I am using an hks evc to control boost and have been for years.The car is pretty modified-vf-22 turbo,550cc inj.,up-pipe,turbo back exhaust,utec engine management,intake,front mount intercooler.
HKS boost control is" T ed" into the stock boost control to the wastegate. Everything is working properly and you want to change something that is not broken? Most of the time the boost control motor either bleed pressure off of the wastegate thus allowing more boost. Or higher priced HKS digital units replace the stock boost control completely. Kaboom! means to much boost and lots of white exhaust smoke
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