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Message: <blockquote data-quote="DanPromote" data-source="post: 141174" data-attributes="member: 1834">Factory settings are often set to the safe level where air/fuel ratio are usually slighty rich and the ignition timing is retarded. With remapping/piggyback/standalone, they all have the same goal ie. to optimise your engine's performance. Depending on the ecu there are many parameters to set but the 2 main adjustments are the ignition timing and air/fuel ratio. By advancing the ignition timing and optimising air/fuel ratio alone you can notice approx 5% improvement even with stock engine setups. Of course, it is always recommended that you finish all your hardware mods (eg. exhaust, air filter, turbo/supercharger, stroker kit) before doing the remap or adding a piggyback/standalone as they can only optimise your engine's performance based on the modifications or existing hardware that you have. If you don't have a turbo or nos for eg, don't expect your car to get a 100hp improvement by doing the remap or adding piggyback/standalone, it can only improve based your current setup. Btw remapping and piggyback is not the same thing. Remapping uses your existing ecu and overides the current map with the new one much like a personal computer cpu bios flash (hence remapping) while piggyback is and add-on to your existing ecu. It may override certain functions and also have additional functions depending on its available functions.</blockquote>