phoward

Hi, I own a My01 (My02 in US) WRX with 90.000Km (60.000miles)

When driving high speeds i can feel a little vibration in the steering (like a very little unbalanced wheel), but when start braking it gets very bad, the car shakes hard but stil brakes good.

I tried everything, balancing, aligning, resurfacing 4 discs, etc. I was wonder if there are any bushing, joint or something else that I could forget.

I'll appreciate your comments.

Patrick

chimchimm5

iTrader: (9)

How old are the tires? Possible bad cupping?

ipozestu

iTrader: (18)

That sounds like a warped rotor to me. When you replace them get a set of DBA's or something.

wrex 2.0

if the shaking gets worse when braking it's probably your rotors. re-surfacing them is a tempary fix, but you probably need new rotors because they are warped.

NeRdY DoRkUs

there is no warped rotor do not believe anyone that tells you that you have a warped rotor, its pad deposits that are uneven on the brake rotor. you can look at your rotor and see the orange/brown discoloration of the pad deposits on the shiny rotor. a resurfacing would fix that or you could read stoptechs article on using abrasive pads to resurface rotors.

hawk 9012 pads are heavy race pads. get those do a 3 cycles of 10 hard stops with them without braking to a complete stop and they resurface your rotor for cheap. for more info read stoptechs tech article on it.

phoward

The tires have 20.000km and are in a very good condition (maybe 30.000km more).

I'm using Carbotech Bobcats on all wheels. This pads are very metalic, could it cause the depositing?

ipozestu

iTrader: (18)

Uneven pad deposits on a rotor is a tell tail sign that it is warped. Believe that...

NeRdY DoRkUs

no... its not

read http://www.stoptech.com/tech_info/wp...rakedisk.shtml

ipozestu

iTrader: (18)

Not discrediting stoptech, I have used abrasives on my rotor before to remove glazing and deposits which were obviously uneven. This was because of a vibration both on the brake and at high speeds. After this was complete, I reinstalled the rotors and te vibration/shimmy was still there. I Took the rotor in to have it turned and the vibration and shimmy was gone. See lots of people says things, hell Quirt Crawford think he builds the best engines on earth, are you going to listen to him? As the author from stoptech stated this has been "misunderstood for fourty years." What he says makes sense but rotors can and do warp.