1990 civic si : Rear drum to disc conversion

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Old Nov 9, 2006 | 08:47 AM
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Default 1990 civic si : Rear drum to disc conversion

I need a website on how to do a rear disc conversion. I searched and found nada.
Also, I wanna get SS brake lines, which ones do I order ??

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Old Nov 9, 2006 | 09:16 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

search the faq.
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Old Nov 9, 2006 | 10:03 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

Wow, you suck at searching.

https://honda-tech.com/zerothread/1508680


https://honda-tech.com/zerothread/642479
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Old Nov 9, 2006 | 10:43 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (EL Vap133)

Awesome. thanks.
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Old Nov 9, 2006 | 10:58 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

can someone make me a list of all parts I need for this ? I wanna order everything new OEM.

thanks
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Old Nov 9, 2006 | 11:01 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rob. &raquo;</TD></TR><TR><TD CLASS="quote">can someone make me a list of all parts I need for this ? I wanna order everything new OEM.

thanks</TD></TR></TABLE> man people get pretty lazy.
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Old Nov 9, 2006 | 11:02 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

When I did mine I got the rear disk brakes with the trailing arms and e-brake cables from a DA integra.

I also bought the 4040 prop from the same integra.

Later on I added a 15/16 MC from a Prelude.
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Old Nov 9, 2006 | 11:22 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (EJ1 wilcox)

Side by side of the drums and disks.



No more drums! Excuse the stock shocks, they have since been upgraded.



Disks all bolted up.



Integra ebrake cables bolted up and ready to go.

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Old Nov 9, 2006 | 11:27 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (EJ1 wilcox)

^^


about to a whole brake change...still putting everything together

BTW when you guys do the rear brake swap you will need a 40/40 prop valve usually of a DA.

any info on prop valve? anyone know how hard it is? do you have to bend any lines???
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Old Nov 9, 2006 | 12:22 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (ozrednsx)

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


about to a whole brake change...still putting everything together

BTW when you guys do the rear brake swap you will need a 40/40 prop valve usually of a DA.

any info on prop valve? anyone know how hard it is? do you have to bend any lines??? </TD></TR></TABLE>

It just bolts right up. The only thing that sucked was getting to the lines to loosen them up. You MUST use a flare nut wrench or you WILL strip them!

But luckily you don't need to bend any lines or anything, the DA prop valve is a direct replacement
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Old Nov 9, 2006 | 01:26 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (EJ1 wilcox)

Awesome.
Are the DA Rear discs bigger/better than the Crx Si ?
When getting pads, what do you get ?



oh and when I get Stainless steel lines, which ones do I Order ?
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Old Nov 9, 2006 | 02:42 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (Rob.)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rob. &raquo;</TD></TR><TR><TD CLASS="quote">Awesome.
Are the DA Rear discs bigger/better than the Crx Si ?
When getting pads, what do you get ?



oh and when I get Stainless steel lines, which ones do I Order ?</TD></TR></TABLE>

No, all rear disc brakes (CRX, Civic, Teg) from 88-00 are the same size.

Get the pads for the rear brakes you have.

Get the 90-91 CRX Si steel braided brake lines.
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Old Nov 9, 2006 | 02:59 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (EL Vap133)

[QUOTE=EL Vap133]

Get the pads for the rear brakes you have.

[QUOTE]

the rear pads for a 90-91 teg and 90-91 crx si are the same.
im running si pads on my teg trailing arms right now
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Old Nov 9, 2006 | 03:07 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (mrtoastyjr)

heres a guide i found:
http://www.fourthgenhatch.net/reardiscswap.html

i just picked up a set of 90 CRX rear discs but they havent been used in a while, they were pulled off like 4 or 5 years ago.

i dont know a lot about brakes so im just wondering how close the brake pad should be to the disc? it seems like they are touching when i spin the disc, is that ok? im gonna get them machined anyways but theyre pretty rusty so im not even sure if i should even bother.

http://img.photobucket.com/alb...c.jpg
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Old Nov 9, 2006 | 09:08 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (mrtoastyjr)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EL Vap133 &raquo;</TD></TR><TR><TD CLASS="quote">

Get the pads for the rear brakes you have.

