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Technical Should I use a residual valve?

Discussion in 'Traditional Hot Rods' started by chris101_ny, Oct 6, 2024.

  1. V8 Bob
    Joined: Feb 6, 2007
    Posts: 3,025

    V8 Bob
    ALLIANCE MEMBER

    Mr48chev, air should not be entering any drum wheel cylinders during non use that are in good condition. The only time this may occur is during rapid brake release, when fast piston movement (caused by shoe strong return springs) can pull air past the seals, and is what residuals and cup expanders prevent. The entire brake system should normally remain air tight.
    I have 3 cars with under floor dual masters with internal residuals and have never had any air problems.
     
    Last edited: Oct 11, 2024
    seb fontana, RICH B and MOONRNR like this.
  2. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member


    WHEEL CYL - Cup Expanders _1 - BPN 2208.JPG

     
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  3. twenty8
    Joined: Apr 8, 2021
    Posts: 2,802

    twenty8
    Member

    It has to do with "spreading butter with a machete", but I'm not sure you will entirely understand the concept.

    Why didn't you bother to give an explanation like this in the other thread??? You obviously know your stuff, but it seems that you are not always in the mood to help people out. Instead, out comes the machete.o_O

    As for noone calling out the other guy's post, if you go back and check you will find that I stated that you were correct about the seals returning the pistons away from the rotors.

    And it really is time to get rid of the signature line. It says more about you than it does about anyone else.....;)
     
    Last edited: Oct 11, 2024
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  4. 1971BB427
    Joined: Mar 6, 2010
    Posts: 9,040

    1971BB427
    Member
    from Oregon

    No reason for residual valves at any axle if the master is the highest point. Car makers didn't use them, so why do people put them in today when they build?
    Neither of my cars have residual vales with disc/drum setups, and my last build was drums all around and I plumbed them without residual valves. All of them stop great and no pedal height issues.
     
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  5. This is only correct if the wheel cylinders have cup expanders in them. There’s a reason why oem drum systems used one or the other.

    Car manufacturers did use them!
     
  6. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

    That is not the problem. The poster stated this and by now should know he was incorrect. Have you seen an apology? Maybe he IGNORED me (whoopty-do) and has not either realized/ corrected his post and/or apologized (not that it matters to me). He is still posting.

    Do you now understand how all of this disinformation keeps getting spread?

    It seems maybe I have awakened a few and the facts are starting to be pointed out. This thread has taken a new direction.

    BTW - I am here to pick-up knowledge, not win a popularity contest.
     
  7. As much as I may not agree with @MOONRNR approach, I can relate to the frustration f seeing outright wrong information about brakes over and over and over again.
     
  8. 2OLD2FAST
    Joined: Feb 3, 2010
    Posts: 5,624

    2OLD2FAST
    Member
    from illinois

    If you're planning on correcting all the dis-information on just this forum , you really need to roll your sleeves up . Simply say that's not true & be done with it , life's waaaay too short
     
  9. twenty8
    Joined: Apr 8, 2021
    Posts: 2,802

    twenty8
    Member

    Yep, I get where you are coming from......... just don't agree with the way you go about it.

    And, as for this.....
    ...... there is no danger of that happening.....:rolleyes:
     
    Last edited: Oct 12, 2024
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  10. jimmy six
    Joined: Mar 21, 2006
    Posts: 15,900

    jimmy six
    ALLIANCE MEMBER

    I know your car guys and good ones but why would you drive and do a photo shoot with a sticking throttle or “needing to ride the brakes” that’s insane.
     
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  11. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

    Why would a novice that comes here seeking TECH KNOWLEDGE, be given incorrect info and others swear by it?

    It can lead to the same situation(s).

    The COMET owner up-graded the power of the car and did not check or upgrade the brakes (previously modified but out of current tech and not up to the power upgrade).

    I bet he learned to do it correctly after that.

    If one modifies a car incorrectly and busts his a$$, that is one thing. You involve innocents and that is another.

    You are giving the hobby a bad name and drawing the wrong attention.

    As for the SIGNATURE, that stays. He treated me in a similar fashion.
     
  12. chris101_ny
    Joined: Aug 3, 2011
    Posts: 123

    chris101_ny
    Member

    I meant no malice and accidentally replied to the wrong thread. trying to joke about it bc whats the point of being negative, it really serves no purpose. We're all just filling our time, whether it has a very specific purpose or for mild entertainment by just reading about hot rods. I was actually I have some clue, but no where enough that I can get through it without assistance. I absolutely appreciate all of the assistance I am offered, this time and any other time I have sought it in the past!
     
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  13. chris101_ny
    Joined: Aug 3, 2011
    Posts: 123

    chris101_ny
    Member

    I meant no malice to anyone! Just trying to joke about it bc what's the point of being negative, life's too short. We're all just filling our time, whether it has a very specific purpose or for mild entertainment by just reading about hot rods. I actually have some clue, but nowhere near enough that I can get through it without assistance. I absolutely appreciate all of the assistance I am offered, this time and any other time I have sought it in the past!
     
  14. Budget36
    Joined: Nov 29, 2014
    Posts: 14,335

    Budget36
    Member

    I didn’t take anything you said as malice. Personally I thought you were diffusing things.
     
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  15. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

    You need to turn your reverb off ...
     
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  16. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member



    POST #68.png
    POST #76.png
    POST #79.png
    ORIGINAL THREAD - https://www.jalopyjournal.com/forum/threads/another-master-cylinder-question.1320288/

    And I am wrong for calling him out? He most likely has me on IGNORE as he has not admitted here that his brake theory in incorrect and actually down right dangerous. Shows his character.
    You can also see the heroes that agreed with him

    Now maybe you will understand the attitudes on this forum and the constant misinformation being given.
     
  17. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

    Because the man is a MOE-RON and most likely got his understanding of BRAKE THEORY here.

    The reason(s) for the failure are obvious.
     
  18. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member

    Uh ...

    Yes, car manufacturers did use them.
     
  19. twenty8
    Joined: Apr 8, 2021
    Posts: 2,802

    twenty8
    Member

    Turns out you were correct about this as well......
     
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  20. MOONRNR
    Joined: Dec 30, 2023
    Posts: 212

    MOONRNR
    Member


    Just another exciting installment of -

    THE H.A.M.Bone 'WILLY STOP' BRAKE THEORY​
     

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