systems is essential for proper brake balance. Probably
the best way to achieve this is to use two separate master
cylinders with an adjustable linkage between them. These
can be mounted in the front trunk compartment to sim-
plify maintenance.
Front Brakes (F-production 1.500 X1/9)
Several modifications are required in order to use the al-
ternate Lancia 10 inch discs on the front of the Xl/9.
Use the rear discs from a Lancia Beta, PIN 82346816.
Machine the inside of the discs to fit over the X1/9 front
axle flange.
Modify X1/9 stock 3116-inch-thick wheel spacers so
one can be used between each disc and the
X1/9 axle
flange. The spacer
O.D.
should be cut to 4.380 inches
and the I.D. must be relieved to clear the radius on the
axle so it will seat properly.
Carefully deburr the spacer and disc and assemble
them on the axle. Check disc lateral runout with a dial
indicator. This shouldn't exceed about
.005 inch T.I.R.
If it does, correct the problem to avoid having the disc
runout push the pads back in operation.
The aluminum front calipers from the 1500
X1/9
will work well with the Lancia 10 inch discs, but modi-
fied Lancia Beta front caliper mounting brackets and
brake pads must be used. The Lancia caliper bracket is
casting number 1419979. The caliper retaining blocks
and clips and the pad retaining clips from the Lancia
should also be used. The Lancia caliper itself could bc
modified and used, but it is a double piston unit with two
separate hydraulic systems for redundancy and is large
enough to cause space problems in the X1/9 front end.
Thus, the use of the
X1/9 caliper with the Lancia caliper
bracket and brake pads makes a better installation.
Modify the Lancia caliper brackets as shown in
Drawing 14.
Fabricate the caliper mount adaptors per Drawing 15
and weld them to the modified Lancia brackets.
Assemble the caliper assemblies using Lancia hardware
except for the
X1/9 aluminum caliper itself. Use the Lan-
cia brake pads, PIN 823 15602.
Assemble and plumb the brakes on the car. Note that
the steering arm may have to be ground down slightly to
clear the Lancia disc. Check for clearance between the cal-
iper and the wheels and correct any problem areas. Leave
the front dust shield off to allow more air circulation.
The Lancia brakes are available as PBS Kit Number 1.
Front Brakes (G-production 1300 X1/9)
Alternate brakes are not allowed on the G-production
car. Remove the dust shields and use a good grade of
competition brake pads.
Rear Brakes
(G-
and F-production)
Although Lancia brakes could be used on the rear of the
F-production X1/9, this isn't necessary. It is recommen-
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Front Brake Assembly (F-Production) Using Lancia Discs
Lancia Disc, Modified Spacer, Modified Lancia Caliper Bracket
Mndified
Lancia Calioer Brackets
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