1. What is a 4 Link Calculator for Drag Racing?

Definition: This calculator helps determine critical suspension geometry parameters for drag racing vehicles with 4-link rear suspensions.

Purpose: It helps racers optimize their suspension setup for maximum traction and weight transfer during launch.

2. How Does the Calculator Work?

The calculator determines two key parameters:

• Anti-Squat Percentage: Measures how much the suspension resists squat during acceleration
• Swing Arm Length: The effective length of the suspension's side-view swing arm

Explanation: The anti-squat percentage is calculated from the instant center location relative to the rear axle.

3. Importance of 4 Link Setup in Drag Racing

Details: Proper 4-link geometry is crucial for:

• Optimal weight transfer during launch
• Consistent traction
• Predictable handling characteristics
• Adjustability for different track conditions

4. Using the Calculator

Tips:

• Measure your vehicle's wheelbase (center of front axle to center of rear axle)
• Measure rear track width (distance between rear tire centers)
• Determine instant center location (intersection point of upper and lower link imaginary lines)
• Typical anti-squat values range from 70-120% for drag racing applications

5. Frequently Asked Questions (FAQ)

Q1: What is a good anti-squat percentage for drag racing?
A: Most drag cars work well with 90-110% anti-squat, but this depends on many factors including power level and tire grip.

Q2: How do I find my instant center location?
A: The instant center is where imaginary lines extending from your upper and lower control arms intersect in side view.

Q3: What affects anti-squat percentage?
A: Main factors are control arm angles, mounting points, and vehicle wheelbase.

Q4: How does swing arm length affect performance?
A: Longer swing arms generally provide more consistent traction but may reduce initial bite.

Q5: Should I adjust my 4-link for different tracks?
A: Yes, optimal settings often vary between well-prepped tracks and street surfaces.