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Old 11-12-2012, 11:58 PM   #1
Scooby Newbie
Member#: 278236
Join Date: Mar 2011
Chapter/Region: International
Location: The dirty south
'06 sti
varies with the seasons

Default Can I lower boost with a MBC?

I have an 06 STI that I bought modded from the previous owner. It is currently tuned to 21 psi and uses a MBC for boost control. My question is, is it safe to turn the boost down to say about 18 psi by adjusting the MBC, or would I also need to get the car tuned again since the current tune is set to 21 psi?
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