Hello!
Switch should trip at 1.15 bar or so. I assume trip boost will vary according to age and switch tolerances. Switch will effectivly disconnect when trip boost is reached and it will shut both fuel pumps.
I recomend to leave the switch in the loop as it's your only safeguard should wastegate pressure line or membrane develop a leak. I sure tripped mine before I found out my membrane was shot.
Also if BOV is not working correctly, switch might trip inadvertly during shifts as boost will spike when you lift off the throttle.
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Thank you for your time,
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