Folks,
A few weeks ago I noted that I had changed to a dual
inline master cylinder on my Tiger II. The bore is 13/16
and so far it has worked like a champ. Peddle pressure is
less than the original 7/8" Girling ( without the power
booster).
The master cylinder is from a 84 to 86 Mustang with power brakes.
I use the cylinder without the power booster. The cylinder is
aluminum and the "Parts Master" number is 10-1907. Adapters are
required to mate with the 3/16" lines. These are Edelmann Brass
258350 and 258303. The fittings come out the passenger side of
the cylinder. I fabricated a push rod from a grade 8 bolt welded
to a "U" shaped yoke. I also fabricated a spacer for the master
cylinder that is about twice the thickness of the normal Girling
spacer. I cut the right mounting tab and redrilled it closer to
the cylinder to miss the steering column. If you still have the
clutch master cylinder you may have to do the same to the left side
and drill two more holes in the dash at right angles to the original
master cylinder bolt holes.
Alternative is to fabricate a spacer ( aluminum) that has provisions
to mount in the original firewall bolt holes and also mate with the
Mustang master cylinder. This spacer would be "X" shaped.
Since the master cylinder is from a very rare car, I had to spend $19.62
for the cylinder, core charge, fittings and tax. 8-)
Brake line connections are:
For the rear there is a coupler underneath on the right side of the
transmission tunnel. I took standard US 3/16" brake line, cut off one
end and placed one of the coupler's female fitting on the new line.
A double flare done with the RIGDID flaring tool completed that line.
For the front I ran a line to where the 4 way fitting
previously existed. If you use the 4 way fitting (plus brake
light switch) then use a british 3/16 bubble end at the fitting and
use a flaring tool to convert the bubble on the master cylinder end to
a US flare. The 4th hole must be sealed. Suggest that a short
length of original brake tubing be sealed with silver solder to
solve that problem. Be sure you clean the old line inside before
you attempt to silver solder it shut.
I will soon convert my Alpine to dual master cylinder.
About 5 years ago the front brake steel line of the Alpine failed
when my daughter was driving and she crashed. Fortunally it
was a very minor crash as she was in a shopping center parking
lot at the time and she simply crashed into a concrete curb.
I am aware that a dual master cylinder on a Tiger or an
Alpine will upset some people because it is no longer original.
So be it. I also changed the British air out of my tires a long time ago.
James Barrett Tiger II 351C and others
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