harley performance tips

THE THROTTLE BODY Around The LEFT Is Definitely An AFTERMARKET PERFORMANCE THROTTLE BODY. The Main One Around The RIGHT Is Really A STOCK HARLEY-DAVIDSON THROTTLE BODY
Electronic Fuel Injected Engines
The Factory initially offered Electronic Fuel Injection (EFI) becoming an option in 1995, plus it ongoing to become a choice on various models until 2007. However, starting in 2008, EFI increased being standard on all purchases. Both Magneti-Marelli and Delphi EFI systems are actually used since 1995. Despite the fact that two systems differ in the way they work, they accomplish the identical thingand include similar components


Essentially, EFI is certainly an electronically controlled fuel delivery system. Basically, it truely does work digitally instead of analogically. Unlike a carbureted engine, where the cylinder's air/fuel mixture is metered robotically with jets and tuning is accomplished using exchangeable jets and simple screwdrivers, electronic fuel injected engines depend by having an Electronic Control Module (ECM) to search for the amount of fuel being provided as well as the exact moment in which the fuel will probably be launched to the intake tract. Consequently, the ECM ought to be recalibrated to produce tuning changes for nearly any changes made to the engine parts combination.Whereas a carbureted system uses gravity to provide gasoline within the vehicle's gas tank for the carburetor float bowl, EFI systems relies on a fuel pump, fuel filter, and fuel regulator to supply fuel in a great deal and pressure to electro-mechanical injectors set up in the intake manifold. To handle ventilation using the intake tract, a butterfly valve round the TB is mounted within the outboard finish in the intake tract. The TB only controls ventilation using the
position in the handlebar throttle while fuel is controlled having a
combination of the ECM as well as the fuel injectors.
Although a bigger carburetor and matching manifold are generally placed on a carbureted engine to improve air flow, within the
situation of the injected engine, a bigger TB can be used to improve air flow. One major impact on note, however, is the fact that a throttle body only flows air while fuel is provided downstream through the injectors. Just one benefit of the design is the fact that fuel has a shorter period to split up in the air within the induction tract. That may optimize the environmentOrenergy mixture while enhancing combustion.
Much like modifying a carbureted engine, modifying an EFI-based engine with less-limited intake and exhaust systems will need additional fuel, and growing displacement and compression will need additional fuel and ignition timing changes.
EFI systems allow fuel and ignition timing changes to make digitally, rather than robotically altering flying. For tuning EFI, two choices are available: A self-contained control unit needing no computer interface, or perhaps a computer-based software package that may customize the instructions saved within the stock ECM. The selfcontained non-computer interface models allow fuel flow to become rapidly modified on mildly modified engines. Software-based tuning systems tend to be more comprehensive and meant for both mildly and heavily modified EFI engines. Software systems allow both fuel flow and ignition timing changes to make towards the ECM's author. These methods are generally known to as changing the ECM's fuel map.