Originally Posted by
PhilipA
The D2 EU3 wastegate modulator stops the valve to the wastegate from opening under 15PSI but from there on the valve is open and the physical wastegate diaphragm position and the flap position determines how much boost is available.
I understand from Offtrack that its operation is more complex than that but the net result is that the modulator stops wastegate "creep" at low boost levels and so increases boost at any position under about 15PSI compared with having no modulator like a Defender.
I have my screw adjustment wound up to about 9 turns and the boost transition is seamless up to 20PSI on my gauge positioned near the MAP sensor. Car is 2002 TD5 Auto EU3.
Regards Philip A
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