brake problems

[malloynx]

for the past week, my brakes feel like there getting worse. i have been pretty hard on the car and now the brakes are starting to suffer.

whenever i do high-speed braking; the brake pedal will pulsate when i appiled the brakes. i won't get the shimmy from the steering wheel. when i'm doing normal driving in traffic; the brakes feel fine.

i bought some ate super blue racing fluid awhile back. i have installed it yet. do you think that stuff will help?

right now i'm running that crappy 2.99$ prestone stuff.. could i have cooked that fluid?

 

[Supra Blues]

The new fluid will most likely not help.

My bet is that either the rotors are warped or hot spotted.

 

[americanjebus]

yea man you toasted them. i warped all four from high speed braking (about 115 -30mph in less than 1/8mile) fluid doesnt do anything cept have air bubbles so it wont change anything. might want to rethink the way you brake at high speeds the way i did, dont hit the brakes at 100+ just let it coast till about 70 and tap off and on to avoid warping.
are you gettin a sqeel cus it could also be your pads digging into your rotors like mine did. if they are gone get some slotted ones while your at it.
i dunno how you could "cook" brake fluid cus its just a pressure line.
i'd hit midas and have them measure how bad they are.
my 2cents
-luis

 

[malloynx]

yea, i really don't know. the rear brakes have brembo slotted rotors with less than a 1000 miles on them. the front rotors are stock. i have goodridge brake lines all around.

te brakes are fine when i'm doing 70mph and under. no squeaks and they stop fine. it just the highspeed braking that is sucking

 

[supra90turbo]

yeah. you hotspotted the rotors.
take off a wheel and look at them.
you'll see blue/purple/yellow spots continuously going around the rotor.

i did it too. just buy some pads/rotors and be done with 'er

 

[aye mate]

My front were warped and I bought a set of Brembo cross drilleds off Ebay for like 260 for all 4 corners. Working awesome for about 5 months.

 

[p5150]

I would pump out all that old brake fluid for some new stuff. Having two people to help you (one to pour, one to pump) will help a lot.

 

[IJ.]

Malloy: I don't know if it's the case here but over the years mine did the same with the stock rotors, I'd have them skimmed true and after some high speed work back to crapola!

The only thing I found that worked was to use a torque wrench on the Lugs (The tire store thinks I'm insane as I won't let them use a rattle gun)

I pull mine down to 75 ft/lbs and stopped having the pogopedal!
(Since the Mk4 conversion no problems at all as they're quite a bit thicker)

I also bought a single person bleeding pump (Lisle) and have never had a better pedal!