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Old 08-29-2007, 01:00 PM   #7
Scooby Guru
Member#: 7164
Join Date: Jun 2001
Location: Arizona Bay
2000 Miata LS
Evo Orange Mica (1/644)


MBC = Manual Boost Control: it bypasses the ECU's boost control, which can either be a very good thing or a very bad thing, depending on the tune and the self-control of the user.

MBCs and DPs are a big no-no on '04+ WRXs due to a delay in fueling when the car gets into boost (emissions control bullcrap). If you increase the boost or breathing of the engine without the ability to add more fuel quickly enough, you're going to have trouble.
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