![]() ![]() Newer flash systems basically “wipe out” the memory of the stock ECM and become married to the motorcycle. This method is somewhat crude and does not provide a reliable tune for changing ambient conditions like temperature, altitude, engine load, fuel, etc. Most other systems are called “post-fuel devices” and are basically signal modifiers that adjust spark and/or fuel injector pulse widths. ThunderMax differs from most other tuning systems and devices primarily because it is a complete performance Engine Control Module (ECM) which replaces the factory or stock module (therefore not limited by the stock ECM’s constraints). Which ThunderMax fits my year motorcycle and model? Most popular aftermarket exhausts include 18mm oxygen sensor bungs and many factory head pipes as well - see model fitment guide for exhaust details. The new 18mm wide-band oxygen sensors require compatible oxygen sensors bungs located in your exhaust systems’ head pipes. Installation is easy and can be done typically within a few hours and the user friendly TMax software is designed to get your initial basemap selected and bike running in no time. The integral ThunderMax AutoTune system combined with the other system design advantages helps provide a motorcycle with increased throttle response & torque, improved overall rideability & performance, and a smoother & cooler running engine. ![]() ThunderMax’s key performance advantage relies upon its proprietary AutoTune technology which utilizes 18mm Bosch wide-band oxygen sensor feedback to provide continuous AFR tuning corrections based upon riding conditions like temperature and altitude. The ThunderMax ECM replaces the stock module and helps “unlock” various performance advantages not possible by “Flash” systems and other post-fuel “piggy-back” tuning devices. ThunderMax is an industry award winning, performance engine management system for EFI equipped Harley Davidson models. ![]()
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