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Although we didn't expect the curve to change much, we used our new fuel-pressure regulator to adjust the WOT air/fuel, since it was showing a bit lean on the readout. We took the idle reading from 43 psi up to 48, then made another pull while watching the gauge. The pressure maintained, and the air/fuel came from 13.3 to 12.1, right where we wanted it. Power, however, was unaffected.