jakfrost84

I am going to be swapping my rear drums on my 1992 civic hatch dx for rear disc of and 98 integra. I have read that I need a new prop valve, Master cylinder and a brake booster from a 92 civic hatch si. When I look up the part numbers the Prop valve and master cylinder are the same...So do I only need the brake booster? also what e-brake cable will I need? Any thing else I missed that I should know about would be great. i have searched all morning but haven't really got direct answers. I'm ok doing the swap, just more or less need a parts list. Thank you

superbean

I always thought all you needed was the higher pressure prop valve for discs in place of drums. Master cyl and booster should be the same, if not it prob wouldn't make a difference at all in performance.

SoCal EJ1

Look for a 40/40 or 30/40 prop valve, and don't forget parking brake cables. And of course lines and fluid in the least.

iliv2xlr8

You can use a 40/40 Prop valve from any 94-01 non-abs Integra, typically RS or non-abs EG. The Integra ones are usually easier to find. You do not need to upgrade the master cylinder or booster if you are only doing the rears. If you decide to upgrade the fronts with Integra, I would recommend a master cylinder upgrade. You will need to use the brake cables from a 94-01 Integra, they bolt right up.

For a master & booster upgrade use a 94-01 ABS setup. They are the largest at 1" bore. They do require some line bending, but not too hard. You can also use a JDM ITR setup. Because the ports are on the opposite side, it makes the line bending very minimal. I did this, it's very straight forward. If you want to upgrade the master cylinder without the booster then you can use a 91 Civic Ex sedan master. It is a 15/16" bore and it is a direct bolt-up with no line bending.

Allurian

You dont need a 4040 prop valve. 92-95 si civics(came with rear disks) come with 3030 prop valves which came with all 92-95 Civics. A 4040 prop valve is a waste of money and doesnt have a functional purpose unless you increase the size of your front brakes. All you need is the disc brake assembly and ebrake cables from either an 94-01 integra or any civic w/ disc brakes for rear brakes.

94EG8

Not true. '92 - '95 Si hatches (except the rare '94 Si ABS) used a 3040 prop valve. I personally pulled one 2 weekends ago to replace it with a 4040 prop valve doing an integra front brake swap. The master cylinder and brake booster however are both the same as what you have now.

Break down of what car came with what master cylinder, prop valve and brakes:

CX/DX/VX/LX(non abs):
13/16MC
3030 prop valve
small front brakes, rear drums

Si hatchback (except '94 ABS model)
13/16MC
3040 prop valve
small front brakes, rear discs

EX coupe (non abs models)
7/8MC
3030 prop valve
large front brakes, rear drums

JDM SiR-S hatchback (i'm throwing this in here because I personally had the chance to examine a real one to check some numbers):
7/8MC
3030 prop valve
large front brakes (EX style), rear discs
this one is interesting because it shows that 3030 prop valves were in fact used with rear discs in some cases.

'94 - '01 Integra (non abs, non type R models)
15/16MC (uses a different brake booster that everything else listed, mounting flange is flipped 180 degrees, MC resorvoir is also larger than everything else listed)
4040 prop valve
large front brakes (rotors the same as an EX, caliper pistons are supposed to be larger that EX calipers but I can't confirm), rear discs

Everything I have listed here I've personally seen with my own 2 eyes. Si prop valves have different part number than other civics btw (I had at some point in time stated on H-T that they were the same after calling honda and having the cross reference part numbers they told me they were the same, I've since checked myself and the part number is in fact different)

jakfrost84

Well i got a prop valve any way About the master cylinder and brake bookster ill have to invest in later but i should get one for and integra with abs?......... Now If i get rear disc from an integra with abs is this going to change anything i need to do. I do want to upgrade the rotors, do I just needto buy rotors for a 94-01 integra with abs?

94EG8

Theres no point in swapping the booster and master cylinder if you are only swapping the rear brakes (if look at the list I posted in my last post you will notice that the Si and the DX both use the same Master cylinder and brake booster) Integra rear disc brakes are identical to '88 - '00 civic rear disc brakes.

No, the rear discs are the same regardless, you wont be able to use the MC from the ABS 'teg though, it uses 1 different 12mm fitting, and you can't use the prop valve (ABS models don't have one, everything is done through the ABS box)

Just as an aside, the rear discs by themselves make virtually no difference in braking distance, its the integra front brakes the make the difference.

jakfrost84

more for looks but thanks a lot for your help.

iliv2xlr8

I would recommend the 4 wheel Integra Discs. I installed them with a fresh set of rotors, stainless lines, and Hawk HPS pads. I used a JDM ITR master cylinder and booster as well.

My 93 hatch stops on a DIME!!!

If you plan on making any sort of power, it is well worth the investment.

jakfrost84

The steel braided lines do I buy for an Integra or an eg?