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Question regarding rear disc conversion/master cylinder

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Old 04-12-2010, 09:24 AM
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Default Question regarding rear disc conversion/master cylinder

I just put integra rear discs on my 96 dx hatch, new rotors, pads, fully bled. I have read numerous times that you don't have to swap out the master cylinder, but I swear I think I need the Si one. My brakes will stop, but the pedal goes almost to the floor before they engage. If I pump the pedal a couple of times they grab a lot better and more towards the top of the pedal stroke. I am missing something here? I was planning on putting on an Si MC when I upgrade the fronts, but maybe I need to do it now? Anyone have any ideas? I'm not leaking fluid anywhere and I've bled and bled the lines until I saw no air bubbles coming out.
Old 04-12-2010, 09:50 AM
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Default Re: Question regarding rear disc conversion/master cylinder

I first did the GSR brakes all around with the cx MC, and the setup was horrible. But not as bad as you described.

Are you monitoring the fluid levels ? If the fluid levels is not moving at all ( no leaks ). Then everything points to the MC. But it shouldnt be as bad as you described.
Old 04-12-2010, 10:34 AM
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Default Re: Question regarding rear disc conversion/master cylinder

Yeah I am checking my fluid level daily and it is at the max level, I see no leaks anywhere and I just have the rears done for now. I still have the stock dx front brakes on. I'm going to have a friend come over and help me bleed these things some more. I guess there could be air in there, but I don't see how. I have already gone through a large bottle of brake fluid already!
Old 04-12-2010, 05:53 PM
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Default Re: Question regarding rear disc conversion/master cylinder

bump
Old 04-12-2010, 06:30 PM
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Default Re: Question regarding rear disc conversion/master cylinder

I think u need a 60/40 prop valve. If ur gonna change the front brake system ur gonna need the si MC anyways. So u could just install it now.

I know many people that changed just the rear brake system and the brakes were great with the stock MC and prop valve. But i also heard of it not going so well.
I would change the prop valve to a 60/40, Then bleed again. That should fix it.
Old 04-12-2010, 06:39 PM
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Default Re: Question regarding rear disc conversion/master cylinder

The only thing is that every thing I have read states that my car and the 99-00 si have the same prop valve.
Old 04-12-2010, 06:49 PM
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Default Re: Question regarding rear disc conversion/master cylinder

Prop valve isn't as important as the MC.

I'm still running the same Prop valve.
Old 04-12-2010, 06:56 PM
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Default Re: Question regarding rear disc conversion/master cylinder

Get the si prop valve, due to the fact he has dx hatch he has the same prop valve as si so he's fine there.
i will be changing mine to si when i do mine, but i will also be doing the fronts.
Old 04-12-2010, 07:12 PM
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Default Re: Question regarding rear disc conversion/master cylinder

I think I may have effed up by trying to bleed the brakes with the car running. What do you think. lol!
Old 04-13-2010, 07:10 PM
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Default Re: Question regarding rear disc conversion/master cylinder

Well I finally fixed the problem! Turns out my pedal height was out of adjustment by over half an inch. Once I got that back to spec, WOW, I now have brakes, and they bite HARD! I am so happy and relieved that it was something simple. for me.
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