importimage

I have a 93 civic hatch and my brake booster is pooched. Would you recomment that I just use a replacement one for the same model car or is it beneficial to use an integra one?

Also, I have had a erratic idle for some time and it appears that when I pump the brakes the idle moves up. Is this common that the idle fluctuates with a faulty brake booster?

Mike_C

how do you know your brake booster is bad?

simple test:
1. with the car off, pump the brakes til they firm up and hold.
2. start the car, if the pedal loses pressure then your brake booster is more than likely fine.

if you're still not convinced you can unbolt your MC to see if there is any fluid in the booster.

importimage

Well, I depress the pedal slowly 5 times and supposedly it is meant to get firm and if it doesn;t this is a sign it is faulty. Also, I had my friend put it head near the booster to listen for vac leak and sure enough we can hear one. Finally, I started the car, let it idle for a minute or two, depressed the brake, turned off the car, waited for 30 seconds and if the booster is good, the pedal will stay where it is and if it is faulty the pedal will travel more to the floor...mine travelled more to the floor.

Let me know what you think please.

importimage

Anyone care to help me.

From what I understand, I should get a 94-96 civic brake booster and master cylinder and 40/40 prop valve from 91+ SI/EX.

importimage

Can anyone confirm this please

elwood

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importimage &raquo;</TD></TR><TR><TD CLASS="quote">Anyone care to help me.

From what I understand, I should get a 94-96 civic brake booster and master cylinder and 40/40 prop valve from 91+ SI/EX.</TD></TR></TABLE>

I am not sure about the proportoning valve,

but

I dont know why you would even think 94-96 bb and mc.
It crosses two generations, and wont be the same.

You would want to get a 15/16th non-abs mc and what ever
booster that goes with it (model specific). Bending lines usually
isnt too big of a factor. I used a CTR mc and booster in my 92cx.
Had to tweak the lines a bit with my hands, but it was very easy.

importimage

I suppose it is worth the extra few bucks to just get the bb and mc brand new. Hell, I will just buy one of each model then take back the ones I don't use. I suppose I know which one will work because either it will fit or not.

What do you think?

elwood

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importimage &raquo;</TD></TR><TR><TD CLASS="quote">
What do you think?</TD></TR></TABLE>

Im not really sure what your asking?
Can some one translate the karnedien for me?

I would try to find a local jdm importer and
see what they have first. Or look in the classifieds
here on honda-tech. They are pretty spendy new,
and if you wait long enough you may be able to get
a used 1" mc and booster for the price of a new 15/16ths.

If it fits it fits, if thats what you were asking.

It all depends on how much work you want to do. To me
spending 10min bending one line up a bit is worth it to be
able to use my free 1" mc and booster. I would have even
flared the line. Its easy with the right tool. I just gave my dads
friend a 15/16ths mc for his triumph(sp). He dosnt have room
in his engine bay for a booster, so hes running a hydrolic system
with his stock mc to the mc and booster I gave him that hes mounting
in the trunk. You can make anything work, its just how much time and
how creative are you?

importimage

Ok, honestly, I just want my brakes to be tighter. I have slotted rotors all the way around, stainless steel brake lines, and integra front and rear discs. My car is a 93 civic harch. It appears a lot of people swap in a 40/40 prop valve so I will do this (supposedly a 94+ teg RS one works). I am pretty sure my bb is faulty so I need to change it, so if I upgrade to a integra bb, do I have to change the mc as well or should I just swap in the same oem bb. If I do just replace this brake booster, will it just fault again?

elwood

Well, im pretty sure abs wasnt an option in 93,
and even if it was, its a safe bet to say you dont
have it, so you have the 13/16ths master cylinder. (CORRECT ME IF IM WRONG)

If you want better petal feel, upgrading to a 40-40 prop
valve wont do anything for that. It just determines
how much brake fluid goes where. Your pedal feal is all
in the master cylinder.

I had the ctr 1" on gsr front brakes and rear drums, felt amazing.

So in my oppinion if your going to be replacing the booster,
you minght as well get a new master cylinder, since its already
off. And this will get you the better petal pressure your looking
for. Make sure you infact have the 13/16ths and not the 15/16ths.
Its stamped on the side of the master cylinder, below the resivior,
and about the middle of it.

Mike_C

I'm confused now. Is your brake booster busted or not? Do you just want a better pedal feel?

importimage

Mine is stamped 13/16. I am almost positive my bb is faulty because when I perform the airtightness checks, it fails. So, what should I swap in to have no problems. Will in fact the 94+ TEG mc and bb bolt right in? Everyhting I have read on this people are confused. You both seem to know. Thanks

Nextelbuddy

if your brake booster was bad then your brakes would STAY tight.... if your brake pedal goes to the floor with car on or off its got to be your m/c.

Mike_C

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importimage &raquo;</TD></TR><TR><TD CLASS="quote">Will in fact the 94+ TEG mc and bb bolt right in?</TD></TR></TABLE>

Yes, just don't get an ABS setup or you'll have to reflare lines. A foolproof idea is to get a '91 Civic EX MC/BB setup.

importimage

I am going to pull the brake booster and get it checked out. If I were to use the same oem brake booster, can I upgrade the master cylinder or do the two have to go hand in hand?

pdiggitydogg

its wise to do both at the same time, and also a good idea to go w/ the larger one
(but I have an ex/si one for cheap - both mc and bb)

importimage

IM sent

elwood

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by importimage &raquo;</TD></TR><TR><TD CLASS="quote">can I upgrade the master cylinder or do the two have to go hand in hand?</TD></TR></TABLE>

It all depends. Some master cylinders have different bolt
patterns, and some boosters have different bolt patterns
on the engine side, but the interior side the 4 bolt patter
is always the same, and can be fliped around if needed.
Wish I had my camera back, I would take some pictures
of it. If you really dont get it maybe ill draw something up.

But you could go 92-95 civic mc and booster, mixing
and matching those. It will fit, but I think that the booster
was specifically matched to that size master cylinder. So
yes, in my oppinion they do go hand in hand.(for the most part)

importimage

I think I will start by getting the brake booster checked and just rebuilt if in fact this is the problem.

As for a larger (proper application) bb, mc, and pv who has this stuff for sale on here?

elwood

I usually do, but have sold out of all my brake stuff.

But I always recomend going through passwordjdm.com

Grate service, email them and see what they have. Tell
them you need something non-abs, and see what they
have. You can PM me if you find out what they have
with your fitment questions.

importimage

Ok, so I had my booster checked and it is ok, but it is the seal between the mc and booster that is likely the problem. I am just wondering if a new mc comes with the seal that I mention. Also, I read somewhere on here that a 91 civic ex mc bolts right up and it a 15/16. Do you think that the oem booster that I am using can handle this upgraded mc? From what I read on here, it is worth while. Anyone care to comment please?

importimage

Well, it appears that the seal is bad between the booster and mc. I called the dealer and they don't sell just the seal. Any suggestions.