MHB1535

The brakes feel normal. Car stops on a dime. No vibrations nor are the brakes pulsating. I'm pretty sure the pads are near their end just based on the miles on car and type of brake pad.

Katrcf

iTrader: (2)

I regularly track my hellcat. 10000 miles, on my fourth set of brakes and tires, haven't changed a rotor yet. I'm ready to change pads trackside if necessary. Still haven't changed a rotor. My gf is starting to get pretty aggressive with her RCF at the track. Same appx 10k miles, on her second set of tires (+ a set of pssc2 for track) and still on original pads. I am ready to change pads when needed, won't be changing rotors.
as previously mentioned, in today's cars, you should be able to feel a rotor (especially front) problem in the pedal response.
Mainly look for a pulsing or vibrating feel. Anything different from the normal feel should be suspect. A grabbing brake is also suspect.
as brakes are a very important feature, consult an expert if any of this is confusing. And I mean a real mechanic, not the Internet!
your dealer may not have your best interests at heart, get an independent opinion.

lobuxracer

iTrader: (2)

Unfortunately, no, they're not racing brakes. Not even close. But to comment on some of the questionable things in this thread - yes, rotors of any type can be resurfaced however, it's almost always a bad idea. You are only removing metal that could be absorbing heat (which is what brakes do - not actually stop the car which is what tires do), and unless you've overheated the brakes and developed cementite hot spots, there is no reason at all to remove a brake rotor from service until it is at minimum thickness (unless you just don't like the way it looks and you are OK with replacement costs - read "vanity").

If you track your car, you will likely have rotor cracking. If it exceeds factory limits (more than 46mm), then you would be wise to replace the rotor regardless of thickness. More information about this is in the attachment. Print this out, hand it to your SA and ask to see in person which of the parameters is not in spec. You will save a lot of money.

MHB1535

Thanks for the rotor parameter sheet. I'll probably go to an independent shop and get the brakes checked out. Thanks everyone for all the help. I'll keep this thread updated.

cosmo1

I had my brakes replaced at 23k because of the squealing noise. Everything covered under the tsb and had them reflash for the slow tranny shifting..

SmurFPwr

what year us your RCF? and how long ago did you have them changed? I have the squealing noise as well, but I'm at 17k miles didn't want them to say that it was to late due to mileage.

gs400998

23k miles seen low on pads life. Pads on my previous LS, GS all last longer than 23k. Do you track your RC F? How hard do you drive your RC F on a daily basis. Just curious......

cosmo1

Im guessing its really up to the dealer since the pads are a wear item but mine took care of me. My rc-f is 2015 and my dealership is located in Mobile, AL.

SRTISF

iTrader: (1)

Does anyone have any experience with aftermarket pads? I have a set of Hawk 5.0's on the ISF and love them. The HP Plus pads were a bit much for the street as they make tons of dust and squeal. I looked to see if Hawk makes pads for the RCF and came up dry. I think the stock pads don't have enough bite when you are doing light braking. Don't get me wrong, they are great pads for stockers but I prefer a bit more bite. I was actually pretty impressed with the stopping distance and fact the car will do 1G of braking force.

lobuxracer

iTrader: (2)

Pads can't change stopping distance. They only change your perception of how the brakes work by changing the feel of the pedal. If the pad is capable of locking the wheel, it is not the limiting factor in stopping distance. Tire selection has more to do with stopping distance than any other piece in the chain of devices we use to stop a vehicle.

Pad choices right now are pretty limited. I have Project Mu HC+800s on my IS and love them. They are the kind of pad that would make you feel like they improve stopping performance on a single stop (but I know they don't, they just need very little pedal effort to generate a full performance stop and require foot recalibration - they are so high friction they will overpower ABS and lock the wheels if you hit them hard). I had HPS on my Supra and replaced them with Project Mu HC because I like the feel on the IS better than any street pad I have used. Now the Supra has a very light pedal feel too. These pads are not available for the RC/GS F calipers.

If you want low dust, you won't find a pad with high friction. If you don't mind dust, there are a few choices, none are inexpensive.

Bayernfan

Just brought mine in for 25K service. The front pads are 4-5 mm and the pad backing is 3mm from rotor lips. The rear pads are 7-8 mm and all rotors are dished.

My SA told me that their new SOP is changing rotors with every brake pad change with the RC's. Was also told that since the rotors are slotted, they cannot be machined. I asked about the LSB and was told to do that, the front and back pads and rotors had to be replaced at my cost. Front pads and rotors -$1500, rear pads and rotors $1500. I asked about OEM front pads and rotors only, that cost is $1300. Looks like I am gonna do it myself

troyhuynhv

if thats the case I need them at 10k damnit

lobuxracer

iTrader: (2)

Did they happen to mention how thick the pads are when new? At 4mm you are at 45% available wear remaining before you reach minimum thickness. Distance from the backing plate to the lip isn't a big deal at all. What is a big deal that isn't mentioned here is how thick are the rotors? I have heard many dealership horror stories telling owners they "only" had 4mm of pad left, but without knowing what the original thickness was, that number is meaningless. Same with rotors. They like to throw an absolute number at you thinking you know nothing about the brakes, and end up selling you rotors that still had 50% of their service life left. The tech sells them on eBay (yes, I have bought OEM rotors this way) and they are perfectly good - I used them at the track!

FWIW - RC F numbers:

Front brake pads Standard Thickness: 9.75 mm (0.384 in.)

Minimum Thickness: 1.0 mm (0.0394 in.)

Front rotors Standard Thickness: 34.0 mm (1.339 in.)

Minimum Thickness: 31.0 mm (1.220 in.)

Rear brake pads Standard Thickness: 11.68 mm (0.460 in.)

Minimum Thickness: 1.0 mm (0.0394 in.)

Rear rotors Standard Thickness: 28.0 mm (1.102 in.)

Minimum Thickness: 26.0 mm (1.024 in.)

Finally, there is no reason the rotors can't be machined, but why would you want to? All you are doing is removing the metal that is there to absorb heat. I never machine rotors, and I've never seen a rotor turned on a brake lathe that I would run on my car. The factory uses a centerless grinder to surface the rotors, and the same centerless method will resurface them with an identical finish to what the factory provided. The hard part is finding someone who will do this, but IMHO it is the only way to fully restore braking performance if you insist on cutting your rotors.

mjeds

rockauto has Stoptech Slotted Centric Rotors for the RCF for $86-$120 (rear/front)

http://www.rockauto.com/en/catalog/lexus,2015,rc+f,5.0l+v8,3310304,brake+&+wheel+hub,rotor,1896

and Stoptech Centric pads for $38-$56 per axel, be advised the rears require a separate purchase of the "wear sensor wire" as it is not built into the pad:

http://www.rockauto.com/en/catalog/lexus,2015,rc+f,5.0l+v8,3310304,brake+&+wheel+hub,brake+pad,1684

rear wear sensor wire:

http://www.rockauto.com/en/catalog/lexus,2015,rc+f,5.0l+v8,3310304,brake+&+wheel+hub,brake+pad+wear+sensor,10283


so ~$400 in rotors and ~$200 in pads, and 2 hours of your time to do it yourself, or $3000 at the dealer.. your choice.

jhalb

i just took my car in bc it was squeaking. got it end of yr 2015 and it had 13,000 miles on it. they r telling me i need to pay $1250 to replace front brakesand rotors add tx and shop supplies. is that normal?? seems absurdly quick to need new brakes i dont think i even drive aggressively