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1.7 Bar?

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#41 james4563



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Posted 05 December 2017 - 10:59 AM

Is it normal that maximum pressure the actuator sees from the OEM boost controller is only about 12psi? This would mean that the wastegate would only open a few mm because my static break is 10psi.

Based on putting 12psi to the actuator with a pump, it's hardly opened at that point, no where near fully, probably not even half open. Is it normal for it to open so little for CS stage 4 map?

Any idea Steve?

#42 siztenboots



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Posted 05 December 2017 - 12:51 PM

As you can see from the pipework , the output of the compressor wheel feeds in to the 3 port solenoid , and this is pulsed to either give pressure to the actuator , or return to the input side of the compressor.

Fail safe you should see all pressure go to the actuator and open the wastegate.

The control of actuator movement, or duty cycle is determined by a lot of functions by the ecu.

#43 james4563



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Posted 06 December 2017 - 06:44 PM

Looking back at the Dyno graph that you posted a few pages back, I'm not surprised I'm getting lots of stalling. In 4th gear by 3000rpm I am making 23psi, compared to your Dyno at 3000rpm is just making 11 or 12psi. Unless the scale on the right isn't boost psi??

Edited by james4563, 06 December 2017 - 06:44 PM.

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