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BOOST CONTROLLER, Explaining Turbocharger components

Time:2012-04-13 05:02Turbochargers information Click:

Tu Boost controller control

The Boost Controller

Dec 16, 2003 | By: Matyas Varga - SRO

It is important to note that stock systems with a wastegate actuator operated by means of boost pressure do not come equipped with a boost controller. When you have a boost pressure operated actuator, the actuator itself is the mechanism limiting your boost. In essence, the actuator opens your wastegate when boost levels reach the predetermined PSI level. Now in order to get more boost from your turbo system in this sort of set-up, you need to install a boost controller (bottom pic). A boost controller limits the amount of pressure that gets sent to the wastegate actuator. In a sense, it fools it to think that less boost is being created in the system. In turn, it will open the wastegate at higher levels of boost. On the other hand, we have a wastegate actuator operated by means of a solenoid. In this sort of set-up, the system is tied into your engine management system. Boost pressure is detected by an air flow sensor, this signal is then sent to your ECU and your ECU will regulate boost pressure accordingly. In such a set-up, you do no install a mechanical boost controller. In the latter case, people typically reprogram their engine management system to allow for more boost. A more intricate set-up will employ a boost controller which is electronically tied into your ECU. An example of this sort of set-up is the G-Reddy E-01 (top pic). This unit sells for about $500 and offers the option to adjust your turbo system to suit driving conditions. As for those of you with a conventional system, electronic boost control conversions are available


As appealing as an electronic interface may be, one should note that an ECU upgrade will typically conflict with a unit like the G-Reddy. You will have to chose which one you preffer. Mind you most ECU upgrades will come with preconfigured selecatable boost levels. In addition, they will also control all other vital engine parts such as fuel and ignition. However, the problem with boost controllers is that your engine was designed for only so much boost pressure. Altering factory settings will yield a shorter engine life. Furthermore, it will more then likely void your waranty. However, some engines have been tuned down. A prime example would be Volkswagens 1.8 turbo. This 20 valve engine was originally designed for Audi. The only difference is a smaller turbocharger and a different intake system. For this reason, an engine like the volkswagen 1.8T would be an ideal choice to increase boost. None the less, it is still important to realize that overall durability will be compromised

Further readings on this topic:

Conventional Boost Conroller

G-Reddy E-01 Electronic Boost Controller

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  • Forced Induction Basics
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  • The Blow Off Valve
  • The Wastegate

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