# How do you determine pedal ratio?

To determine the pedal ratio you need to measure the height of the pedal to the pivot point then divided the measurement of the pivot point to the lower arm that controls your rod to the master cylinder. C = pedal ratio A divided by B equals C Or example 9″ divided by 1.5″ equal 6 to 1 ratio.

Increasing the pedal ratio increases leverage and pedal travel. Conversely, decreasing the ratio yields less leverage and pedal travel along with increased pedal effort.

Similarly, how do I calculate master cylinder size? To get to this number you use the formula for Area which is: Area = 3.14 (Pi) multiplied by the radius squared. So you calculate the radius of 1” bore which is simply half of the diameter which equals . 5” (half an inch). The result is that a 1” master cylinder has a radius of half an inch.

Additionally, how do you increase brake pedal ratio?

In order to increase the brake pedal ratio, a new hole must be drilled in the pedal arm. To avoid a hard angle on the master cylinder pushrod, the master cylinder placement must change.

What is leverage ratio?

The leverage ratio is the proportion of debts that a bank has compared to its equity/capital. There are different leverage ratios such as. Debt to Equity = Total debt / Shareholders Equity.

### What is brake ratio?

“Braking ratio, usually expressed as a percentage, is the force pressing the brake shoes against the wheels compared to the weight of the car. For easy comparison, braking ratio normally is stated at 50 PSI brake cyl. pressure”.

### What is brake pedal force?

pedal force is about 400 newtons. it is recommended that no more than this force be. required to attain near maximum braking capability from a passenger cer.

### Does master cylinder bore size matter?

Logic would tell you that a larger bore size in a master cylinder should produce more pressure but that is actually not true. Whereas if you have a larger bore master cylinder it is actually going to produce less pressure, its actually going to give you a harder pedal feel as an end result.

### How much fluid should typically be in a master cylinder?

Look inside the master cylinder. The brake fluid should be up to the “Full” line on the side of the cylinder or within 1⁄2 inch of the top of each chamber. If it isn’t, buy the proper brake fluid for your vehicle and add it until the level meets the line.

### How much travel should a brake pedal have?

Make sure there is room between the brake pedal and the floorboard with the brakes applied. Not all manufacturers specify a pedal reserve distance however there should be at least 2 inches of travel before the brake pedal hits the floor. Many factors affect pedal reserve.

### What causes excessive brake pedal travel?

EXCESSIVE BRAKE PEDAL TRAVEL Possible causes include worn brake linings front or rear (or both), misadjusted drum brakes, or air in the brake lines. This can be dangerous because the brake pedal may run out of travel before the brakes are fully applied.

### How many PSI is a car brake?

Typical full-lock operating pressures on conventional OEM-style automotive hydraulic-brake systems are 900–1,000 psi (69 bar) with manual brakes and 1,400-plus psi (96 bar)with power-assisted brakes.

### How is master cylinder pressure calculated?

The formula for pressure is force divided by the surface area. If the master cylinder has a 1-inch bore, the piston’s surface area is . 78 square inches. If you divide the output force of 434 lbs.

### What is the typical front wheel rear wheel braking ratio?

What is the typical front wheel/rear wheel braking ratio? Front wheels, 60-70 percent; rear wheels, 30-40 percent.

### What is braking efficiency in cars?

The brake efficiency, which is expressed as a percentage, calculates how effective your brakes are when you lightly and heavily tap on them, according to the “M.O.T Inspection Manual.” The brakes’ efficiency is dependent on the weight of your vehicle and the force of your brakes.

### How much braking power do the front wheel brakes handle?

The front tires therefore gain more traction, and they can take more braking force to stop the car. Because the front brakes generate up to 75 percent of the vehicle’s stopping force, they generate much more heat, over 500°F in heavy braking.