![]() ![]() The piggy back may be somewhat crude, and outdated from the aspect it was a way to change ECU signals before the ECU itself could be changed. It then tweaks the injector signals to provide a set air/fuel ratio based on exhaust gas readings. The power commander intercepts the signals from the factory (or modified) ECU to the injectors. A simplistic explanation is the reflash is like electrically changing the mechanical jets in a carburetor for fueling changes and the weights in a distributor the timing changes, among other things. The difference is that an ECU reflash alters the factory tables for engine management. Is your bike identical to the bike used for the tune installed by a particular company? No. do is shortcut individual bike dyno runns and flash with bike tunes from identical bikes set up in the past. Really, the best way to go is probably multiple ECU reflashes and dyno tunes. Sort of like a hybrid between ECU reflash and PCV piggy back. But I can make recordings with the log box, then when done riding, reflash the ECU based on the saved recordings. Having said that, I went with Woolich and the autotune, which is another option. Theoretically at least, the PCV can compensate if not perfect. ![]() ![]() The advantage to PCV is it can provide dynamic changes to engine management system (injector timing) that the ECU reflash cannot. ![]()
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