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This means it offers no control over any of the other varying parameters that affect how your vehicle runs such as cam timing, fueling, rev limiters, and throttle response. A piggyback also acts as a boost controller and can control the actual boost levels sent to your engine’s turbo or supercharger.Ī piggyback is designed to offer only timing changes and offers no tuning capabilities. This allows the user to control the parameter being monitored (such as fuel levels).Ī map can then be loaded onto the device which tells it how exactly how much power should be added in whatever situation the user has set up. They are typically installed by connecting into factory or aftermarket wiring harnesses on each sensor they wish to monitor. What Is A Piggyback?Ī piggyback is an add-on device that intercepts communication between the factory ECU and other vehicle sensors. You can add multiple stages of boost, adjust your cam timing, run sequential setups, run piggyback CDI’s, and much more! An ECU flash is the closest you can get to professional tuning without taking your car apart. With an actual ECU Flash, you can adjust almost every single parameter that affects how your run. Most piggybacks are designed to work in conjunction with factory sensors and do not offer any tuning changes other than timing, rev limiters, fuel cut-off, etc. No “tuning” can hold a candle to the power and control that a programmer offers over your engine’s parameters. With an ECU flash, you will be getting all the features of a piggyback plus more! A fully tuned computer has many benefits. So, what exactly is an ECU flash? And how does it differ from a piggyback? Let’s find out! Shop All Tuning Systems and ECU Components Here What Is An ECU Flash?Īn ECU flash, or a full replacement tune, is a 100% raw replacement of your stock computer with a new tuned one. What’s the difference? Which one is better for your car? In this article, we will break it down for you and help you decide which type of tune is right for your vehicle. There is a lot of confusion between ECU flashes and piggybacks.