Got my DISC BRAKES installed. EXCITED! PICS INSIDE.

Discussion in 'Technical' started by 510madmav, Jul 22, 2009.

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  1. 510madmav

    510madmav Member

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    [​IMG]

    so installation was fairly smooth. bled the FRONT only, very thoroughly. slapped the wheels on and took off down the street.. the pedal is somewhat soft and lower than what i would like, or expected. the rotors seem to have more drag than they should. how much drag is normal? the performance of them was was under my expectations; not as sensitive as i hoped. have i done something wrong here?:huh:

    thanks guys
     
    510madmav, Jul 22, 2009
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  2. facelessnumber

    facelessnumber Drew Pittman

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    Still using a drum master cylinder?
     
    facelessnumber, Jul 22, 2009
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  3. 510madmav

    510madmav Member

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    sorry forgot to specify. i still have my stock drum/drum MC and my drum/drum prop valve.
     
    510madmav, Jul 22, 2009
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  4. blugene

    blugene Senior member Supporting Member

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    Did you modify the brake hose fittings? Just wondering cause if I remember, they point the opsite way.
     
    blugene, Jul 22, 2009
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  5. ratio411

    ratio411 Member

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    Oil or grease on the rotor will cause lesser performance.
    Old brake hoses could as well.
    If the pedal is low/soft, I might be looking at bleeding ALL the system, as well as adjusting the rears. That is likely to show improvements.

    Good luck!
    Dave
     
    ratio411, Jul 22, 2009
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  6. 510madmav

    510madmav Member

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    thank you dave, i'll bleed the rear tomorrow.
     
    510madmav, Jul 22, 2009
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  7. Bryant

    Bryant forgot more than learned

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    the timeless question of does the drum drum master work with disk drum set ups. i suspect that your problem is because the m/c bore is too small for the disks. get disk drum m/c.
     
    Bryant, Jul 22, 2009
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  8. Bryant

    Bryant forgot more than learned

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    is there paint on the rotors? paint will cause the brakes to not work well at all.
     
    Bryant, Jul 22, 2009
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  9. rad1j

    rad1j Member

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    use a 89-91 grand marqi master brake junk yards are full of them dump the booster and just use the master cyinder they work great did you put residual valves in front and bac also ?youll need em and they call for diferent pressures
     
    rad1j, Jul 22, 2009
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  10. 510madmav

    510madmav Member

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    guess I'll be changing my mc. I'll get a new one.
     
    510madmav, Jul 22, 2009
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  11. sierra grabber

    sierra grabber Certifiable

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    just get one for a 74 or later mav, non power disc ;)
     
    sierra grabber, Jul 22, 2009
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  12. 510madmav

    510madmav Member

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    yep. thanks
     
    510madmav, Jul 22, 2009
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  13. fastback86

    fastback86 Loose cars and fast women

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    Lot of people say they're still using the drum/drum master w/disc brakes with no problems. I'm in the process of converting mine and will keep the drum/drum mc and proportioning valve for now. What do you have on the back, disc or drums? If your rears (drum or disc w integral parking brake) not adjusted properly you'll have a low or soft pedal like Ratio411 said. Could also still be air or any of the aforementioned problems.
     
    Last edited: Jul 22, 2009
    fastback86, Jul 22, 2009
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  14. fastback86

    fastback86 Loose cars and fast women

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    He must have, I just did mine and did it the same way. They originally went over the hose bracket and looped back around.
     
    fastback86, Jul 22, 2009
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  15. Bob Wiken

    Bob Wiken Chronologically Gifted

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    I left the MC, PV on when I did my conbversiotn. I've had no problems. Goos pedAL but you do have topress hard as you don't have the power assist. pedal is high and firm, like a high school cheer leader
     
    Bob Wiken, Jul 22, 2009
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