ScottF

I know, I know, but I have searched, I have Googled and I have Binged and cannot find a definitive answer.

I recently picked up a complete rear disc swap yesterday and except for the prop valve and trailing arm bushings it is ready to install. I know I am supposed to change the bushings, but the thing that has me stumped is the prop valve.

I have heard so many opinions on this I would like a definite answer as I would like to do this conversion soon.

I have heard that I should change it to a 99-00 Si. I have also heard that the EX will work fine( which I have). The swap is from a 00 Integra, so I have heard the E-Brake cable and hoses I have will work( the conversion is really complete and in good shape) My car does not have ABS.

I do know the trailing arms are the same, and the guy who sold it to me said all I need to do to bolt them up to the UCA and LCA already on the car(told me it was a 17 and 14mm bolt).


If there is anyone with experience with using the EX prop valve, please let me know. I have also heard I should use the existing trailing arms that are on the car, but the trailing arms look IDENTICAL, so who is right on that front?


Any quick help would be appreciated greatly!

Thanks in advance

HondaPartsHero

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/how-put-x-brakes-your-96-00-ek-civic-revised-upgrade-chart-1513752/
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/%5Bfaq%5D-complete-rear-disc-brake-conversion-how-w-parts-pictures-56k-haha-641639/

ScottF

Thanks I missed the first thread somehow

Go_Race_Your_Self

Kev

nealnanoHX

What year is your Civic??? I did the rear disc swap on my 98 HX with 93 Del Sol rear trailing arms and brakes and a 94 Teg coupe E brake cable. I did not need to change the master cylinder or the prop valve. The 99-00 Si w/ rear disc and all 96-00 Civic with rear drum have the same prop valve, same Honda part number. The 99-00 Si does have bigger master cylinder but you dont need it. Reuse all the Civic control arms, only swap the trailing arms.

ScottF

Mine is a 96 EX, I thought I mentioned, but I see that I did not( It was 3am, lol). Do I need to change the HARD LINES???

grumblemarc

iTrader: (4)

Now I know for sure you didn't read anything in this link.
https://honda-tech.com/forums/showthread.php?t=1513752

pinoy_boi

Ok So basically I'm on the same boat as the OP, but I read the first link HondaPartsHero put up and It answer all but one. In his thread, he says to use 99-00 Si rear brake lines because all calipers use the same banjo fitting on the caliper, but it's the fitting that connects to the hard line. So he recommends to get 99-00 Si brake lines(understandable) but in the second link, As I quote
He says if you are using INTEGRA calipers, use brake lines for your calipers. Who is right?
Do the rear brake lines for integra have the same size fitting to the hard line as 99-00 Si brake lines?

Sorry for the off topic convo, I didn't want to clutter up with another thread and I thought the OP might have had the same Q's. OP, if you don't want my reply, I'll edit and delete it for you if you want.

ScottF

I DID read the post, my question was, do I need to replace the hard lines from the master cylinder to the rubber hose? I do know it says to use 99-00 Si soft hoses, but I am asking about the HARD LINES, from the master cylinder to the connection point on the rubber hose part... That was my question.

pinoy_boi

I don't think you would have to unless it's leaking or your just up to the challenge. I know it's the soft lines and maybe the prop. valve.

ScottF

Thanks for clearing that up Pinoy Boi.

I also came across this link...

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/proportioning-valves-explained-why-not-necessary-change-them-1446096/


I guess this is what makes things so confusing. I cannot tell what is correct, I have heard 2 differing opinions, the Si prop valve thing is an "urban legend" and that it is a vitally needed part. If I can get by without it, that would be great, as I have checked and there are currently no 99-00 Si's in stock at any of the local salvage yards... And the dealer wants 120 something for one( which, quite frankly, could be used for other things) So I guess my question on that is, if needed, I can wait until I can afford the extra part, but if not, then I would rather not shell out 120 plus dollars.

ScottF

Thank you for the answer on that. On a related note, why do they say to replace the bushings? From what I can tell via Acura/Honda OEM parts sites' exploded diagrams, they look virtually identical. The bushings on the swap I bought look almost brand new...

pinoy_boi

No problem. Just trying to get the same answers as you haha.
I think they mean change them out for energy suspension bushings. But I'm not sure.
If I were to change the bushings from the trailing arms(which are from an 99 integra,i think) Would I get poly bushings for an integra or a civic??

instructor74

if the rear trailing arm bushings are in good shape I wouldnt replace them. If this is going to be your DD than stay away from poly bushings in the trailing arms. The rear trailing arms bushings are rubber because they have some give to them and will not cause the suspention to bind.

ScottF

They look to be in decent shape, for a 12 year old car. I guess what you would normally find on a part that age.

ScottF

Any answers on the HARD LINE question?? I purchased Si hoses and they do not match.

ScottF

Damn, I missed the part where it says to use Integra brake lines somehow I completely missed that part...

pinoy_boi

At which end did the Si hoses not line up? The banjo fitting or the connection when the hard line connects to the hose?

ScottF

The banjo fitting, but I re-read the article and I think I understand, I need to use the integra hoses if I recall correctly

ScottF

Ok, I missed this somehow: What I mean by harmony is that if you get a trailing arm setup for say, an integra but the brake lines were cut so you take it upon yourself to order up a set of Delsol brake lines instead of just being smart about it and getting replacement integra brake lines. All the various brake lines will mate to the same rear hard line but they different in banjo attachment (and sometimes length) Master cylinders are another beast in themselves. I won't get into proportioning valves in this discussion as I cannot find pictures to back up what I have to say.


I feel like a dumbass now. Haha

Hidenplanvew

dont replace hard lines
Use 94-01 integra rear arm softlines
I used to stock prop valve with disk and it stoped just fine dont worry about it right now

ScottF

Thank You sir!

RockStarKick

I have a 99 ex and I have a 99 si rear disc conversion sitting in the garage, from the research I have done, the prop valves are different between the two (different part numbers) .. The rear ''soft" brakes lines are different as well..

94EG8

I could almost swear '94 - '01 Integra (except ITR), '99 - '00 Civic Si, '92 - '95 Si, and '93 - '97 Del Sol Si/VTEC all use the same rear calipers and brake lines. '90 - '93 Integra are different though. The brake lines must match the calipers.

pinoy_boi

Thats what was going though my mind. Casue 2 of the threads had good points, but now I know because of ScottF lol. Thanks man, now I KNOW not to get Si lines. But now my worry is, if I get integra lines, are the soft line to the hard lines gonna have the same fitting size?(will they thread into each other)