This thread is about the Blaylock Switchblade turbocharger and its control actuation. The Switchblade is a variable aspect ratio turbo that uses a single aerofoil type vane to direct the flow of exhaust gas around the exducer wheel. I think the Switchblade is an interesting design because of its potential for use in gasoline engines without succumbing to problems associated with EGT and premature mechanical failure. The vane is made from inconel and there is only a single moving part in the vane assembly. This turbo is substantially lighter in weight than the Holset HE turbos (due to both a lighter CHRA and exhaust housing) and does not require water cooling. To date, the compressor is based around a Borg Warner 63mm or 66mm wheel. It is currently an oil bearing turbo however plans are on the horizon for exploring ball bearing versions. Actuation of this turbo is done by means of the VGT turbo controller documented on this thread http://www.dsmtuners.com/forums/tur...351ve-controller-project-6.html#post153188812 Here is the unit on a Cummins 5.9L at Blaylock Turbo. This system will also be tested on a 2G. <iframe width="420" height="315" src="http://www.youtube.com/embed/Pc-XAi3ljgk" frameborder="0" allowfullscreen></iframe> The benefits of the vane and control are clear. The wheel accelerates much faster when the VG is active. The plot below shows two runs, one with and one without vane control. Both runs are from 0mph idle condition.