Petrol engine turbos with electronic wastegate actuators?

[Chris Wilson]

I am sure I read of a new range of petrol engine turbos, maybe from Borg Warner, that use solely electronic control of the internal wastegate flap valves. I am now doubting my sanity as I can't find the reference again. Has anyone any info on this, I have always thought some sort of direct acting servo motor with PID control from the ECU would be superior to pneumatic control indirectly altering the wastegate from the ecu via a boost control valve. Thanks.

[MarkMc]

I have seen them but the factory person I know is being very cagey about information. Would be a very cool way to go though.

I have a variable geometry motor from a Toyota Hilux turbo diesel here on my desk but it's broken. it would have done the same job.

[Chris Wilson]

A friend has put two Porsche 911 variable vane turbos on a Lexus V8 in a Supra, he got it running pretty well on a Syvecs ecu, but the turbine housings were really too small, so mega low end boost, but excess back pressure at the top end even with the vanes wide open. he was controlling boost from exhaust manifold pressure rather than intake pressure, I think. I'll post a link when I find it. I have asked this on another forum, (efi101) and few see any merit in electronic control and say it's overcomplicating things. I don't agree. I am looking at 4 port actuators or two 2 port ones to allow me to run soft springs in my integral gated Skyline turbos, but I need to change the actuators to dual port, and I am not convinced they'll be reliable. I have posted separately about these I think. Cheers Mark.

[MarkMc]

Over complicating....? I would disagree as well, all it takes is the software knowhow and it will make things infinitely better.....and maybe a working Hilux motor.