RC ESC Softening Value Explained
What Is Softening Value?
Softening Value is an ESC setting that reduces the aggressiveness of throttle response during initial acceleration. Instead of delivering full requested power instantly, the ESC gradually ramps power in over a short period of time.
Think of Softening Value as a throttle smoothing filter. The ESC still reaches the requested throttle output, but it delays the power delivery slightly to make acceleration more controllable.
On many racing ESCs, Softening Value is measured as a numerical value or percentage:
• Lower values = More aggressive throttle response
• Higher values = Softer throttle response
• Zero or Off = No throttle softening
• Maximum values = Very smooth and gradual acceleration
The exact implementation varies by manufacturer, but the goal remains the same: improve vehicle control by reducing sudden power delivery.
How Does Softening Value Affect Your Car?
Softening Value directly affects how your vehicle responds when throttle is applied.
Higher Softening Value
Increasing Softening Value creates:
• Smoother acceleration
• Reduced wheel spin
• Easier throttle control
• Better traction on slippery surfaces
• More forgiving handling
Drivers often describe the vehicle as:
• Smoother
• More predictable
• Easier to drive consistently
However, excessive Softening Value may:
• Reduce acceleration feel
• Make the car feel sluggish
• Delay throttle response
• Reduce punch exiting corners
Lower Softening Value
Reducing Softening Value creates:
• Faster throttle response
• More immediate acceleration
• Increased punch
• Stronger corner exits
• More aggressive vehicle behavior
Benefits include:
• Faster response to throttle inputs
• Better performance on high-grip tracks
• More aggressive driving characteristics
Potential drawbacks include:
• Increased wheel spin
• More difficult throttle control
• Greater chance of traction rolling
• Reduced consistency on low-grip surfaces
Basic Softening Value vs Advanced Settings
Many newer ESCs offer multiple settings that influence acceleration. Understanding where Softening Value fits can prevent confusion.
| Setting | Primary Purpose |
|---|---|
| Softening Value | Smooths throttle response |
| Punch Control | Limits initial acceleration force |
| Drive frequency | Changes motor feel and smoothness |
| Power Curve | Adjusts throttle progression |
| Initial Throttle Force | Controls launch aggressiveness |
| Turbo Timing | Increase power at higher RPM |
Basic Adjustment
For most drivers:
• Increase Softening Value if the car feels difficult to control.
• Decrease Softening Value if acceleration feels lazy.
Advanced Adjustment
Experienced racers often use Softening Value to:
• Improve traction on dusty tracks
• Calm aggressive modified motors
• Make high-power setups easier to drive
• Increase consistency during long races
• Fine-tune corner exit behavior
Rather than chasing maximum acceleration, many top racers focus on creating a car that is easier to drive consistently over an entire race.
How Do You Change Softening Value?
The process depends on your ESC manufacturer. Common adjustment methods include:
ESC Programming Box
Many racing ESCs allow Softening Value changes through:
• Programming cards
• LCD programming boxes
• Handheld programmers
ESC Mobile App
Bluetooth-enabled ESCs may allow adjustment through:
• Smartphone applications
• Wireless programming modules
Computer Software
Some ESC manufacturers provide:
• USB programming interfaces
• Desktop software configuration tools
Recommended Starting Point
If your ESC uses a scale from 0–30:
• 0–5 = Aggressive
• 6–15 = Moderate
• 16–30 = Very smooth
Always consult your ESC manual because scale values vary between manufacturers.
When To Change Softening Value
Increase Softening Value When:
The Car Spins Tires Easily
If wheel spin occurs exiting corners, additional Softening Value can help maintain traction.
The Track Has Low Grip
Dusty, loose, or slippery tracks often benefit from smoother power delivery.
Using High-Power Motors
Modified brushless motors can produce aggressive acceleration that becomes difficult to control. Increasing Softening Value can make power more manageable.
Learning a New Track
A slightly softer setup often improves consistency while learning racing lines.
Racing Long Main Events
Reducing driver mistakes is often more important than maximizing acceleration.
Decrease Softening Value When:
The Track Has High Grip
High-traction surfaces can usually handle more aggressive power delivery.
The Car Feels Sluggish
If acceleration lacks punch, Softening Value may be set too high.
You Need More Corner Exit Speed
Reducing Softening Value can improve acceleration off corners.
Fine-Tuning for Maximum Performance
Advanced racers often lower Softening Value gradually until traction becomes a problem.
What to Check After Adjusting Softening Value
After making changes, test the vehicle carefully.
Corner Exit Performance
Watch for:
• Wheel spin
• Rear-end instability
• Loss of traction
The goal is controlled acceleration.
Lap Consistency
A car that feels slightly slower may actually produce faster lap times if it is easier to drive consistently.
Motor Temperature
Softening Value generally has little effect on temperatures, but any major setup change should be followed by temperature checks.
Monitor:
• Motor temperature
• ESC temperature
• Battery temperature
Throttle Feel
Pay attention to:
• Initial acceleration
• Mid-corner throttle application
• Corner exit behavior
• Straight-line acceleration
The vehicle should feel predictable without becoming sluggish.
Driver Confidence
One of the biggest indicators of proper Softening Value is confidence. If you can apply throttle earlier and more consistently, the adjustment is likely helping.
Softening Value Tuning Tips
Low-Grip Tracks
• Increase Softening Value
• Focus on traction and consistency
High-Grip Tracks
• Reduce Softening Value
• Maximize acceleration
Modified Racing
• Often benefits from moderate Softening Value
• Helps control aggressive power delivery
Stock Racing
• Usually requires less Softening Value
• Focus on maintaining maximum acceleration
Off-Road Racing
• Moderate Softening Value can improve traction on loose surfaces
On-Road Racing
• Lower values are often preferred on high-grip asphalt and carpet
FAQ
Q: Does Softening Value reduce top speed?
A: No. Softening Value primarily affects acceleration and throttle response. Top speed is generally unchanged.
Q: Is Softening Value the same as Punch Control?
A: No. Punch Control limits acceleration force, while Softening Value smooths how power is delivered. The two settings often work together but serve different purposes.
Q: Does Softening Value affect braking?
A: No. Softening Value mainly affects throttle application and acceleration behavior.
Q: Should beginners use higher Softening Value settings?
A: If it’s an option, then yes. A higher Softening Value can make powerful vehicles easier to control and more forgiving to drive.
Q: Does Softening Value improve traction?
A: In many situations, yes. Smoother power delivery can reduce wheel spin and improve grip, especially on low-traction surfaces.
Q: Can Softening Value make a car slower?
A: If set excessively high, acceleration may become too soft and reduce performance. The goal is finding the balance between traction and responsiveness.
Q: Should I use different Softening Value settings for different tracks?
A: Absolutely. Track grip levels, vehicle type, motor power and driving style all influence the ideal Softening Value setting.
Back to the RC ESC Settings Guide.
