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Custom Park Brake Ideas???

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Brian 89KBlazer, May 16, 2001.

  1. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    I guess like most people here, I'm all in favour of saving money but NOT!! at the expense of Safety. I'm doing the rear disk swap on my 14FF & am looking at the cost of the caddy calipers with the park brake. The GM 44 calipers are approx. 1/3 the cost for me & it got me wondering.
    If there has to be a mechanically operated park brake in order to pass DMV inspection; would the following idea pass & does anyone see any saftey questions??
    My idea in looking at the vented rotors is that they have all these deep slots in the edge of them all the way around the circumference. What if you had a steel spike that was mounted above the rotor's edge on a pivot. A cable from the park brake lever could push the spike into the next aligning rotor vent hole & provide a locking brake. When you pull park brake off, the cable would pull the spike out of the rotor & allow it to spin freely. It would be the same principle as using a screw driver in the vent holes through the caliper window to prevent the rotor from turning.

    This would provide a mechanically operated brake but allow you to use cheaper calipers. Also, if the failure of the cable was a concern, a spring could be incorporated to push the brake off so that it doesn't accidentally "fall" into a slot & jam the brakes on while driving.
    Comments? Feedback?

    I know it's work but my time is free to me and Caddy Calipers are NOT!![​IMG][​IMG]

    Thanks
    Brian
    89KBlazer
     
  2. JST12

    JST12 1/2 ton status

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    Brian,
    I have heard of folks using a simpler technique. You can buy a line-loc from racing parts stores like Summitracing.com and others for $50. It will hold brake pressure on the disks and acts as a parking brake. Seems pretty cool if it will work over a long period of time and not lose pressure. JT
     
  3. Chris Demartini

    Chris Demartini 1/2 ton status

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    <font color=blue>The pin idea could work for parking, but the whole idea of the parking brake (and failing inspection without it) is to provide some means of braking if hydraulic presure is lost. The Park-Loc is hydraulicly controlled so you will still fail inspection with it. I got the eldorado calipers but I dont like them and I want to switch to stock fronts, I have a few ideas I'm working on right now as far as the e-brake goes.</font color=blue>

    [​IMG]
     
  4. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    That's just it biggray71. This is a fully mechanical linkage. The hydraulics can go fly a kite [​IMG] & the park brake would still be on until the lever is pulled to release it[​IMG]

    Thanks for the input, though

    Brian
    89KBlazer
     
  5. mpascino

    mpascino 1/2 ton status

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    Would the calipers from a 79-85 eldo or seville work? I have those things growing out my a$$ or are they too small?

    You call that dirty!?
     
  6. 79Jimmy

    79Jimmy 1/2 ton status

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    The problem I see is that it provides no braking action, just a means of holding the vehicle when its already stopped. Its not an emergency brake which would probably not pass an inspection. The e-brake is a mechanicaly "backup" in case of hydrolic failure at speed.
    Wouldn't be pretty if it got engaged on the hiway. Just my 2 cents.

    James

    79jimmy@home.com
     
  7. Brian 89KBlazer

    Brian 89KBlazer 1/2 ton status

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    79Jimmy

    That's a good point that I didn't consider. I guess I'll have to check out the local laws & see if it's an "emergency brake" that's required or a "park brake". Mine would satisfy the park brake requirement (I guess) & the locking up while on the highway would not be an issue. It's fail mode would be open; not closed.

    Thanks for the input though

    Anyone else??

    Brian
    89KBlazer
     
  8. Shawn

    Shawn 1/2 ton status Premium Member Author

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    IMHO- Sounds like you'd be spending more than it's worth for your time to do such a setup. Like someone said, it probably wouldn't work at high speeds and I'm not too sure if the rotor vents are strong enough. Another question to ask yourself is how much is safety worth to you and your family? I'd suggest spending the extra on the Eldo calipers. My Eldo calipers are working fine. I wonder if Bear or Willwood offers better calipers with a ebrake function? I'm sure it would be more than the Caddy's though.

    Shawn
    87 K5
    few mods[​IMG]
    <A target="_blank" HREF=http://www.off-road.com/chevy>http://www.off-road.com/chevy</A>
     
  9. michaelm

    michaelm 1/2 ton status

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    [​IMG]

    <A target="_blank" HREF=http://www.wilwood.com/products/calipers/msc/index.html>http://www.wilwood.com/products/calipers/msc/index.html</A>

    this is the product you are looking for.
     
  10. BadDog

    BadDog SOL Staff Member Super Moderator Author

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    Or talk to Jess (<A target="_blank" HREF=http://www.highangledriveline.com>http://www.highangledriveline.com</A>) about the shaft disk e-brake he is working on. Not sure how long till it is available though.

    Bad Dog

    85 K30 CUCV, 350 TBI, TH400, NP205, D60/C14, 4.56 Locked
    Soon: 4" lift, 40" tires, massive cutting, shorter wb and rear overhang.
     
  11. HarryH3

    HarryH3 1 ton status Author

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    The later calipers won't work. They don't open wide enough. [​IMG] You could probably sell them to the Jeep folks though. They use those calipers to do rear disc conversions, since they're using a thinner rotor than GM trucks use.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <A target="_blank" HREF=http://ThunderTruck.ColoradoK5.com>http://ThunderTruck.ColoradoK5.com</A>
    It's a great day to be alive...
     
  12. Kyle89K5

    Kyle89K5 1/2 ton status

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    If you've still got your 241, look at doing a slip yolk elim kit with the flange style cv shaft. Bayou Geep has the elim kit and High Angle Driveline has got the CV shaft. Sandwitch a rotor from a motorcycle(or even have someone make you one) then do a small mechanical caliper like the wilwood shown above of a custom bracket.

    The other option would be to contact TSM again and see if they've got a pinion mounted e-brake. I know that they've got em for a Ford 9in, they might be able to work something up for a 14 bolt. All this may take a little fab work, but at least they're options.

    I'm not much on the pin idea, if that thing got pressed in at speed, well, think bad thoughts, that's liable to be what happens.



    Kyle
    89K5
     
  13. Logan

    Logan Registered Member

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    I saw this on the Toy 4x4 board on Off-Road...
    http://www.off-road.com/toyota/trailtoydec00.html

    It's a transfer-case mounted disc brake -- Neat idea, but it'd be tough to rig something similar on something like a 205, since the shaft doesn't bolt up to it like on the 'yotas.

    -Al.
     
  14. 90blzr

    90blzr 1/2 ton status

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    biggray71--- Why dont you like the caddy calipers??
     

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