[Healeys] Disk brake conversion

Simon Lachlan simon.lachlan at homecall.co.uk
Mon Aug 29 13:06:38 MDT 2016

Wasn’t this very topic covered quite recently?

Some very precise, and doubtless satisfactory,  answers emerged.

Something to do with the shape of the caliper militating against getting the
air out too easily? Can’t remember....

I’ve got BJ8 size calipers in my MkII BT7 but they came out of a Ford,
Escort I think.



From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of Ross
Sent: 29 August 2016 16:47
To: healeys at autox.team.net
Subject: [Healeys] Disk brake conversion



I have installed a front disk brake conversion on my 58 BN6. The brake kit
was supplied with the uprated calipers, which use the larger BJ8 pads
(vendor description).

The system was bled and the pedal firm. Initial drives indicate very little
front brake support. 

The next recommended move was to replace the rear drum brake wheel
cylinders, from 1” to 5/8”. That was done with no recognizable improvement.

The next move is to switch out the master cylinder from ¾”  to 5/8” as per
the non-servo disk brake BN7.

In this case should the push rod length be changed as well to get increased
fluid into the front disks? 

Or is a proportioning valve a better way to go?



Ross Maylor

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