Re:Excuse My ignorace. (Score 2, Interesting)

A piggy back is not a ECU. They do significantly less than a real ecu (which is why that piggy back cost you ~$300 while a AEM engine management will run you ~1500), all the piggyback is doing is altering the input from the engine's sensors(maf,o2,etc..) to make the real ecu make adjustments based on it's own algorithms and unless you had that piggyback dynotuned you are probably not helping your performance and possibly hurting it, because I am sure you could figure out in about an hour better air/fuel maps than those nissan engineers.