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Pt_killa · 05-19-2016, 10:56 AM

Could it be that the amount of boost control from the tru-boost is slightly different between an internal gate and a dual port external wastegate? For an internal setup the controller just limits the air to the actuator to allow boost to rise while for an external setup the controller applies an offsetting amount of air to the top of the wastegate to control the boost, therefore the delta of the duty cycle and boost may be different for the two. Also, there is no extra pressure on the diaphragm while controlling boost on an internal gate but there is extra diaphragm stress on an external gate so maybe its a durability/safety thing?

05-19-2016, 10:56 AM	#8
Pt_killa Drives: Black 2010 Camaro V6 Join Date: Apr 2010 Location: VA Posts: 465 View My Garage	Could it be that the amount of boost control from the tru-boost is slightly different between an internal gate and a dual port external wastegate? For an internal setup the controller just limits the air to the actuator to allow boost to rise while for an external setup the controller applies an offsetting amount of air to the top of the wastegate to control the boost, therefore the delta of the duty cycle and boost may be different for the two. Also, there is no extra pressure on the diaphragm while controlling boost on an internal gate but there is extra diaphragm stress on an external gate so maybe its a durability/safety thing? __________________ (Sold Sept 2015) Stock 18" Heritage w/ BFG G-Force ZR tires / Blacked out bowties and tail lights / DIY Remote-Mount Turbo Kit (Precision 6776S .81ar ex. @ 6.5psi, Tial 38mm WG, Greddy Type-S BOV) / RX Catch Can / RX-FTI 3600 Stall / Blue Well Lights / Team LLT Last edited by Pt_killa; 05-19-2016 at 01:27 PM.