Big brake conversion problems...

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Old Jun 8, 2004 | 06:22 AM
  #1  
Johnny G's Avatar
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Default Big brake conversion problems...

basically i have put bigger discs and calipers all round on my UK VT..

the fronts are now 282mm with matching calipers, and the rears are 262mm with matching calipers...

the problem is that the rear pads are not making full contact with the discs, so there is a ring of rust round the discs

i bought everyting S/H, discs were very rusty to start with, but i knew that after a few miles tis would disapear. They were of a car which was a year old.. the fronts are fine

Could this be related to the MC, which has now not got enough power to push fluid to these bigger calipers, or is it something else

here is a pic of the car and brakes... enjoy!

the rust is on the inside of the disc btw




Thanks for looking

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Old Jun 8, 2004 | 06:36 AM
  #2  
crx_88_si's Avatar
 
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From: Somewhere, Ontario, Canada
Default

Does your pedal go really far down now when u press the brakes?

Did u turn the rotors?

Were the pads New??
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Old Jun 8, 2004 | 06:39 AM
  #3  
Johnny G's Avatar
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Default Re: (crx_88_si)

i used to have big fronts, and std rears, and the pedal travel has now increased

turn the rotors?

the pads were S/H

cheers
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Old Jun 8, 2004 | 07:02 AM
  #4  
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Default

The rear brakes don't do all that much to begin with. By increasing the size, you're usually decreasing the pressure, because the force from the brake booster remains the same.
In short...the rear isn't wearing out quickly enough to seat the pads on the rear rotors.
You can flatten the pads with course sanding pads. You could have the discs turned. That should fix the problem.

INcreased pedal travel makes sense too. You are moving around a substantial larger amount of fluid. Installing stainless lines gives a more solid overall feel, and should cure most of your problem as far as pedal travel.
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Old Jun 8, 2004 | 07:05 AM
  #5  
Johnny G's Avatar
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Default Re: (SETI20)

so in short your saying that changing the rears was a bad move?

i have braided lines..
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Old Jun 8, 2004 | 07:07 AM
  #6  
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Default Re: (Johnny G)

can i not change the Master cylinder.. would this not increase the force needed to cope with the bigger calipers?

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Old Jun 8, 2004 | 03:07 PM
  #7  
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Default Re: (Johnny G)

anyone know?
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Old Jun 8, 2004 | 03:12 PM
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From: camden, de, usa
Default Re: (Johnny G)

use a 89 accord lxi mc and you should get 15/16 if that is what your looking for. Otherwise you can use an integra mc and brake booster but you have to change both.

DEF
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Old Jun 8, 2004 | 03:16 PM
  #9  
Johnny G's Avatar
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Default Re: (deftones0817)

what engine is in the accord?
we get differnt models over here..

thanks for the advice
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Old Jun 8, 2004 | 04:45 PM
  #10  
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From: camden, de, usa
Default Re: (Johnny G)

hmm good question. How is the mc mounted on crx or civic on jdm euro ones? is the bolt wholes like this / or this \ ???? i hope you understand what i mean. On a usdm engine bay the bolts are like this \ on master cylinder if your looking at engine bay from front of car. They are same way on an accord in usdm also. I'm pretty sure that is how it is on euro ones also. To figure out engine go into the accord forum and ask what engine is in a 1989 lxi accord.

DEF
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Old Jun 14, 2004 | 07:42 AM
  #11  
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From: bellingham, WA, united states
Default Re: Big brake conversion problems... (Johnny G)

you need a itg master cylinder and it will solve the travel problem because it is bigger and willl move more fluid faster just try it trust me i did it on my rex and makes it alot shorter but also use stainless steal lines too
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Old Jun 14, 2004 | 07:48 AM
  #12  
Jonathan_ED3's Avatar
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What brakes are those? And what does S/H mean?

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Old Jun 14, 2004 | 08:07 AM
  #13  
5litereater's Avatar
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From: Greensburg, PA
Default Re: (Jonathan_EH)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jonathan_EH &raquo;</TD></TR><TR><TD CLASS="quote">And what does S/H mean?</TD></TR></TABLE>

i was wondering the same thing
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Old Jun 14, 2004 | 10:03 AM
  #14  
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Default Re: Big brake conversion problems... (Johnny G)

Turn the rear brakes. Get a 90-93 Teg Booster with the proprtion valve this should solve your problem. Make sure the system is bled really good also.
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