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Re: [Healeys] Rear wheel cylinders on a BJ8

To: healeys@autox.team.net
Subject: Re: [Healeys] Rear wheel cylinders on a BJ8
From: Bob Spidell <bspidell@comcast.net>
Date: Wed, 28 Aug 2019 06:41:58 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <F4AB0EDF-5BA7-4AAC-AB09-65E82882FA19@gmail.com> <1a89b369-35b4-1aa4-5ad6-233ce346639a@chello.nl> <CAB3i7L+sPTscE+CA4S6GZ6U+wYysrnUXY_nYFt5Rg-M5TxNXMQ@mail.gmail.com> <fdc7e5f8-d4ae-ab9b-1e37-963af55438e9@comcast.net> <7071bdf2-bdc2-0f05-5632-0e8d30065c33@chello.nl>
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OK, thanks.
Bob

On 8/27/2019 11:24 PM, Kees Oudesluijs wrote:
>
> Same with the car. You loose traction, both sideways and length wise. 
> On a bike you can correct by counter steering with is very direct and 
> by leaning over, in a car you cannot as the wheels react rather 
> indirect on the steering wheel and if you deviate only slightly from 
> the straight ahead direction the rear will pass the front. As the 
> brake forces on the front wheels (as on the rear wheels) will never be 
> 100% equal because of slight differences in the brakes L/R and on the 
> road surface you will not be able to hold the straight ahead direction 
> and thus............ A very good driver may be able to counteract this 
> but the average driver will not, certainly not on a wet road.
>
> Kees Oudesluijs
>
>
>
> Op 28-8-2019 om 02:53 schreef Bob Spidell:
>> OT, a little, but I've never understood the physics of this. When I 
>> ride my bike, I can lock up the rear wheel and all it does is skid.
>>
>> Bob
>>
>>
>> On 8/27/2019 9:29 AM, Michael Salter wrote:
>>> Have to agree with Kees on this one.
>>> We have a brake bias control on AHX12 and I can certainly attest to 
>>> the fact that when the conditions change to "wet" removing a lot of 
>>> rear braking is absolutely essential to prevent the car from 
>>> swapping ends.
>>> As most road cars don't have adjustable brake bias I would be very 
>>> careful in trying to increase the rear braking.
>>> When braking into a corner the last thing you want is the rear end 
>>> coming around, particularly in the wet.
>>>
>>> M
>>>
>>> On Tue, Aug 27, 2019 at 12:09 PM Kees Oudesluijs 
>>>
>>>     Whatch out driving in the rain as the rear brakes will lock the
>>>     rear
>>>     wheels much quicker than with the smaller pistons.Rear brakes
>>>     are only
>>>     providing a small portion of the total brake force.
>>>
>>>     Kees Oudesluijs
>>>
>>>     Op 27-8-2019 om 18:04 schreef Chris Dimmock:
>>>     > Hi Men
>>>     > Has anyone else ever changed their rear wheel cylinders from
>>>     3/4 inch to 7/8 inch?
>>>     > I just did. Sick of the rear brakes doing nothing. Freeloaders!!
>>>     > Yes, no problem with seized wheel cylinders, no problem with
>>>     the flexible hose - just bugger all wear on the rear linings.
>>>     > I'll let you know how it goes on my BJ8
>>>     > Best
>>>


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    OK, thanks.<br>
    Bob<br>
    <br>
    <div class="moz-cite-prefix">On 8/27/2019 11:24 PM, Kees Oudesluijs
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:7071bdf2-bdc2-0f05-5632-0e8d30065c33@chello.nl">
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <p>Same with the car. You loose traction, both sideways and length
        wise. On a bike you can correct by counter steering with is very
        direct and by leaning over, in a car you cannot as the wheels
        react rather indirect on the steering wheel and if you deviate
        only slightly from the straight ahead direction the rear will
        pass the front. As the brake forces on the front wheels (as on
        the rear wheels) will never be 100% equal because of slight
        differences in the brakes L/R and on the road surface you will
        not be able to hold the straight ahead direction and
        thus............ A very good driver may be able to counteract
        this but the average driver will not, certainly not on a wet
        road.</p>
      <p>Kees Oudesluijs</p>
      <p><br>
      </p>
      <p><br>
      </p>
      <div class="moz-cite-prefix">Op 28-8-2019 om 02:53 schreef Bob
        Spidell:<br>
      </div>
      <blockquote type="cite"
        cite="mid:fdc7e5f8-d4ae-ab9b-1e37-963af55438e9@comcast.net">
        <meta http-equiv="Content-Type" content="text/html;
          charset=UTF-8">
        OT, a little, but I've never understood the physics of this. 
        When I ride my bike, I can lock up the rear wheel and all it
        does is skid.<br>
        <br>
        Bob<br>
        <br>
        <br>
        <div class="moz-cite-prefix">On 8/27/2019 9:29 AM, Michael
          Salter wrote:<br>
        </div>
        <blockquote type="cite"
cite="mid:CAB3i7L+sPTscE+CA4S6GZ6U+wYysrnUXY_nYFt5Rg-M5TxNXMQ@mail.gmail.com">
          <meta http-equiv="content-type" content="text/html;
            charset=UTF-8">
          <div dir="ltr">
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small">Have to agree with Kees on
              this one. <br>
            </div>
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small">We have a brake bias
              control on AHX12 and I can certainly attest to the fact
              that when the conditions change to "wet" removing a lot of
              rear braking is absolutely essential to prevent the car
              from swapping ends. <br>
            </div>
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small">As most road cars don't
              have adjustable brake bias I would be very careful in
              trying to increase the rear braking.</div>
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small">When braking into a corner
              the last thing you want is the rear end coming around,
              particularly in the wet.</div>
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small"><br>
            </div>
            <div class="gmail_default" style="font-family:comic sans
              ms,sans-serif;font-size:small">M<br>
            </div>
          </div>
          <br>
          <div class="gmail_quote">
            <div dir="ltr" class="gmail_attr">On Tue, Aug 27, 2019 at
              12:09 PM Kees Oudesluijs &lt;<a
                href="mailto:coudesluijs@chello.nl";
                moz-do-not-send="true">coudesluijs@chello.nl</a>&gt;
              wrote:<br>
            </div>
            <blockquote class="gmail_quote" style="margin:0px 0px 0px
              0.8ex;border-left:1px solid
              rgb(204,204,204);padding-left:1ex">Whatch out driving in
              the rain as the rear brakes will lock the rear <br>
              wheels much quicker than with the smaller pistons.Rear
              brakes are only <br>
              providing a small portion of the total brake force.<br>
              <br>
              Kees Oudesluijs<br>
              <br>
              Op 27-8-2019 om 18:04 schreef Chris Dimmock:<br>
              &gt; Hi Men<br>
              &gt; Has anyone else ever changed their rear wheel
              cylinders from 3/4 inch to 7/8 inch?<br>
              &gt; I just did. Sick of the rear brakes doing nothing.
              Freeloaders!!<br>
              &gt; Yes, no problem with seized wheel cylinders, no
              problem with the flexible hose - just bugger all wear on
              the rear linings.<br>
              &gt; I'll let you know how it goes on my BJ8<br>
              &gt; Best</blockquote>
          </div>
        </blockquote>
      </blockquote>
    </blockquote>
    <br>
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