ok...at high speed braking, this is hard braking from about 110 mph and up....the brakes seem to shudder, or make a slight to hard throbbing when i apply the brakes pretty hard...what do ya think the culprit would be...pads look good....is it the rotors

 

Warped rotors if the pads are good.

 

warped rotors....

 

Most likely warped rotors

 

damn...so i'm gonna need to get new rotors now i guess ..oh wellz ,...thanks

 

so will this require new rotors, or can i just get them turned

 

you can certainly try if this is the first time...

 

Try using a torque wrench and properly tightening the lug nuts to about 85 ft/lb.
Should help some, hopefully.

 

Take the rotors off and take them to Autozone. 9.99/rotor to machine them (at least here). If they are under spec just buy some autozone rotors, should be $24.99 each.

 

I would rather just buy some autozone rotors.

 

i'm scared to buy anything from autozone anymore....i'll see if i can get them turned ..or get some brembro blanks thanks guys for da help

 

Enjoy wasting your cash

Autozone rotors x 2000 I used to support brembo blanks and still do over anything else.. except autozone rotors.

 

so autozone rotors are pretty good then....

 

Tip #1:

Don't wash your car if the brakes are still hot. This can cause rapid cooling of the rotor surface and cause warping

PB - who rarely washes his car

 

Most everyone I know uses them now.. track and street.

 

AutoZone
Washing Car

 

Well you should get throbbing A LOT if you have warped rotors. You should have throbbing daily driving too... I got throbbing under High speed braking on the track, but i KNOW my rotors can't be warped. So, it COULD be your ABS kicking in.

 

no its not the ABS ...its only when at high speed...when i step into the brake hard, othercwise ate low speed its normal

 

My ShitSlots did the same thing.. shake at higher speeds but not lower.. and the rotors were warped.. of course they were warped new cause they ******* suck.. but still

 

Cast iron rotors swell a bit when then get hot (thermal expansion) - thus you can feel more vibration. Also if the rim is slightly out of balance - this will be accentuated at higher speed.

 

i had the EXACT same thing= warped rotors

 

My car used to hop under aggressive braking. It was ******* awful. I fixed it by fixing all the busted bushings that I could find. I probably have a few more bushings that could stand to be replaced, but the swaybar ones and the endlink ones seem to have made the biggest difference.

Also, squeeze the brake, don't stomp. This made a huge difference in mine.

Warren

 

could also be pad deposits on the rotor.

 

What kind of pads are you running?

 

it did this w/ the P+ on stock rotors.
also did this w/ axxis on stoptech kit.

I was told this commonly occurs after keeping the foot on the brake after getting the brakes pretty hot.


yshi - who cured both instances by taking the car to the track