Date: Sun, 04 Apr 1999 16:23:42 -0400
From: Patrick Valleau <>
Subject: Re: How's the APC work?

Trionic uses the boost modulator valve to bleed boost pressure away from the waste-gate to allow the boost to go higher. When it percieves pinging in the combustion chamber, the valve closes and directs more pressure to the waste-gate, thereby lowering the boost. Pat

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