I've recently added a Dual port (30% Atmosphere, 70% Diverter) valve to my GTI and now I want to understand how to get the most out of it.
Can someone please explain to me when the diverter is under pressure and how to best calibrate it.
If I have the spring control set to stiff, I can get a fluttering sound when backing off after the turbo has started to spool.
I thought I understood, but the more I read, the more mixed opinions if tthe flutter is normal or dangerous to the turbo.
Thanks...
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