Performance Tuning for EFI Harley Davidson® Motorcycles

What is ThunderMax ECM?

ThunderMax ECM is a performance-enhancing engine control module (ECM) designed specifically for EFI-equipped Harley Davidson® motorcycles. This advanced, stand-alone tuning system delivers unmatched performance and rideability by utilizing proprietary AutoTune technology combined with wide-band oxygen sensors. Whether you’re looking to improve throttle response, fuel efficiency, or overall power, ThunderMax offers the perfect solution for Harley owners who want the best performance.

Key Features of ThunderMax ECM:

• Award-winning performance for Harley Davidson® motorcycles.
• Proprietary AutoTune technology for automatic real-time fueling adjustments.
• Wide-band oxygen sensors to monitor and optimize the air-fuel ratio.
• No wire cutting or splicing required for installation.
• Plug-and-play design—simple and quick setup.

ThunderMax ECM Installation: Fast and Easy Plug-and-Play Setup

ThunderMax ECM is 100% assembled and ready to install, meaning you can enhance your Harley’s performance without the need for complicated modifications. There is no wire cutting or splicing—simply replace the factory ECM and oxygen sensors, load a map, and enjoy the improved ride.

How to Install ThunderMax ECM:

1. Remove the factory ECM and oxygen sensors from your Harley Davidson®.
2. Install the ThunderMax ECM and wide-band oxygen sensors in place of the stock components.
3. Load a pre-configured map or customize it using ThunderMax software.
4. Start your bike and feel the difference in rideability, power, and performance.

This easy installation makes ThunderMax the perfect option for those who want to upgrade their Harley Davidson®with minimal effort.

AutoTune Technology: Real-Time Fueling Adjustments for Optimal Performance

One of the standout features of ThunderMax ECM is its integration of AutoTune technology. This technology uses wide-band oxygen sensors to automatically adjust fueling in real-time, providing a smoother, more responsive engine performance.

How ThunderMax AutoTune Works:

• Automatic fueling adjustments are made at every 256 RPM and 1.5-degree throttle increment for more precise control.
• Wide-band oxygen sensors continuously monitor and optimize the air-fuel ratio for peak engine efficiency.
• The built-in barometric sensor adjusts fueling based on ambient air conditions, ensuring your bike runs optimally regardless of altitude or weather changes.
• Real-time feedback means you don’t have to manually accept adjustments—the changes are written automatically once you turn off the bike.

Benefits of AutoTune Technology:

• Improved throttle response and acceleration.
• Smoother, more consistent engine performance.
• Optimized fuel efficiency for a better ride.
• No need to “accept” changes—everything is done automatically.

ThunderMax ECM Tuning Software: Full Customization at Your Fingertips

For those who want to take their tuning to the next level, ThunderMax ECM is fully adjustable using ThunderMax tuning software. The software allows you to fine-tune your motorcycle’s fueling, throttle response, and performance to match your specific needs.

Features of ThunderMax Tuning Software:

• Adjustable fueling settings for more precise control over engine performance.
• Real-time data feedback for more accurate tuning.
• Easy-to-use interface for both beginner and experienced riders.
• The ability to load a custom map or choose from pre-loaded base maps to optimize performance for different riding conditions.

ThunderMax gives you the flexibility to either go with a basic setup or fully customize your Harley Davidson® ECM to suit your personal preferences.

Why Choose ThunderMax ECM for Your Harley Davidson®?

ThunderMax ECM offers unparalleled performance improvements for EFI-equipped Harley Davidson® motorcycles. Whether you’re seeking smoother power delivery, enhanced throttle response, or improved fuel efficiency, ThunderMax delivers the best results. With its AutoTune technology, easy installation, and full adjustability, it is the ultimate tuning solution for any rider.

Benefits of ThunderMax ECM:

• Seamless integration with your Harley Davidson® bike.
• Improved performance with smoother acceleration and better power delivery.
• Automatic real-time adjustments for maximum efficiency and rideability.
• Simple installation with no wire cutting or splicing required.
• Customizable tuning options through ThunderMax software.

Upgrade Your Harley Davidson® with ThunderMax ECM Today

If you're looking to upgrade your Harley Davidson® with the latest in motorcycle performance technology, the ThunderMax ECM is the ideal choice. With its award-winning design, real-time AutoTune adjustments, and user-friendly installation, ThunderMax delivers the perfect balance of performance and convenience.

Ready to Maximize Your Harley's Performance?

Don’t wait—upgrade your Harley Davidson® ECM today with ThunderMax and experience smoother rides, better throttle response, and increased power. Whether you’re looking to enhance your daily ride or take your motorcycle to the next level, ThunderMax is the perfect tuning solution for any Harley rider.

Installation Instructions

Emissions Notice

This product is intended for "RACE READY" vehicles only and is not for sale or use on vehicles otherwise subject to emission control requirements.  In the state of California, this product should not be used on any vehicle that is registered for use on public roads. Please view the ThunderMax 50 application guide for "STREET APPROVED" & ARB compliant products.

Part Number: 309-485

Fitment:

Sportster models

2012–2013 Harley-Davidson XL1200V Seventy-Two
2011–2013 Harley-Davidson XL883L SuperLow
2011–2012 Harley-Davidson XR1200
2010–2013 Harley-Davidson XL1200X Forty-Eight
2010–2013 Harley-Davidson XL883N Iron 883
2010–2013 Harley-Davidson XL1200C Sportster 1200 Custom
2010–2012 Harley-Davidson XL1200N Sportster 1200 Nightster
2010–2012 Harley-Davidson XR1200X
2010 Harley-Davidson XR1200
2010 Harley-Davidson XL883L Sportster 883 Low
2009 Harley-Davidson XL1200R Sportster 1200 Roadster
2009 Harley-Davidson XR1200

Softail models

2009 Harley-Davidson FXSTSSE3 CVO Softail Springer
2008–2010 Harley-Davidson FXCWC Rocker C
2008–2009 Harley-Davidson FXCW Rocker

Dyna models

2008–2011 Harley-Davidson FXDF Fat Bob
2007–2011 Harley-Davidson FXDC Super Glide Custom
2007–2010 Harley-Davidson FXD Dyna Super Glide
2007–2009 Harley-Davidson FXDL Dyna Low Rider
2007–2008, 2010–2011 Harley-Davidson FXDWG Dyna Wide Glide
2006–2011 Harley-Davidson FXDB Street Bob
2005–2006 Harley-Davidson FXDCI Super Glide Custom
2004–2006 Harley-Davidson FXDI Dyna Super Glide
2004–2006 Harley-Davidson FXDWGI Dyna Wide Glide
2004–2005 Harley-Davidson FXDXI Dyna Super Glide Sport