More pressure can reduce IDCs. But pressure is regulated by the fuel pressure regulator (yeah, duh) not the pump itself. The pump either can or cannot flow the volume required to maintain that pressure at max IDCs. If it can, then a bigger pump has no effect on your tuning, it's just a safeguard. If your pump can't flow enough to supply the fuel required at max power at the pressure that the regulator is trying to force, then upgrading your pump does make a difference.
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FWD is the new AWD
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