What sort of cfm does the mechanical fan flow at ~4000-4500 rpm? Can that flow be matched from an electrical fan so that maximum cooling can be had from idle?

If I'd start worrying that I'd get stuck in the middle of the desert light years from civilization I wouldn't go there in the first place.

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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.