Quote:
Originally Posted by zenmaster
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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JB1 and SSTT increase boost only, allowing the stock ECU to make timing and fuel adjustments to compensate. JB2 adds an additional compensation for fuel, more than for which the stock ECU map is programmed.