brake question...

[EclipseGST-95]

after braking hard maybe 3 times within a half our...maybe some normal driving...then a hard 40 mph stop and then a hard 50 mph stop then a hard 80 mph stop...has anyones wheels got reallly hot...the inner part of my rims u couldnt touch for more then a second they were burrning...the last hard stop at 80 it seemed really weird...like i was pushin in a cushion i almost didnt think i was gonna stop...after that i tired a quick stop to see if the brakes were still working n they were find but at the 80 mph stop u smell burning i guess it was the rotors burning then pads..i dunno...but is it normal for ur brakes to make ur rims burn after hard braking? i think they may be warped im not sure tho?

 

[Defiant]

Welcome to brake fade.

Warped rotors won't affect fade. They'll pulse your pedal, but not much affect braking power.

 

[EclipseGST-95]

thats kinda broad can you be more specific and give me a little more insite on that please thanks

 

[Defiant]

Christ, Beavis. The damned car's a ton-and-a-half. Brakes work by converting kinetic energy to heat. The heat's drawn from the rotors and pads to the wheels, bearing grease, bearings, calipers and fluid. The fluid expands as it gets hot. Do it enough times, and you'll boil the fluid and have _no_ braking power.

Street brakes are good for one or two hard stops from 60. That's not slowing for a corner coming down a mountain, that's edge-of-ABS full-pedal crimped-on-full-strength to a complete stop. After that, they need a nice long rest, and possibly new pads. Usually, you figure out after the first stop that you don't need to do that again. Ever.

Try feeling your wheels after just a normal run across town, dealing with a few stoplights. They're hot enough to be uncomfortable to touch.

Overheating brakes won't usually warp them.

 

[EclipseGST-95]

k thanks dude

 

[PaulPDX]

They'll warp if you wash your car while the brakes are still hot. Fast hot to cold transition will tend to warp metals. So if you go for a drive and decide to wash your car right afterwards, don't spray water directly at the brakes... even if the steam looks cool.

 

[EclipseGST-95]

oh yea i knew that i think i have done it once by mistake but it was after a regular drive with normal stops sprayed the brakes but it was minimal steam...i dunno i guess ill just go easy on the brakes from now on...

 

[PaulPDX]

As Defiant has already mentioned... even on a regular drive the brakes can still get very hot.

Think. Metal rubbing on metal at high speed.

Energy just doesn't disappear. It has to go somewhere or take a different form. Basic jr. high / high school physics.

 

[EclipseGST-95]

i havnt had physics yet next year