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Dual MC options?

Discussion in 'Flat Fender Tech' started by BrenGun, Feb 19, 2010.

  1. Feb 19, 2010
    BrenGun

    BrenGun Just Some Guy

    Maine
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  2. Feb 19, 2010
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    You're paying for the brackets and development work needed to make sure that it fits.

    The cylinder looks very similar to a 1972 CJ-5 part:

    [​IMG]
     
  3. Feb 19, 2010
    duffer

    duffer Rodent Power Sponsor 2019 Sponsor

    Bozeman, MT
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    2x. And you will still have to get that lid off to fill it. My take is that it would provide only marginal benefits with the stock brakes.
     
  4. Feb 19, 2010
    BrenGun

    BrenGun Just Some Guy

    Maine
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    Hmm... thanks guys. Maybe I'll look into a mid 70's MC and try to fab a bracket. I'm not so much concerned about better stopping, but would like a "failsafe" in the system. It seems like such a simple idea that even W-O in the late 40's should have made a dual cylinder for safety's sake...
     
  5. Feb 19, 2010
    Warloch

    Warloch Did you say Flattie??? Staff Member Sponsor

    Falcon, CO
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  6. Feb 19, 2010
    windyhill

    windyhill Sponsor Sponsor

    PA
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    bracket is a copy of the one on a 69-71 cj5
     
  7. Feb 19, 2010
    kaiser_willys

    kaiser_willys Well-Known Member

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    I dont know if i would call being able to have some brakes V/s no brakes if you have a brake failure "marginal". as far as stoping power then yes "marginal" is a very good description
     
  8. Feb 19, 2010
    timgr

    timgr Jeepin' Nerd Sponsor 2019 Sponsor

    Medford Mass USA
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    Good ideas always seem obvious in retrospect.

    The dual cylinder was not required by the DOT until 1967 IIRC. Some car makers used it earlier than that. My '66 VW had a dual cylinder, but my '65 F100 did not.
     
  9. Feb 19, 2010
    all4jpn

    all4jpn Member

    fredericksburg,va
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    brengun..keep us posted...hmmmm so a intermediate booster with a 69-71 bracket...
     
  10. Feb 19, 2010
    w3srl

    w3srl Jeepless in Pittsburgh Staff Member Sponsor

    Pittsburgh, PA
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    You can still find the bracket from a '67-'71 CJ if you look around, that is the one Herm's is designed from. They are out there but you have to dig smetimes to find them. ;)
     
  11. Feb 19, 2010
    garage gnome

    garage gnome Rust polisher Sponsor

    Western MA
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    i would just rig up my own bracket out of 1/8" plate.
     
  12. Feb 19, 2010
    BrenGun

    BrenGun Just Some Guy

    Maine
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    Thanks for all the ideas, guys. I will let you know what I do. I'm hoping to get the brakes done by this summer as well as the finished rolling chassis on the Mistress. As before I'm trying to do this more or less on the cheap, so fabbing something together sounds good. I had found this writeup on the CJ3B page courtesy of the Herm link. In this writeup, a MC from a '69 is used.
    http://www.film.queensu.ca/CJ3B/Tech/BrakesDualMaster.html
     
  13. Feb 20, 2010
    mortten

    mortten I can’t put my finger on it

    Peninsula, Ohio
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    I don't think $225.00 is a lot for the piece of mind it provides. Especially with family riding along.
     
  14. Feb 20, 2010
    michigan_pinstripes

    michigan_pinstripes I'm not lost, I'm wandering Sponsor

    Clarkston MI...
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    I've always been a fan of the Wilwood's universal w/remote reservoir since it mounts on our frames pretty easy (drill one hole). These are popular on roundy-round track cars. I have a single on mine which works phenomenal! That was before they offered a dual which is a much better choice, even if $60 more. google shop or ebay: wilwood 260-7563

    If you need one, let me know, I am an aftermarket parts wholesaler :)
     
  15. Feb 20, 2010
    Hawkes

    Hawkes Member

    Nova scotia
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    I think I have one out of a postal Jeep that is the same thing.
     
  16. Feb 20, 2010
    Bill F

    Bill F Finally running

    Hillsboro NH
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    I put one of herms dual kits in an m38. It was hard to make it work right, but the current ownder seems happy with it.
     
  17. Feb 20, 2010
    sammy

    sammy Coca-Cola? Sponsor

    Albuquerque, NM
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    Ended up taking mine to a pro fab shop for the MC install and new lines...The only way for it to fit with the sock L4134 was to notch the frame....
    [​IMG]
    [​IMG]
     
  18. Feb 20, 2010
    ncs

    ncs New Member

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    I've got the kit too. It's for the cj-5. It doesn't fit the cj2a a L-head motor. The bellhousing/engine is in the way. Here's how to make it fit poorly.

    First, cut the stock mount off, which weakens the frame. Then notch the frame, which also weakens it. Drill holes for the bolts, which weakens it some more. Then there's the matter of the brake pedal not being anywhere near where it needs to be.

    Look at sammy's second pic. He bent an s curve in the push rod. It works, but it also puts more angular force on the pedal which makes make it wear out faster.

    I did a similar layout, and it just doesn't seem like a good long term setup. The whole thing is still next to the exhaust pipe and nearly impossible to fill up with the fender on.

    I read something about about using a newer model cross shaft support assembly to fix the pedal alignment, but I never seen any clear pics of it or found a definite write up.
     
  19. Feb 23, 2010
    w3srl

    w3srl Jeepless in Pittsburgh Staff Member Sponsor

    Pittsburgh, PA
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    It's tight, but mine fits in a CJ-2A quite well. I did have to clearance the top strap of the frame by about 3/32" for clearance on the MC lid, but I also could have put a palte in between the bracket and the frame for a spacer.

    Others who have had clearance issues have used banjo fittings to take the brake lines out and away from the bellhousing & exhaust. It's doable for sure.
     

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