Hi Norm
Using a Saab 2.3 turbo, its impellers are as per my maths. Lots of electrics to sort too, got to do boost fuel mapping and ignition retard too. Lots of stuff like blowoff valves, wastegates and boost controll, etc. Drawing it up this weekend. Send me your email, mines h2otreatment@xtra.co.nz will send pictures when its getting closer. Boost is good was $10K.

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