Brake Upgrade G37S?

[g37rocket]

hey everyone, i have the 08 G37S and i was looking at upgrading the rotors to drilled/slotted performance rotors. anyone experienced any upgrades first hand and where i can get them and how much they roughly cost?

[Tampa G35 Sedan 6MT]

Yea I was talking about this today. Do you get a lot of brake fade with the 4 piston calipers on the front?

DJ

[Kendahl]

You need better brakes? Will this be for street use or on a road racing circuit? The G37's stock brakes are huge and received many compliments in road tests. Before going to the expense of special, aftermarket rotors, try different pads. One of the aftermarket suppliers should be able to advise you.

[g37rocket]

i've already had to machine my rotors once at about 3500 miles and now i have about 6800 miles on it and i have to machine it again. the dealership say they can't replace the rotors under warranty until it gets down to a certain measurement so i'm just looking at replacement options

[Kendahl]

When your rotors were machined at 3,500 miles, were the pads replaced? Assuming that they were, how badly worn were the old ones? At that mileage, I would expect no more than 10% wear. If the pads were still good, but the rotors needed to be machined, I would suspect defective rotors which should be replaced under warranty. On the other hand, if you used up most of the pads in this distance, the rotor wear may not be excessive. Many years ago, I raced in SCCA Showroom Stock. A set of pads would last 1-1/2 race weekends which was about 300 track miles.

Another (unlikely) possibility is that the brakes are not releasing properly. At the end of a trip, do the rotors radiate a lot of heat?

Your report prompted me to check my own rotors. At 10k miles, I am still on my first set of pads. The rear rotors are completely smooth. I can barely feel some irregularity in the fronts. They probably will need machining or replacing when the pads are used up.

[Tampa G35 Sedan 6MT]

I would upgrade to Ceramic Pads first or when you do new rotors! I still think you need to let them go and have the dealer replace under warranty that way if it happens again they fix it again! Don't put any money into it yet!

DJ

[C-Kwik]

i've already had to machine my rotors once at about 3500 miles and now i have about 6800 miles on it and i have to machine it again. the dealership say they can't replace the rotors under warranty until it gets down to a certain measurement so i'm just looking at replacement options

What is happening to the rotors that you need to have them machined every ~3500 miles?

[g37rocket]

i am going back to my dealership in a couple of weeks but i did tell them whats going on but they said the the warranty department is very strict about replacing brakes, the rotors have to measure a certain measurement before they can replace it and until then all they can do is machine the rotors. and to answer c-kwiks question. the steering wheel shakes when i try to brake especially if i'm on the highway

[Kendahl]

Steering wheel shake points to warped front rotors. The service department needs to look for what's warping them, not just machine them again and again.

[Sentientbydesign]

Sounds like high speed braking to a complete stop. Whenever I do that, I make sure to engage my parking brake (dual rear brake setup on the Gs) and let the rotors and pads cool down.

[g37rocket]

i rarely drive on the highway so there is no high speed braking going on, and you think with good brakes like that a few hi speed braking shouldn't hurt it. after all it is more of a performance car.

[Sentientbydesign]

Somebody made mention of the fact that most drivers have slow reaction times, so in order to make up for that, auto manufacturers use soft brake materials to assist in emergency braking.

Quality aftermarket brakes will outperform in all other areas.

[Tampa G35 Sedan 6MT]

I think they need to dig a little deeper too!



DJ

[RED_DET]

NO way on earth should those rotors need resurfacing after 3500 miles, especially on a daily driver. Sounds like another defective brake issue that will eventually be covered under warranty. Just like with the 03-04 sedans.

[C-Kwik]

Steering wheel shake points to warped front rotors. The service department needs to look for what's warping them, not just machine them again and again.

Its prety hard to warp a rotor these days. Espically one as massive as the G37S brakes. I'd look for a recurring thickness varioation that may have been started by uneven pad deposition. Especially since the vibration came back. This might be a sign that the uneven pad deposition has become cementite and is wearing unevenly. Turning the rotors will only temporarily solve the problem as it will remain smooth only until the hard spot in the rotor begins to become a high spot again.

Read over Myth #1:

http://www.stoptech.com/tech_i...shtml

[EZcheese15]

Not to get away from the subject of fixing the problem with your stock brakes warping, because everyone is right, they shouldn't under normal driving conditions and the G37 brakes are plenty big enough for that.

However, if you are looking for a brake upgrade (which I am), I've only been able to find one company so far that has a kit. Impul sells a kit but is like $8500. However, I'm going to look at simply upgrading the fluid and pads. Carbotech sells pads for the G37. They are around $300 or so front & rear, depending on the compound. But again, normal driving should not requires this. I'm only looking at this because I went through a set of pads in 1 day on the track, and had horrible fade.

[audtatious]

You know you are not supposed to go around the track with a foot on the brake

I'm sure someone soon will come out with higher quality rotors. Personally I would like a set of slotted rotors and will probably get a set when available.

[tollboothwilley]

I bought some rotors from OC Autosport in cali...this was the same thing that Gwoods did when he couldn't find any performance rotors for his 2007.

They cut the rotors themselves so it takes a few days after you place the order. I'd give them a call and see if they can cut some for your car.

[maxnix]

Somebody made mention of the fact that most drivers have slow reaction times, so in order to make up for that, auto manufacturers use soft brake materials to assist in emergency braking.

Quality aftermarket brakes will outperform in all other areas.

Actually, the softer OEM pads have a higher coefficient of friction upon initial cold application typical of street driving.

Track pads are harder because they require a higher coefficient of friction at higher temperatures generated by frequent severe engagement in a track environment. However, because of their temperature profile and hardness, they will result in inferior performance in the typical initial cold stop scenario encountered in typical traffic driving.