Your fuel injected Harley Davidson is equipped with an ECU (electronic control unit) that's programmed to deliver fuel to the motor based on an air/fuel ratio for a stock air filter and stock exhaust system. While the ECU can self-adjust for environmental factors such as temperature and altitude, it can't adjust for mechanical changes like adding performance parts. When you install a performance exhaust system, your airflow changes, so you need a fuel management system that adjusts your air/fuel ratio to match the changes. That fuel management system is Fuelpak. The perfect combination with your performance exhaust system.
As shown in the illustration, your stock air/fuel ratio runs just slightly lean, however, when you install an aftermarket exhaust, that ratio changes, becoming even leaner. The white dashed line reflects the baseline air/fuel ratio and where you want to be for optimum throttle response. Unlike other fuel management systems that can only add fuel, Fuelpak adds and takes away fuel, allowing for a more precise range of refinement in your air/fuel ratio. Designed and manufactured entirely in-house, our technical staff is constantly at work developing custom fuel maps for popular brands.
When our engineering staff designed Fuelpak, the focus was on making installation and use as simple as possible. Fuelpak plugs directly into the factory wiring harness and ECU using a t-tap and OEM style connectors to stay fastened securely to your bike. Fuelpak fits so discreetly that, with the exception of the improved throttle response and rideability, you won't even know it's there. And should you ever remove Fuelpak, your motorcycle will return to operating at it's original factory settings.
Once the Fuelpak is installed, locate your fuel map from the setting chart provided or look it up here. Next, wth the ignition turned on, enter the values for your specific map directly into Fuelpak and calibrate your TPS (throttle position sensor). Finally, shut off the ignition, put the cover back on and you're ready to ride. That's the beauty of Fuelpak, you don't need to use a computer or tune on a dyno because the settings you enter are the result of our extensive dyno and road testing to find the ideal fuel map for your Harley.
Look over some of our videos here to see just how easy it can be.