[Healeys] Brakes -rear wheel cylinders

[simon.lachlan at alexarevel.plus.com]

Just to muddy the waters.....
Back in August 2013 I got terribly bogged down in the Girling 14 and 16 issues. I was attempting to fit BJ8 size callipers and discs onto my Mk II BT7. Guided, I think, by John Rowe I bought old 16s from a guy who broke Ford Capris, Escorts etc. The thing being that there were, still are, two sizes of 16s. One was certainly referred to as "The metric" size and that maybe came out of Fords which had a very much bigger metric footprint in Europe than BMC. The so-called metric, Ford Capri, 16s' mounting holes are 3.25" apart - same as a BT7's 14s!!- and the BJ8's 16's holes are 3.5" apart. Thus the Capri 16s will fit where the 14s used to be....if you see what I mean?
Here's the article I wrote arising from my research on the topic. (I use to write such stuff for our local club's magazine).
Simon

-----Original Message-----
From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Peter Caldwell
Sent: 27 March 2019 18:32
To: healeys at autox.team.net
Subject: Re: [Healeys] Brakes -rear wheel cylinders

Alan,  I must disagree with this a little. As pertains to the front Calipers..... the Type 14 pistons are 48mm   the Type 16 pistons are 54mm

     Peter C

On 3/25/2019 1:29 PM, Bluehealey wrote:
> The 100-6 had drum brakes.
> The BT7 was fitted with discs and Type 14 calipers (7/8” dia. pistons) paired with 3/4” rear cylinders.  That is the way to go.
> BJ8 used Type 16 calipers and also 3/4” rear cylinders. That is also good but gives slightly longer pedal travel. BMC compensated by increasing the Master cylinder size and adding a servo. Not strictly necessary but gave good results with lower pedal effort.
> You pays your money and take your choices.
> If you stay with 1” rear cylinders the rears will lock under hard braking and potentially cause you switch ends.  Not recommended.
> AlanB
> Bluehealey.com
>
>
>> On 25 Mar 2019, at 14:02, Mike MacLean <rrengineer.mike at att.net> wrote:
>>
>> So, I guess since I am putting 100-6 disc brakes on the front of my BN2 I won't have to do anything since both front and rear cylinders are 1" dia.?
>> Mike MacLean
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