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Tonight post will be for "boost control" . Boost control in GTV V6 tb is managed by ignition control unit EZ212K using Pierburg solenoid valve, which directs air pressure signal from compressor housing to wastegate (to open it and reduce boost pressure) or intake before turbocharger (to add more air to intake => help turbo spin faster and to hold wastegate closed => rise boost pressure). I want to have more options for control over boost pressure and more than one boost settings . So I wanted something specially designed for that task - boost controller. There is two major type of boost controllers - manual and electronic. Manual is simple and cheap and don't need electricity to work . It is easy to adjust - you just have to turn one "bolt" clockwise or counter clockwise and make tests to the moment when you see maximum boost that you want on the gauge. There is also models that have two settings (Hi and Low boost for example) and you can change settings mechanically on them. Electronic boost controller on the other hand is more complicated to wire and set. Except supply and boost signal in some models it needs more signals. It have more boost control settings and 2 boost channels (some models even have more). I wanted electronic boost controller and I had no doubt about the model that have to be bought . And after searching for good deal I bought what I wanted - A'pexi AVC-R AVC-r picture 1 AVC-r picture 2 AVC-r picture 3 Apexi AVC-r official site I think that this is the best boost controller (and probably most complicated ) so it's ideal for my project . It has two boost settings/channels , but it also have off mode and then boost is controlled only by wastegate spring, so basically there is 3 settings . With It you can have: - different boost for different gear - 1st,2nd,3rd,4rt,5th - different boost set point for RMP range with 500 RPM increments - 2500,3000,3500,4000 ... - scramble boost - when it receive signal (from installed button or switch for that purpose) it set boost at desired level for selected setting/channel. and many more features to control and monitoring. For full use of its functions it needs: - power - ground - RPM or injector signal - TPS (throttle position sensor) signal - vehicle speed signal - scramble switch output if you want to use such - boost signal from its MAP sensor in the package And enough for that post .