I've been having rubbing problems on and off over the past year, and can't seem to fix the problem. It is a rubbing sound that mostly occurs when turning, but has been happening lately just at cruising speeds (going in a straight line). My brake/wheel/suspension setup is as follows:

Mille Miglia EVO 5 17X8
5mm H&R wheel spacers with extended studs (front obviously)
Ingalls camber bolts
Tein Basic Coilovers
235/45 General Exclaims
blehmco BB conversion kit (lines, brackets, hardware, etc)
12.6" slotted 6th gen iRotors
30mm 300zx Calipers

Has anyone else had this problem before with this setup? I believe that the rubbing is coming from the inside of my rotors. I have completely removed the dust shields, that removed almost all the sound, but didn't remove it completely. Could it have to do with the fact that my coilovers are a little lower than a standard drop, and that camber is effecting the angle of the rotor therefore causing the rotor to rub on something? Also, if my wheels aren't torqued down very tight, the sound is even worse. Any help is appreciated.

 

what makes you think it's related to the brakes?

Are you sure you're not rubbing on the spring/strut/coilover assembly anyplace?

 

try to describe the noise
rubbing, grinding, clunking, etc?

off throttle, on throttle?

Lets not start a thread title by bashing a good vendor's product

 

I know it's related to the brakes because I was running the coilovers for about a year before I got the BBK.


It's a rubbing noise that mostly occurs when I turn the corner, but has been happening when I'm just cruising. It also gets worse when there's more weight in the car (goalie bag, person/people, etc). Doesn't matter whether I'm off or on throttle.

I am certainly not bashing his product, I'm just trying to find out if anyone else has had this problem before.

 

I have the same noise, only from the pass side. Stops when I hit the brakes.

 

I remember reading something last night talking about a certain noise that the 300z calipers tended to make on some occasions, that alot of people using those calipers had experienced.

I can't for the life of me remember what thread it was in though!!!

 

I applied brake grease like 2 weeks ago to everything so I dunno what to do.

 

Exactly the same thing mine does. It comes from the passenger side as well.

 

Check your coilover collars first. Please let me know. I had the same issue until I tightened mine. They happened to move 1/16 of an inch during progressive turning. I didn't notice till I pulled off the wheel and was moving the rotor around

 

have you contacted matt about this yet? he's always tremendously helpfull. hell, he helped me diagnose suspension issues for about two months before i even bought anything from him

 

I have the same tires and wheels(18x8forme) as well. Just a different suspension. But it did this with the old tires too. I have yet to contact matt. Maybe he will chime in-in this thread.

 

Kelvo, did you need spacers to fit under the 18 x 8 Evo5’s? Do you know the offset of yours?

I’ll be doing this soon, hesitant to get spacers if not needed.

 

45 offset 5mm spacers. It BARELY hit. I need like 1-2mm spacers haha.

I have a 40 offset on the pass side now since I had a bent wheel and I still need the spacer.

 

That sucks, I have 18 x 8 with +40 offset, and I measured everything it looked so close that I wasn’t sure. Guess I’ll need to get 5 mm spacers.

What sucks more is that it’s gonna force me to get spacers in the rear to make the car look good again.

Hope you guys figure out the noise issue before I finish this up!

 

are you all using iron or aluminum calipers. when i was running iron calipers the gap for the rotors on the iron even though still being 30mm they were a bit more narrow than the aluminum ones. and i would get a rubbing noise. it sounded like the capilers were rubbing too close on the rotors and werent spinning freely. when i switched to the aluminum capilers the problem was eliminated.

 

check and see if the calipers are rubbing against the rotor in a spot. the Z calipers aren't the absolute best on being consistent on the gapping internally. I've seen a few calipers that need a washer to space them around just a bit compared to others.

also take a look at your wheel bearings. I had a noise like that several years ago that I thought was related to my brakes (it started shortly after installing a brake kit).. it wound up being a wheel bearing that was a bit sloppy and causing the rotor to rub against the caliper. replaced the wheel bearing and eveyrthing was fine after that.

 

Well mine makes no noise when initially driving, it starts randomly after braking. and I did have to use washers to space the caliper properly, but I don't remember what side. I will take it apart and put it back together once I find my wheel lock key