ok here it goes, i have a 99 honda civic ex. i know it has same front rotors as an integra, in the rear drums, so i swap disk brakes on the rear from a 97 acura integra, whole arms and e-cables, worked fine, stock master cylinder and prop valve. so 4-5 months later, i keapt hearing a squeak from the rear, need new brake pads, rotors. im changing em and i notice that my rear calipers are ****ed up. the boots on the pistons are worned out. so i had xtra set from my 90 acura integra swaped em in. now everything fitted right, i go to bleed em and it wont work, pedals keeps goin all the way in, i can barvely brake. so i wuz like **** it, im tired deal with it tomorrow. so im thinking its my brake master cylinder changed it and i swaped front integra calipers since they r bigger and i had em laying around. i started bleeding all corners, from rear left, front right, rear right, front left, and nothing still the same. so im wordeing if maybe my master cylinder is out or my rear calipers are ****ed up too. but im hoping for some answer and some help plz.


edit, for those who knows, wuts an 1in bore master cylinder, that will fit my civic, without modifications. could i get a 98 integra master cylinder even if its with abs?

 

This should help. This is directly from the "Putting X brakes on 96-00 Civics" in the 92-00 Civic FAQs. Pay attention to line 3 as it applies to you cause you have not only Integra calipers (which needs more fluid) and the rear calipers (which requires more fluid as well) As you'll read, your stock MC is way too samll for what your have. Thats why your pedal goes down and doesnt seem to stop the car: alot of area, not enough fluid. I highlighted the answers to your questions hope this helps. This also applies to rear disc conversions, as the rear calipers push way more fluid than those wheel cylinders.

Also in the fact he (BrakeExpert) states that he recommends using the SI prop valve but he also states he put rear discs on his 96 LX sedan and hasnt had issues. Get that 1" MC from the 98-up GSR/TypeR!

Master Cylinder relative to the Caliper
When you go to bigger caliper than use a larger piston, you are pushing more fluid through the brake lines. Therefore, you should want a larger master cylinder to push this more fluid.

"1) General rule is…with your stock Civic DX, with the stock front calipers, keep your 13/16” MC. Any bigger and your pedal will be too stiff.
2)With EX/Si calipers, use a 7/8” MC from a 96-00 EX or 99-00 Si because of the more fluid going to a larger piston.
3)With ITR/Legend/Vigor/Accord V6 or Integra DA or DC calipers, use a 15/16” MC from a 98-01 Integra LS to accommodate for the even more fluid. Any smaller of a MC will cause the pedal swing to be too long.With NSX or Legend GS calipers that have two pistons, or an aftermarket caliper with multiple pistons, you’ll want a 1” MC because of even more fluid required to push all the pistons. Get the 1” MC from a 98-01 Integra GSR or ITR MC as it bolts onto the EK brake booster"

 

And also just to let you know, in the Brake FAQs the proper bleed sequence is right rear, left front, left rear right front.

On our cars its not closest to furthest. Doing so causes cross contamination (introducing air into the other line circuit)

 

ok thx a lot of i need to get a bigger mc, also i did bleed the calipears that way, i just mistaked wut side i wuz typing

 

cool. Now get that MC and enjoy your brakes!