I have a twin turbo 2.0L engine from Japan. Does anyone have a schematic for the vacuum and pressure switches for the sequential turbos? I am going to put this engine in an off-road sand buggy. I understand the basic idea of what Subaru was doing, but do not know exactly how and when they opened the different valves to let the second turbo cut in.

I have a twin turbo 2.0L engine from Japan. Does anyone have a schematic for the vacuum and pressure switches for the sequential turbos? I am going to put this engine in an off-road sand buggy. I understand the basic idea of what Subaru was doing, but do not know exactly how and when they opened the different valves to let the second turbo cut in.

 

As far as I know there is a low spot between 3500 and 4000 when the low range turbo has maxed and the high range turbo is not fully wound up .Only speaking from hearsay.

Jude