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tru boost question


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I need to find the happy spot for my tru boost. right now im' stage 2 and i'm running 18psi at wot. I noticed my wastegate flutters alot. My spring pressure is set at 7. and my duty is set at 70. Anyone know what the recommended spring pressure is for our cars? Internal wastegate BTW
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"Spring pressure" setting on the Tru Boost isn't really spring pressure. It's the pressure at which the wastegate opens. They used to call it something different on early versions of the Tru Boost.


Have you looked at AEM's videos for adjusting the Tru Boost? [ame=http://www.youtube.com/watch?v=_iZBlFkasGE]YouTube- Tru-Boost Gauge-Type Controller 2 of 4[/ame]

[ame=http://www.youtube.com/watch?v=aDzx2oW0cak&feature=related]YouTube- Tru-Boost Gauge-Type Controller 3 of 4[/ame]


When I tune the Tru Boost (on other applications, I've never used it on a Subaru nor have I needed to) I raise the duty and "spring" settings in alternating fashion. So I raise the duty and then I raise the "spring" setting a little at a time. The "spring" setting has a big effect on how fast the turbo spools.


Still, the Tru Boost really isn't that great of a boost controller unless you really like the gauge design. It is an open-loop controller with no proportional or integral gain capability, no air temperature correction, nothing. Even among other external controllers it's one of the cheapest around. It does use a 3 port solenoid which a lot of people do like.

On the search for a new DD...
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