what brake master and booster for 4x114.3

[EJ1Rider]

ok speedo just told me that im going to need the brake master cylinder and or booster? from an integra...anyone know what year or model integra? and if i just need the master or both that and the booster?????

k thnx
Bill (^_^) V

[Volume 8]

Depends on what you want to do, there's several options:

Without changing the booster:
-15/16th from a 88 prelude Si
-15/16th from a 91 Civic EX sedan

If you change the booster to an integra unit it opens a lot more options, since there's more 15/16th MC out there form those cars. There's also the option of using a 1" but I forget which model it comes on.

I have an integra 15/16th master cylinder if ya need one also.

[Speedy]

itr has 1"..bill you just saw me lol you shouldve asked

[EJ1Rider]

Depends on what you want to do, there's several options:

Without changing the booster:
-15/16th from a 88 prelude Si
-15/16th from a 91 Civic EX sedan

If you change the booster to an integra unit it opens a lot more options, since there's more 15/16th MC out there form those cars. There's also the option of using a 1" but I forget which model it comes on.

I have an integra 15/16th master cylinder if ya need one also.

what size is the oem spec on the EJ1? and how can i use the MC from prelude or civic sedan you listed above without changing my booster? what about the 15/16th integra one??

i just need to find the best route to go.... i just got the 4040 prop valve today and will prolly just go with integra booster and mc, what mc do you have... abs or non abs??

[Volume 8]

The difference in boosters is the way the master cylinder bolts up, there's 3 different bolt patterns. If you look at a civic and integra side by side you'll see what I mean.

[EJ1Rider]

so do i need the 1"? iv been finding alot of 98 spec ITR ones but the MC looks differ from the 96 spec one i saw and then i just found a JDM EG6 Honda Civic 15/16" Brake Master Cylinder

Its the booster and MC, would that work???

15/16th or 1"?? i dont want the brake pedal to feel to soft

[Speedy]

you only need the boosted if the bolt pattern on the mc is different. im running the cx mc and 30/30, pedal doesnt feel bad

[EJ1Rider]

ok so should i just get the 15/16th? civic or prelude MC???
i have the 4040 pv

[Volume 8]

what size is the oem spec on the EJ1? and how can i use the MC from prelude or civic sedan you listed above without changing my booster? what about the 15/16th integra one??

i just need to find the best route to go.... i just got the 4040 prop valve today and will prolly just go with integra booster and mc, what mc do you have... abs or non abs??

I missed a couple things in this post but...

The original MC in an EJ1 is 7/8, a DX is 13/16. The 88 Prelude and 91 Civic EX MCs will work because they share the same bolt pattern and the lines are in pretty much the same place. I have a non-abs 15/16 from an 88 Prelude in my car and it bolted right up. I still have drums out back and the stock proportioning valve but the pedal feels great.

You'll probably want to go with the 1" if you want a really stiff pedal, especially with 4 wheel discs. In that case, you'll need to find a 98 Integra RS non-abs master cylinder.(someone correct me if I'm wrong.) And the corresponding booster.


Here's a few pics to show the difference.

98 Integra RS, non-abs


94 Integra RS


95 Civic EX


88 Prelude Si


91 Civic EX sedan


As you can see in the pics, the orientation of the mounting tabs and the placement of the hydraulic fittings are the main differences. Also notice that the bottom 3 are nearly identical externally which is why they bolt up to the stock civic power booster.

[Speedy]

so for me and bill, our best bet is the 91 ef ex w/ a da prop valve

[Volume 8]

so for me and bill, our best bet is the 91 ef ex w/ a da prop valve

Pretty much. I only used the Prelude MC because I found it in a junkyard first, then used it as a core toward a new one.

[EJ1Rider]

so for me and bill, our best bet is the 91 ef ex w/ a da prop valve

how is the 91 ef the best bet for both of us?
i have the bigger ITR brakes and rear disc....as far as i know, you dont...unless ur not telling me something???

im prolly just going to go with the 1" btw

[Speedy]

i have 99 si in the front/00 ls in the rear