Tuning tips: Progressive boost controllers.

[obi_waynne]

A boost controller will increase the amount of power you get from your turbo. The boost controller will alter the exhaust gases flow into the turbo allowing the turbo to spin at a faster rate. Standard boost control in most production cars can only be describes as crude. In order to keep costs down manufacturers [...]
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[MasterAuron]

It's not an archaic mechanical system of boost control if it's controlled by the ECU lol. It's the standard solenoids that are usually poo.