I mainly do stop and go traffic so the vicious fan just works at idle (~600 rpm). I want to upgrade the cooling especially for better a/c performance.

Does this fan provide as much flow as the stock fan as lets say at 2000 rpm?

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1992 Mercedes 190D 2.5 turbo 5sp manual. EGT+boost gauges. Boost controller set to ~14.5 psi. 1 1/4 turns on full load adjustment. LPG injection. Next in the list is water injection.