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      11-04-2012, 03:18 PM   #11
Drives: 335i
Join Date: Mar 2011
Location: My car is my home

Posts: 2,016
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Think of it like a hairdryer, theres a low setting an a high setting, you control this through the buttons(electronically).
Well the turbos are the same way, through ecu tuning you can allow them to produce more boost( blow more air).
Where the hairdryer uses more electricity on the high setting to produce more air, the n54 will send more exhaust gases into the turbos to spin them faster and produce more boost.
Hope that helps a bit, theres more to it but that should give you an idea.
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