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Are any of you using a Unichip piggy back ECU, I have a 2004 South African 1.8 QG18 Almera sedan and have fitted one with very good results. Not sure if the Almera ECU is the same as in the US Sentra but it is one of the new Hitachi units. The Unichip can adjust the fuel & timing as well as drive an extra set of injectors if you want to fit a Turbo, you can also drive a shift light. We have fitted it to a 350Z as well and have easily been able to find more power when running a straight through exhaust. When adjusting timing on the 350Z the VVT angle also changed a bit due to the ECU being fooled into thinking the TDC point had moved but it had very little affect. Its an excellent mod, & when I sell my car I can just remove it & fit it to my new vehicle, my fuel consumption has been improved by running slightly leaner on part throttle and my full load power figures are much better being optimised at about 13:1 fuel ratio.
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