Remapping wouldn't work simply as the standard ECU isn't
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(yet) remappable.
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Piggy backs? In my opinion, no, utter garbage.
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If you want to alter the mapping, get a proper stand alone such as a PFC etc.
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As for not using a boost controller on a standard turbo? Whoever told you the car only lasted 6 miles must have done a pretty bad job of installing/setting up the boost controller.
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Set properly they're fine, to a point.
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You have to realise that increasing an engines power is ALWAYS going to affect reliability to some extent, at some point.
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It might last 50,000 miles without a hitch, it might not.
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It's the risk you take.
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As for hitting 300 bhp on a side mount, it's very possible, several members have done so.
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It's also car/engine dependant.
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Some stock cars will make strong power, some wont so based on that some will only need a small boost increase and some breathing mods and some will fall short with the above mods.
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