</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mrtoastyjr &raquo;</TD></TR><TR><TD CLASS="quote">[the rear pads for a 90-91 teg and 90-91 crx si are the same.
im running si pads on my teg trailing arms right now </TD></TR></TABLE>

Oh yeah, well try telling that to Autozone employees. Believe me, they will tell you "no it is not the same, my computer here says so". But I love to prove them wrong.
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Old Nov 9, 2006 | 09:09 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (funkified)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by funkified &raquo;</TD></TR><TR><TD CLASS="quote">heres a guide i found:
http://www.fourthgenhatch.net/reardiscswap.html

i just picked up a set of 90 CRX rear discs but they havent been used in a while, they were pulled off like 4 or 5 years ago.

i dont know a lot about brakes so im just wondering how close the brake pad should be to the disc? it seems like they are touching when i spin the disc, is that ok? im gonna get them machined anyways but theyre pretty rusty so im not even sure if i should even bother.

http://img.photobucket.com/alb...c.jpg</TD></TR></TABLE>


Yes, they can touch the disc. Can you see the sensor on the pad?
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Old Nov 9, 2006 | 10:01 PM
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Default Re: 1990 civic si : Rear drum to disc conversion (EL Vap133)

i rmember that the DA compensator arm i think its called is longer than the EF. so basically keep the EF one and throw away the DA ones. all you really need it the trailing arm assembly allong with the disks and califpers plus cables.

thats it.
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Old Nov 9, 2006 | 10:25 PM
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I did the swap about 3 years ago, but regret it in hind sight. It does look better, but performane is no different at all. In fact, back in the day the 90-91 CRX Si's actually stopped 3 ft longer than the 88-89 models with drums.

The rear disk set up also weights more, and considering the cost of the trailing arms/caliper/pad set up, plus getting new ebrake cables, and the labour put into it, i don't think its worth it....just mu opinion.
Its true on other models of cars a disk set up would be an upgrade, but not on an EF.
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Old Nov 10, 2006 | 04:11 AM
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Default Re: (Deetz)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Deetz &raquo;</TD></TR><TR><TD CLASS="quote">I did the swap about 3 years ago, but regret it in hind sight. It does look better, but performane is no different at all. In fact, back in the day the 90-91 CRX Si's actually stopped 3 ft longer than the 88-89 models with drums.

The rear disk set up also weights more, and considering the cost of the trailing arms/caliper/pad set up, plus getting new ebrake cables, and the labour put into it, i don't think its worth it....just mu opinion.
Its true on other models of cars a disk set up would be an upgrade, but not on an EF. </TD></TR></TABLE>

The Crx weighs less. Of course its gonna stop quicker than an EF civic.
Rear discs will stop the civic ef better than if it had drums. PERIOD.
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Old Nov 10, 2006 | 04:37 AM
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Default Re: (Rob.)

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

The Crx weighs less. Of course its gonna stop quicker than an EF civic.
Rear discs will stop the civic ef better than if it had drums. PERIOD. </TD></TR></TABLE>

can i see some proof of this??
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Old Nov 10, 2006 | 05:00 AM
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Default Re: (Pee Wee)

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

can i see some proof of this??</TD></TR></TABLE>

aw here we go, with the whole disc vs drum debate

the facts are that the discs will stay more consistant through a wider heat range than the drums will. when drums get hot they expand and you will loose some braking, with disc you don't, granted the rear brakes only do about 25-30 percent of the braking anyway. will you be able to stop noticably quicker with rear discs? no. i didn't notice a thing when i swapped mine. i know alot of people that autocross with rear drums and they do very well.

me, i swapped to rear disc for cosmetic reasons, i like the way they look so i swapped. call me rice, i don't care, I wanted to do it to MY car.
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Old Nov 10, 2006 | 06:36 AM
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Default Re: (mrtoastyjr)

I only paid $100 for the complete rear setup... including ebrake cables and the prop valve.

It's worth it to me just for the convenience of changing pads and not shoes. It does feel like it stops better, but I suppose that could just be the butt dyno.
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Old Nov 10, 2006 | 06:52 AM
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Default Re: (EJ1 wilcox)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EJ1 wilcox &raquo;</TD></TR><TR><TD CLASS="quote">I only paid $100 for the complete rear setup... including ebrake cables and the prop valve.

It's worth it to me just for the convenience of changing pads and not shoes. It does feel like it stops better, but I suppose that could just be the butt dyno. </TD></TR></TABLE>

same reason i swapped mine.
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Old Nov 10, 2006 | 11:01 AM
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Yeah. There's proof out there that rear discs do negligible if any difference in braking on our civics, only real performance differences is stopping from obscenely high speeds, as stated earlier. Drums have less rotational inertia, so your car will accellerate slightly quicker with them.

But when you have to change the shoes on a drums setup, you'll surely wish you had disc brakes back there. That's half the reason I switched. The other half was that it would have cost more for the new drums/shoes/hardware/cylinders/metal lines running to the cylinders than it did for the rear discs.
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Old Nov 10, 2006 | 11:13 AM
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Default Re: 1990 civic si : Rear drum to disc conversion (EL Vap133)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by EL Vap133 &raquo;</TD></TR><TR><TD CLASS="quote">


Yes, they can touch the disc. Can you see the sensor on the pad? </TD></TR></TABLE>

errr i hate to sound like a noob but what sensor?

and do you really need the prop valve or can I just swap the rta's/cables right over to my hatch? i have the CRX MC if that makes any difference.
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