Brakes shaking over 80mph WTF?

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gimpo2

Member

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Protege5

• Apr 25, 2004

• #1

Ok since i got my hiboost in i've been able to hit higher speeds way faster, now i noticed that when i hit the brakes goin fast than 80mph or so there's my car shudders pretty badly... never used to do it before, i think it only does it after my brakes are nice and heated up. i think my rotors are warped... can you guys think it could be anything else?

 

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mp5jeff

Member

• Apr 25, 2004

• #2

no, your rotors are warped...

 

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gimpo2

Member

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Protege5

• Apr 25, 2004

• #3

ah dammit i wonder how that happened... i guess its time for that big brake kit , or i could just get my rotors shaved

 

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mp5jeff

Member

• Apr 25, 2004

• #4

probably from slowing down alot from high speeds, i know you are boosted so i think we can agree you've been up pretty fast/slowed down fast alot.

 

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Pretzellogic

Member

Contributor

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Das Pretzelwagon

• Apr 25, 2004

• #5

Bummer, man.

At least you now have an excuse for an upgrade. Go slotted.

 

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SHAGwagn

Member

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'07 Mazdaspeed 3 GT

• Apr 25, 2004

• #6

same scenario, same problem!

 

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gimpo2

Member

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Protege5

• Apr 25, 2004

• #7

It looks like we both need new rotors

 

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MAZDAKINDAGUY03

Member

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2003 protege es

• Apr 25, 2004

• #8

it could be that all the lugs on your wheels are not at the same torque rating...if you have your tires rotated and balanced at a shop i would make sure they torque each nut the exact same. this happened to me on my probe and i went trough a few sets (including the drilled rotors) befor i found out wy it was happening....all i did was put a new set on and torqued them down myself and i never had the problem again...just my .02

 

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SuperWagon502

Member

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02 Mazda P5 / 03VW GTI 1.8t

• Apr 25, 2004

• #9

No turbo here but my Rotors are warped now. Too much highway chasing and then slamming up on traffic in Atlanta i guess.

 

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ChuEy826

Member

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Mazda Protege' 5 - 2003.5 - Silver - Auto

• Apr 25, 2004

• #10

mMmmMm... big brakes kit.. that would look great on your car SHAGwagon... rims + big brake kit = sex for the eyes.

 

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SHAGwagn

Member

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'07 Mazdaspeed 3 GT

• Apr 25, 2004

• #11

i know i know...want to lend me some money?>

 

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grindMARC

Member

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09 TDI | 13 Focus ST

• Apr 26, 2004

• #12

According to some very detailed and reliable information over at http://www.stoptech.com/whitepapers/warped_rotors_myth.htm, there is no such thing as brake rotor warp. Its likely just deposits from your brake pads. The deposits usually happen from braking REALLY hard and leaving your foot on the brakes after you've come to a complete stop.

The easiest thing to do is to reseat your current pads. Instrux from the above stoptech link:

The procedure is several stops of increasing severity with a brief cooling period between them. After the last stop, the system should be allowed to cool to ambient temperature. Typically, a series of ten increasingly hard stops from 60mph to 5 mph with normal acceleration in between should get the job done for a high performance street pad. During pad or disc break-in, do not come to a complete stop, so plan where and when you do this procedure with care and concern for yourself and the safety of others. If you come to a complete stop before the break-in process is completed there is the chance for non-uniform pad material transfer or pad imprinting to take place and the results will be what the whole process is trying to avoid. Game over.

Click to expand...

If the deposits are really bad, you can remove the rotors and clean them with a special (non metalic?) sand paper.

Rotor warp is an urban legend.

 

Last edited: Apr 26, 2004

E

enzo ferrari

Member

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Mazda Protege MP3

• Apr 29, 2004

• #13

Other than the feel of the breaks how can you tell they are warped. Any way to do it visually.

 

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SpicyMchaggis

Banned

Contributor

• Apr 29, 2004

• #14

i have it real bad. its a combination of needing 4-wheel alignment and uneven brake pads.

 

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gimpo2

Member

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Protege5

• Apr 30, 2004

• #15

enzo ferrari said:

Other than the feel of the breaks how can you tell they are warped. Any way to do it visually.

Click to expand...

look for discoloration of your rotors

 

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Poseur

Member

Contributor

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03.5 Lsr Blue P5

• Apr 30, 2004

• #16

Ibeg to differ on the rotors are never relaly warped bit 'cause I've been in the shop while mine were being cut. you watch the lathe-like machine, and one part of the rotor, no scrape, another part, it's cutting hard enought that you hear the machine bog. OF course this one was after a VERY blatany hot stop inmy old Civic when a stop sign and a T in the road jumped out in front of me at 110mph. the things were warped warped for sure.