaned them. Maybe that’s wrong, I just never thought of it. On my last set of autozone rotors and pads on the pilot, I followed a solid bedding strategy and let them properly cool on the interstate. They bedded unevenly, hummed and gave a slight shimmy to the car. Fast forward to when I had the rotors turned down and put OEM pads on, and the car runs fine. It was my first experience with issues in brand new brakes. I still don’t really know what went wrong.
#591
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
So would you guys still suggest ordering from rockauto? Need to replace my front rotors with the BREMBO (coated) for the next autocross event. I've replaced my pads with EBC yellows and noticed some steering wheel shake under normal braking around 40mph.
#592
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I have rotors from Rock Auto on the wife's GS F. They work just fine.
#594
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
After years and years i'm finally getting some 2 piece rotors on the car tomorrow from RR Racing. I think I have about 50% left on the stock OEM pads which I love, but wondering if I should replace them with the Carbotech 1521 pads since I'll already have the brakes apart. Anyone able to comment on how they compare to OEM pads? I definitely don't' want to take a performance hit and I just can't go with pads that squeal and from what I've read any of the Carbotech XP8's and up make noise.
#595
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I had strange tapered wear issues with the 1521s. I have not run them since.
The following users liked this post:
caymandive (05-15-23)
#597
Tech Info Resource
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I'm running PowerStop pads from Rock Auto on both my F cars right now. They're cheap and they work fine for street duty. The GS F has the Z23 pads, and they have good feel as well as being quiet. Not great feel - definitely don't feel like race pads, but they're quiet, cheap, work well, and last a long time.
FWIW, I bought the Z26 "Street Warrior" pads for the IS F and they definitely do not feel as good as the Z23 pads. Significantly more pedal effort with Figs 2 piece rotors than the Z23 with OEM Brembo rotors on the GS F.
FWIW, I bought the Z26 "Street Warrior" pads for the IS F and they definitely do not feel as good as the Z23 pads. Significantly more pedal effort with Figs 2 piece rotors than the Z23 with OEM Brembo rotors on the GS F.
Last edited by lobuxracer; 05-15-23 at 03:20 PM.
The following users liked this post:
caymandive (05-15-23)
#598
Pole Position
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I've been happy with Endless MX72 pads for years now both stock Brembo rotors and the 2 piece Giro discs from RR Racing. They do dust like the stock pads though, but worth the tradeoff for me for the performance they offer.
The following users liked this post:
caymandive (05-15-23)