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Why are you hell bent on going with the AEM? What’s wrong with the Power FC? Unless you don’t have anyone good enough or without expertise tunning Power FC's on 1JZ applications then i would go with the AEM. Currently im running with the Power FC in my Soarer and couldn't be happier. My tuner is a mad bastard when tunning it and knows exactly what maps suit my need for huge horsepower figures.
Because the AEM is a much better tuning setup than the PowerFC for one thing. Integrated wideband utilization, boost comp tuning, tons of input and output channels that can be configured to run anything; superior datalogging, and its always being updated with new features. There's TONS of aftermarket for it to like special dashboards and output gauges. There's more support for it on the internet forums and more support for it here in the states.
It costs more but the PFC doesnt even begin to hold a candle to it.
