THe only dual MC that would provide different pressure is one that has two different sizes of bore in the cylinder. They do exist, but 90% have the same size in both. There are differences in valving, a car with disk brakes front and drum rear will have a residual pressure check valve in the rear brake cylinder, and non in the front brake cylinder. If it has only one axle with brakes, I would put a single master cylinder on it, not a dual. A dual cylinder would be a bit spongier, but not much. If the cylinder diameter on the old one was 1 inch, and you put a 7/8" dual piston in it it would have more pedal travel, but would apply the brake cylinders harder for the same pedal pressure. It is a direct area of piston change, not diameter. If a vacuum booster will fit in the space, they work well. Hot rodders use 7" boosters quite often when space is a premium. Jim
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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