I did a rear disc brake conversion. I mean it brakes fine with 20/40?? well I dont know the numbers for a stock 97 civic hatch cx but I was wondering should I replace the proportioning valve from an ex or something with 30/40 or 40/40?? does it feel better? anyone did this before?

 

usually they recomend the 40/40
im in the proces of doing the swap right now on my 99ex.

 

hrmm interesting.. tell me how it goes and how much of a difference in braking is afterwards.

 

I have a 4040, integra RS rear discs on my 97 ex.

I can't really say how much the valve helped, because I went from stock brakes and drums to the 4040 valve, slotted front rotors, sport pads, and the discs all at the same time.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raidacaipo &raquo;</TD></TR><TR><TD CLASS="quote">I did a rear disc brake conversion. I mean it brakes fine with 20/40?? well I dont know the numbers for a stock 97 civic hatch cx but I was wondering should I replace the proportioning valve from an ex or something with 30/40 or 40/40?? does it feel better? anyone did this before?</TD></TR></TABLE>

all 96-00 civic Si/Cx/Dx models came with 40/40 prop vavles...

 

^^^ He's right, I checked the part numbers for the prop valves on hondapartscheap.com and they are the same. You should already have a 4040 prop valve.

I have a 99 Civic EX and I did the rear brake swap. The prop valve I pulled out of my car was 4030. The one from the 99-00 Civic Si is a 4040. That's the one I swapped in. There is a difference in the amount of brake fluid that travels to the rear of the car. With drums, you need more fluid in the back so the pistons can move the shoes. You don't need as much brake fluid with disc brakes. When you have disc, it is a good idea to swap to a 4040 prop valve so that braking is more evenly distributed. If you have a a 4030 valve with this setup, the rears will have more clamping power than the front.


Modified by B18CivicEJ8 at 4:45 PM 6/26/2008

 

I just did 40/40 in my eg with rear disc swap. I drove the car for a year then did the 7/8 booster and 40/40. It was an amazing difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bmoua &raquo;</TD></TR><TR><TD CLASS="quote">

all 96-00 civic Si/Cx/Dx models came with 40/40 prop vavles...</TD></TR></TABLE>
really? are u sure? I got rear disc brakes with slotted/drilled rotors and better brake pads and it still doesnt brake as good as my girlfriends stock 98 ex..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raidacaipo &raquo;</TD></TR><TR><TD CLASS="quote">
really? are u sure? I got rear disc brakes with slotted/drilled rotors and better brake pads and it still doesnt brake as good as my girlfriends stock 98 ex.. </TD></TR></TABLE>

that becuz your cx comes with smaller front rotors and calipers than the 96-00 ex.

 

so Im good with the proportioning valve then? maybe I should just upgrade my front brakes to si or integra??

 

According to this:

https://honda-tech.com/zerothread?id=1513752

you're good. 99-00 Si front brakes are the same as 88-00 ex and 90-01 Integras (not incl Type-R). 10.3" rotors. I'm not sure what size a CX would have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raidacaipo &raquo;</TD></TR><TR><TD CLASS="quote">so Im good with the proportioning valve then? maybe I should just upgrade my front brakes to si or integra??</TD></TR></TABLE>

keep in mind if you upgrade the front brakes i'd recommend upgrading the brake master cylinder and booster as well.

 

Yes upgrade your fronts aswell...You will need to get the complete knuckle with the caliper. I personally suggest looking for 94-95 Civic Ex with ABS or 94-01 Integra. These have the largest pad surface. I would also do a brake line kit like Russell.