electronic wastegate

[C. Ludwig]

There is a thread on efi101 talking about this. In short, there really aren't components available to do what you're suggesting that will stand up to the heat very well.

The closest you'll get to what your suggesting, that is currently available, is a variable geometry hotside. That would actually have all the benefits of what you're suggesting as well as improved spool characteristics.

[RETed]

Heat + electronics = FAIL

On top of that, why even bother with PWM control?
Current mechanical WG + EBC = PWM control.
I'd rather go stepper motor control if you can get the electronics to hold up to the heat...


-Ted

[Pete_89T2]

Originally Posted by RETed

Heat + electronics = FAIL

On top of that, why even bother with PWM control?
Current mechanical WG + EBC = PWM control.
I'd rather go stepper motor control if you can get the electronics to hold up to the heat...


-Ted

True WRT heat + electronics = failure, but there's no reason that you would have to mount any of the electronics near the turbo, and if concerned about the solenoid or stepper motor WG actuator, those too can be mounted remotely in a more benign location via some type of cable or rod linkage.

As the OP suggested, a completely electronic WG control & actuation function would allow you to bypass the turbo on demand, like running in "N/A only" mode for economy. In a mechanical WG + EBC = PWM control setup, you still can can't limit boost below the WG spring tension. Of course your right foot can keep you out of boost just as effectively, but that's no fun.