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Master
Cylinder Selection Criteria
- Measure the diameter of the pistons in the caliper.
- Formula to determine piston area: piston diameter X
piston diameter X .785 X number of pistons on half of the
caliper = total piston area of one side of the caliper (all that is
necessary to compute necessary data for determining area for optimal
master cylinder bore size).
Example:
1.950 X 1.950 X .785 = 2.98 X 2 = 5.97
- Master Cylinder selection chart (using caliper piston area data)
Caliper Piston Area (in.) Master Cylinder Area (in.) Master
Cylinder Bore Diameter (in.)
| Up to 3.6 |
5/8 |
.307 |
| 3.6-4.2 |
7/10 |
.385 |
| 4.2-4.5 |
3/4 |
.442 |
| 4.5-4.7 |
13/16 |
.518 |
| 4.7-5.5 |
7/8 |
.601 |
| 5.5-5.9 |
15/16 |
.690 |
| 5.9-6.3 |
1.0 |
.785 |
| 6.3-7.6 (maximum) |
1 1/8 |
.994 |
So in this example a Master Cylinder for the front of this car
would respond best to a 1.0 Master Cylinder with a .785 Bore
Diameter.
Also,
don't forget to download my pre and post
grid checklists.
In
the spirit of the sport,
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