I've just got home from a weekend away (not in the b unfortunately) and have
been going through this thread...
fwiw, the 1967 factory special tuning booklet i have has this to say on the
subject of brakes:
<quote>
Brakes
After many consecutive applications of the brakes during competition driving
some brake fade may be experienced with the standard linings. Competition
front disc pads and rear brake?shoe linings or lined shoes are available
(see list). The rear linings are made to a thickness suitable for grinding
to radius after fitment. The front pads are of a suitable heavy?duty
material. With fair competition driving these linings will be free from
fade, but will give a harder pedal effort on application.
When the lining friction value is altered from that of the standard car it
may be found that changing the rear wheel cylinders to ones of smaller size
(3/4 in. [19.05 mm.] dia.) will improve the front to rear brake ratio.
As these wheel cylinders have a dowel on the fitting face, it will be
necessary to drill a hole in the back plate to match this dowel.
Braze a steel plug in the existing hole and face off level with the plate
before drilling the new hole. The size of the hole is .170 to .175 in. (4.32
to 4.45 mm.) dia. and drilled .578 in. (14.68 mm.) above the centre of the
cylinder mounting hole and .350 in. (8.89 mm.) offset from the radial
centre?line of the cylinder mounting hole.
When using your car on a racing circuit always remove the dust shields from
the front disc brakes. This will enable the discs and brakes to run at a
lower temperature and will decrease the possibility of brake fade.
<unquote>
Make of that what you will.....but it seems the factory is recommending
SMALLER rear wheel cylinders for uprated brakes, not larger...
cheers..
Tim
Sydney, Australia
66 B rdstr YGHN3-3238
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