I got front Spindels out of a 1990 Integra and put it on my 1991 Civic HB with new Calipers i bleed the breaks all the way around. Theres no Air left. The breaks are firm when the cars off but when i turn it on and try to break its goes 75% way down befor it compleety stops. I bleed it again and no air. Some one please help me??? My breaks were working OK befor I did the swap

 

You should swap the master cylinder to a larger one, you're pushing more fluid for the larger brakes. Think about the volume of the MC, it has a certain bore and stroke. Given a fixed bore you are pushing a longer stroke to move the same amount of fluid. Increase the bore, and the stroke can be shorter. Volume=Bore X Stroke. Volume and Bore are fixed for a given MC, and you provide the stroke. I didn't change my brakes, but used a 15/16" Prelude MC. It's an easy swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by downest &raquo;</TD></TR><TR><TD CLASS="quote">You should swap the master cylinder to a larger one, you're pushing more fluid for the larger brakes. Think about the volume of the MC, it has a certain bore and stroke. Given a fixed bore you are pushing a longer stroke to move the same amount of fluid. Increase the bore, and the stroke can be shorter. Volume=Bore X Stroke. Volume and Bore are fixed for a given MC, and you provide the stroke. I didn't change my brakes, but used a 15/16" Prelude MC. It's an easy swap.</TD></TR></TABLE>

 

next time try tapping on the components with something metal to dislodge the air bubbles. sometimes they get stuck and you can bleed all day and not get them out.

 

The problem has nothing to do with the M/C, though you should swap it as well. Keep bleeding, you still have air in the lines. Try a gravity bleed open the bleed valves and sit there and make sure the M/C doesn't go dry. Will take about a half hour, but it'll get the air out.

Make sure to bleed all four wheels.

 

i have da front and rears on my have. i never got around to changing the prop valve or mc but my pedal is good and they stop awesome.
try having someone push down on the pedal as you open the bleeder.as apposed to pumping

 

Thanks for all the Info, i will keep trying and looking into the DA M/C... Do i need to change the Booster for the DA m/c

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 10MinSi &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for all the Info, i will keep trying and looking into the DA M/C... Do i need to change the Booster for the DA m/c</TD></TR></TABLE>

yes but i don't think you have to if you use a 88 prelude si prelude master, which has the same bore size as the da.

click on downest's link

 

It's possible the brakes are bled all the way, the EF brakes just have shitty feel. Yes, you can use the 88 Prelude 2.0Si master cylinder, it bolts up to the stock booster. There's a similar accord booster, but I don't know which. The Prelude one requires that you bend one of the brake lines a little bit, here are some comparison pics so you can see what I mean, the new MC vs the old:

 

So if i use the M/C off a 88 Prelude 2.0Si is should bold right up and have the same bore size as the da?

 

Bump

 

Do NOT use the Prelude M/C, the brake lines don't line up.

Why do you guys keep recommending a M/C with different lines when there's more than one that lines up? I do not understand.

1990 Acura Integra 4-door M/C is 15/16ths and the lines are correct also 1990 Honda Civic EX 4 door 15/16th. If any one knows of a one inch let me know.

 

I knowthis that today at the parts place. But i took the day off today from my car Thanks for the good info keep it comeing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX7 &raquo;</TD></TR><TR><TD CLASS="quote">Do NOT use the Prelude M/C, the brake lines don't line up.

Why do you guys keep recommending a M/C with different lines when there's more than one that lines up? I do not understand.

1990 Acura Integra 4-door M/C is 15/16ths and the lines are correct also 1990 Honda Civic EX 4 door 15/16th. If any one knows of a one inch let me know.</TD></TR></TABLE>

so you don't have to use a teg booster to use a 4 door MC? i know the 2 door teg's MC the mounting tabs were 90 degrees off from an ef? but a 4 door they line up?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX7 &raquo;</TD></TR><TR><TD CLASS="quote">Do NOT use the Prelude M/C, the brake lines don't line up.

Why do you guys keep recommending a M/C with different lines when there's more than one that lines up? I do not understand.

1990 Acura Integra 4-door M/C is 15/16ths and the lines are correct also 1990 Honda Civic EX 4 door 15/16th. If any one knows of a one inch let me know.</TD></TR></TABLE>

I used the Prelude MC, as in the write up, and it's fine. A lot of people use it too. The lines are very close, and they do bolt up, it's not a problem. Like someone else said, the point is that you don't have to use another booster, just replace the MC.

 

I used a Prelude MC as well. You only have to bend the one line, and just a little bit, seriously, it takes 2 seconds and it's done.

Plus you don't have to replace the brake booster.

Upgrading the MC improved the pedal feel soooo much! Seriously, the brake pedal is so much firmer now and it has a way better feel to it. I also upgraded to a 4040 prop valve when I installed the integra rear disks as well.

Oh also, after I installed the rear disks with 4040 prop valve (before the new MC), my brake pedal was the same way. It was solid with the car off, but in traffic and stuff, the pedal had a lot of travel and if I kept steady pressure on the pedal it would slowly sink. The car would stop fine, but I didn't like the increased pedal travel (like already described in this thread).

My advice, replace that MC with a 15/16 unit and you will be so much happier!

The new cap compared to the old, just a bit bigger!


Bench bleeding device I rigged up


Old MC


New MC = BAM!

 

what car does the 4040 prop valve your talking about come off of? Thank you i have been in need of good INFO

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 10MinSi &raquo;</TD></TR><TR><TD CLASS="quote">what car does the 4040 prop valve your talking about come off of? Thank you i have been in need of good INFO</TD></TR></TABLE>

1990 Integra works. Just be sure that you get the one that is NOT for anti-lock brakes.

 

I got my 4040 prop valve from the same DA that I got the rear disk brake setup from. The car had just been in a front end colision and he was parting it out so I got the complete rear disk setup with ebrake cables and the 4040 prop valve for $100.

 

90 Integra 4-door non-abs is what I have. Stock booster and 15/16ths and correct line position, or use the 90 EX 4-door one same thing.