1. What is Brake Pedal Ratio?

The brake pedal ratio is a mechanical advantage factor that determines how much force is transferred from the brake pedal to the master cylinder. It represents the leverage ratio of the brake pedal assembly.

2. How Does the Calculator Work?

The calculator uses the brake pedal ratio formula:

Where:

• \( Upper\ Length \) — Distance from pedal pivot to pushrod attachment point (cm)
• \( Lower\ Length \) — Distance from pedal pivot to pedal pad (cm)
• \( Ratio \) — Mechanical advantage (dimensionless)

Explanation: The ratio indicates how many times the input force is multiplied before reaching the master cylinder.

3. Importance of Brake Pedal Ratio

Details: Proper brake pedal ratio is crucial for optimal braking performance, pedal feel, and safety. It affects braking force, pedal travel, and overall brake system efficiency.

4. Using the Calculator

Tips: Enter both upper and lower lengths in centimeters. Ensure accurate measurements from the pivot point for precise ratio calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical brake pedal ratio range?
A: Most vehicles have brake pedal ratios between 4:1 and 6:1, with performance vehicles often using higher ratios.

Q2: How does ratio affect braking performance?
A: Higher ratios provide more mechanical advantage (less pedal effort) but require more pedal travel. Lower ratios provide less advantage but shorter pedal travel.

Q3: Can I change my brake pedal ratio?
A: Yes, but it requires modifying the pedal assembly. This should only be done by experienced mechanics as it affects overall brake system performance.

Q4: What ratio is best for my vehicle?
A: The optimal ratio depends on your brake system type, master cylinder size, and personal preference for pedal feel. Consult with a brake specialist.

Q5: Does ratio affect brake balance?
A: While ratio primarily affects pedal effort and travel, significant changes can impact overall brake balance and should be carefully considered.