OK, so I have the EBC rotors and pads on the car
for about 4 thousand miles now. I'm getting what
feels like the beginning of warped rotors. I don't
feel it for the first couple of times I brake, but
then it rears it ugly head. Strange thing is, if
I am driving alot that day, it goes away later on.
Is there anything that would feel like warping
rotors, but be something else? Or could this
just be winter weather (temps) causing this feel?

Thanks,
-brian

 

what are you feeling?
im still lost

if your steering wheel is bouncey when you hit the brakes, its the rotors.

describe what your feeling..all you might need to do is bleed them.

 

It's a warped rotor feeling, how else to describe.
At slow speeds, lightly put on the brake, the car
seems to brake more at certain points in the
rotation of the rotor.

But like I said, after a while, it goes away. I'm
just wondering if this could be winter temperature
related, or if indeed I have warped rotors after
only a few thousand miles on new rotors.

Hope this explains more.

-brian

 

My warped rotors can only be felt when braking. I feel a pulsation in the steering wheel. I think that you are feeling something else. Especially if it feels like you car responds different to the braking.

 

Sounds like my last set of warped rotors....as the car comes to a complete stop, or just before that, do you feel it kinda grab, then roll 2 feet and grab as it stops....I think that is what you were trying to explain by "the car
seems to brake more at certain points in the
rotation of the rotor". You can try an experiment:

I warped my factory rotors on my Z, and then I drove home through the mountains (5 hr roadtrip), where I managed to put a reasonable amount of heat in them...that made them "less warped" and nearly decent....I was taking it to the dealer for warped rotors a week later, so, I hit a vacant stretch of backroad and did my best to just melt them down (repeated stops from 100 mph or so)....pulled into a friends house with smoke rolling off of all 4 corners....got in ( a while later that night) and the brakes were almost warp free (and the dealer said there was nothing wrong with them...go figure). Just a thought....maybe you can straighten them.....at least for a while (under controlled conditions, of course).

Good luck....

 

Sounds like you have a bit of runout on the rotors. I see you live in VA. so there is probably a lot of humidity in your area. I live in the San Antonio area and have a Nissan pickup that I know has a little runout. When I first start driving and the humidity is high, I get the same pulsating action you describe but, when warmed up, it goes away. At least it used to, it seems to be getting a little worse now. <img border="0" title="" alt="[Frown]" src="gr_sad.gif" />

I don't think running the car to 100 mph and braking hard several times is the best answer. It could do the opposite and make a small problem worse by creating hot spots and additional warping.

In fact, the runout you have now very well could have been caused by braking hard at high speeds. Once you have hot spots, the metal is actually harder (sort of heat treated)in places and normal wear will cause the rotor to wear unevenly because the metal is softer in some areas.

I would take it to a good brake shop and have them examine the rotors for runout and if necessary, get them turned to eliminate the runout. Even that is temporary because hot spots do not go away.

Sorry so long.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by trackbird:
<strong> "less warped" and nearly decent....I was taking it to the dealer for warped rotors a week later, so, I hit a vacant stretch of backroad and did my best to just melt them down (repeated stops from 100 mph or so)....pulled into a friends house with smoke rolling off of all 4 corners....got in
</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">controlled conditions or not, thats very dangerous to do... you can damage your whole system by putting that much pressure on the pistions to a warped rotor, not to mention LOSE your brakes all together if you were to need them afterwards

-go to autozone.
but a new set for 200$

 

I should clarify that by mentioning that my rotors were "ever so slightly warped", it was a minor irritant when coming to a complete stop. I'm not speaking of "diving on the brakes with the dashboard bouncing from the warped rotor". I was trying to build enough heat in them to "stress relieve" the rotors...and yes,I replaced them with a set of OEM brembos within a week or so. It didn't sound like hes warp was all that bad (if it is very much of a warp, there won't be much of a question about what is causing the vibration). I really wasn't generating much more line pressure than normal (at least not an excessive amount), just using the extra heat energy of a high speed stop to add heat to the system, so I was not concerned about piston or caliper damage (it really was only ever so slightly warped). As a side note, most race (and many high performance street compounds as well) ask you to make repeated stops from 35 to 0 (until slightly smoking) and then from 60 to 0 (until the pads get quite hot) and drive for 5 to 10 minutes to cool and go back to repeated 60 to 0 stops to properly bed the pads to the rotors. At the end of this cycle, the brakes will be as hot or even hotter than a couple stops from 100 mph on stock pads (which was fade free). But anyway....just putting a set of replacements on is a good idea (I'm really not trying to argue against that point) and is a safer way to correct your problem. My thought was simply that he has a fairly expensive set of rotors and if it was a mild warp, he may be able to warm them up and stress relieve them and save the cash. I really don't condone this type of behavior anywhere on the street and went well out of my way to a deserted stretch of road to warm mine up that night (and I really try not to do much of that, it dosen't make it much better). Anyway....good luck and be safe about it.

 

Thanks for the replies.

It does indeed appear to be the bane of my existance -
warped rotors. What really sucks is these are almost
new, only been on the car a few thousand miles.
Anyone else out there with these new EBC rotors
having any problems?

-brian

 

Brian,

Check out www.tirerack.com and look up the brembo OEM rotors ($61 each), they have been durable so far and I've not managed to warp them even with Carbotech Panther Plus pads (and they have seen plenty of heat while bedding the pads in). They seem like as good of an option as any, and for $61 each, you could afford to trash a set every now and then (beats $100+ each). I've not tried the EBC's yet....I had considered it but tried the Brembo's instead. Just my $.02....good luck.