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      10-13-2007, 02:40 PM   #5
zenmaster
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Drives: '17 M2
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Quote:
Originally Posted by DBville View Post
MBCs or EBCs control boost only. JB (and others) supposedly control timing and fuel as well.
The JB2 goes to 11.5psi, about 3 psi over stock. The JB2 lets the stock map handle the timing and fuel for this up to a certain RPM. At that point, regardless of conditions, the JB2 makes the ECU think things are running lean, so ECU adds fuel.
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