differance in brake proportion valves

Topics that apply to all 92-95 civics
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By suspendedHatch
- Mon May 14, 2012 3:04 am #304828 What do you mean by diagrams? The plumbing is the same.

Cars with rear discs will have more pressure on the back than cars with drums because drums have more clamping force.

If you swap both the front and rear knuckles on your Civic with an Integra, you should also swap the prop valve from a non ABS Integra/Del Sol/Civic that had rear discs. (ABS cars don't have prop valves). Otherwise the rears will easily lock up under heavy braking which is very dangerous particularly in a turn.

If you swap only your drums for discs, you should keep your original prop valve. Lowering the car and increasing the spring rate reduces the amount of weight transfer when braking, so some extra bias to the rear will benefit your stopping distance.

I preferred having Wilwood knob style adjustable prop valves on my first couple of Civics but now I'd rather just have ABS and avoid having to find the brake fitting adapters.
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By familyEGuy23
- Mon May 14, 2012 5:37 am #304834
suspendedHatch wrote:
If you swap only your drums for discs, you should keep your original prop valve. Lowering the car and increasing the spring rate reduces the amount of weight transfer when braking, so some extra bias to the rear will benefit your stopping distance.
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Don't mean to jack your thread OP but this got my attention...
I was planning on only swapping drums for discs,but reading these made me change my mind. I have the 40/40 prop valve, rear disc set up 93 integra. If I get EG6 SiR front brakes or DC2 front brakes I would defintely need a bigger Master cylinder and brake booster off which vehicle specifically?
Reason being I have some new ball joints I plan on installing and might as well use this application on a bigger brake spindles

By EJ1_MK
- Mon May 14, 2012 6:26 am #304836
familyEGuy23 wrote:
suspendedHatch wrote:
If you swap only your drums for discs, you should keep your original prop valve. Lowering the car and increasing the spring rate reduces the amount of weight transfer when braking, so some extra bias to the rear will benefit your stopping distance.
.


Don't mean to jack your thread OP but this got my attention...
I was planning on only swapping drums for discs,but reading these made me change my mind. I have the 40/40 prop valve, rear disc set up 93 integra. If I get EG6 SiR front brakes or DC2 front brakes I would defintely need a bigger Master cylinder and brake booster off which vehicle specifically?
Reason being I have some new ball joints I plan on installing and might as well use this application on a bigger brake spindles


First things first, 40/40 will be fine, the other thing is the factory 13/16 MC on an SI will be fine or an 7/8 MC from a EX coupe will also work with out having to change brake lines etc. Anything larger it is over kill. You can go up to a 1" off the Teg but it made for ABS systems. And remember this 92-00 civic ex, si and all front spindles on the integra's are the same. the rest are the 9" brake setup and stepping it up will be fine with out changing anything besides the Prop valve.

If I remember correctly the size on the MC is on the left side when looking at it. And pretty sure that a 13/16 comes on most hatchbacks, and 7/8 come on the coupe and 4 dr.

Most importantly as stated before drum brakes take more pressure and if rear disc do not, so when (and I have seen this first hand) braking with a prop valve for a drum brake with disk on back it will spin around because the rears will lock. SO in short going to disc you will need to change prop valve, changing MC or booster is not necessary. plus all the boosters are the same anyway besides mounting of the MC.

You can use a 30/30 as well it comes on most 92-95 coupes. I ran this for over a year before I replaced it with a 40/40 there was no difference.
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By familyEGuy23
- Mon May 14, 2012 6:59 am #304839 ^^ thanks for the input :thumb: helped me save $$ I didn't need to spend on
cool I'll be looking for the front spindles I have a 94 lx sedan with the 7/8 MC and 40/40 prop valve think ill be set thanks again :thumb:
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