Quote:
Originally Posted by Phase
Ok I’ll probably block off the little lower opening. If it gets too hot the upper grill will open anyways ( that happened this summer driving thru Arizona mountains in black car)
I’m assuming no aero benefit though since it’s such a small area?
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That lower opening may constitute the actual forward stagnation point, and highest static pressure on the car.
If so, the actual air volume through there may be disproportionately high, considering its 'size.'
The upper grille may be exposed to accelerating ( pressure-reducing ) flow, as the Lanchester/Prandtl surface if discontinuity forms around the nose.
Just watch your temperature gauge.
Engine warmup has as much to do with the thermostat operation and internal plumbing, as it does with cooling air flow.