Open exhaust will simply show if the turbo has issues to begin with or if an older turbos is starting to show the signs. It can be said so much easier but I know you are just regurgitating your conversation with Jim. Good stuff.
fwiw, I never said you pulled it out of thin air. In fact, I've said we already knew about this. It was the grandstanding as the father of this new discovery that got you lit up but maybe that wasn't intentional. People DID flock to you after all...
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