so i canged both of my rear calipers, the first took the whole day because i was trying to alignthe hole in the brake like with the hole in the bolt that holds down the line, only to realize that it works anyway..? right?

so the next day i did the other one in about 20 min, then using speed bleeders blead all 4 calipers. and now my pedal feels even worse than before. it feels very spongy at the top but my brakes seem to work well when pressed all the way down, but not before a good amount of pressure. the pedal itself has very little pressure especially at the top, why could this be and what do i do?

 

You didn't totally bottom-out the master cylinder (i.e. bring the brake pedal to the floor), right? I think that damages the master cylinder's seals...

 

you have to...
A)Bleed them in order (they tell you which order in the chilton's/Haynes/Bentley guides)
B)Make sure all the bleeder screws are closed in the order from which you bled them(reverse) by pumping the pedal with a helper and with a bleeder screw open to get the air out. this takes a while

 

If you change the rear calipers or pads you need to excercise the handbrake 15 - 20 times to adjust (tighten) the rear brakes. The reason you feel slack at the top of the pedal travel is that the rear pads aren't close enough to the rotors. After you take up the slack they work normally.

 

Bleed them again the old fashioned way, use a friend or wife to pump the brakes while you open and close the bleeder screw. Bleed in the following order: right rear-left front-left rear-right front. DOn't be afraid to use a lot of fluid.

 

I had to bleed mine twice. I let the fluid in the reservoir get too low and air got into one of the lines! I didn't realize this and thought I had broken a line or something when I put the SS ones on. But after I bled the second time, everything works great.

 

try to bleed them again. If it doesn't work, bring it to a mechanic. Don't go driving around if your not confident in your brakes!!