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Re: Master Cylinders

To: Alan Seigrist Blue 100 <healey.nut@gmail.com>
Subject: Re: Master Cylinders
From: Magnus Karlsson <magnuskarlsson@bornet.net>
Date: Fri, 17 Nov 2006 08:23:07 +0100
Alan

Of course I believe you. I4m refering to Girling cylinders which was
OEM and all of the cast iron cylinders that I got from them
in that particular internal bore have always been both thicker and
longer.

If yours is made by another manufacturer it can of course look
completely different. The main thing to look out for if one chooses
a brake cylinder from another manufacturer though is that the
internal bore and the stroke is the same. Otherwise the characteristics
of the brakes will be altered.

Magnus

17 nov 2006 kl. 04.41 skrev Alan Seigrist Blue 100:

> Magnus -
>
> If you can believe it the Cast Iron Brake Master on my BJ8 is
> definitely shorter than the standard ali clutch master right next
> to it.
>
> I think there are alot of different manufacturers out there, and
> I've learned that the brake masters come in all shapes and sizes.
> The Clutch masters all seem to look alike, however.
>
> Cheers,
>
> Alan
>
>
> On 11/16/06, Magnus Karlsson <magnuskarlsson@bornet.net> wrote:
> Alan,
>
>
> The correct one for servo brakes is indeed longer than the one for
> the clutch and non-servo brakes.
> However there are several internal bore sizes available for the
> small Girling aluminium master. Of these
> different sizes only the .625 was ever used on the Healey. When
> buying a new master for servo cars
> of the correct .875 size you will find that only cast iron ones are
> available today and that it is noticably
> bigger than the clutch master. Note that the ones originally used
> were aluminium and about the same
> size as the cast iron ones available today.
>
>
> Regards
>
>
> Magnus
>
>
>
>
>
>
>
>
>
>
> 16 nov 2006 kl. 14.38 skrev Alan Seigrist Blue 100:
>
>> Magnus -
>>
>> I've recently learned there are several versions of the Brake
>> Master available in the market.  The one I have is actually
>> shorter than the clutch master.
>>
>> Cheers,
>>
>> Alan
>>
>> On 11/15/06, Magnus Karlsson <magnuskarlsson@bornet.net > wrote:
>> Bill,
>>
>> The brake master cylinder shall have a larger internal bore than
>> 0,625.
>> If I remember correctly 0,875. That cylinder is easy to distinguish
>> between
>> the 0,625 because it is longer.
>>
>> The large bore was used in conjunction with the servo as it moves
>> more fluid,
>> aka gives more force on the calipers and brake cylinders, with the
>> same
>> pedal movement. If used without a servo it would give you a very
>> stiff pedal.
>> If used on the clutch it would give you a little harder pedal but
>> would put a
>> lot of strain on the clutch slave and mechanism as it will give a
>> longer travel
>> exceeding that of the slave.
>>
>> The small bore if used with the servo would give you a very soft
>> pedal.
>>
>> Magnus Karlsson
>> Sweden




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