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Originally Posted by Drifter To Be
hey
how do boost controller's work?
and are they even necessary??
i thought the stiffness of the spring in the wastegate affects how much boost you're running...??
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It does, but a boost controller(bc) sort of tricks the wastegate(wg). The bc builds up pressure before the wg even knows that it's there. It's kind of like taking a fire hose and connecting it to a garden hose. The connection between the fire hose and garden hose would be the bc. It is holding back the amount of water in the fire hose and only letting through the amount that can go through the garden hose. The end of the garden hose would be the wg. It's not exactly like this, because first off, the hose from the turbo to the bc is the same size as the hose from the bc to the wg, but you see my point. The bc holds, say 18psi, meanwhile it is letting air through to the wg so it is still bleeding off what it is set at, say 14psi.
I'm not doing a very good job of explaining this, but to say if they are necessary or not is up to you. If you don't plan on turning up whatever the boost is set at on your wg, then no they aren't. Most people do though so for most, they are a necessity.