ThunderMax EFI


Real Power, Real Performance. ThunderMax is the fastest Auto-Tuning system on the market for your Harley®.


ThunderMax® with AutoTune is the industry’s first and only stand-alone Performance EFI Engine Management System developed specifically to meet the tuning needs of Throttle-By-Wire H-D® motorcycle owners. This highly advanced tuning system allows the user to support a wide range of performance upgrades with ease. The all new ThunderMax® AutoTune TBW module includes all of the great performance enhancements that made the brand famous – with benefits you’ll notice immediately, including quicker throttle response, increased power and cooler operating temperatures. Improve the performance and fuel mileage of your H-D® motorcycle without compromising over-all power output! Make adjustments to your EFI system without a master’s degree in electronics and computers! The ThunderMax EFI System is purpose-built to deliver uncompromising performance, and you don’t have to be a rocket scientist to install it, program it or make adjustments. The ThunderMax with AutoTune is a Wide-Band, Closed-Loop system which means it continually and automatically adjusts your air-fuel ratios every time you ride, regardless of changes in ambient conditions. All you have to do is ride and enjoy! The ThunderMax System can never be out grown... Change pipes, add cams, whatever! Just download a new map. ThunderMax software, firmware and map updates are accessible 24/7 with an internet connection.


Here it goes with the report of the Bike Week 2018. Take a look at this. This is Thunder Max. Many people play their powerful Harley-Davidson and their powerful V-Twins right before the showcase and tune them, by installing all kinds of great components. We will also tell you a little bit about some of these components. Jake from Thunder Max is a guest to me. Jake, thank you very much. I see that you have all kinds of extras to quickly bring V-Twins to Fordermann. We have that. Yes, our main eye is on our Auto-Tuning ECMs for Harley's with power injection. They provide more PS, torque, a lower power cons How does Auto-Tuning work? I have heard from someone that you no longer need a test stand for these bikes. Yes, so no more testing is needed. Every time you get on the bike, you are the test stand. We use wide band lambda sondens that continuously measure and analyze the air-power ratio of the bike. Very cool.

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