I have an openable grille block, controlled by a power lock motor:
The motor moves the sliding part ~10mm (0.4 inch), so the vertical slits are 1cm wide with 1cm between slits.
I remember a discussion here about making a slitted grille block such that at higher speeds the air goes over the slits, but can still enter at lower speeds, or when the fan turns on. Something about pressure, turbulence, Reynolds number, etc., but I have no idea how to go about calculating this.
So are my 1cm slits too narrow to allow air to enter when driving fast? At what speed would the air start go around my grille block instead of through it?
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
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[Old] Piwoslaw's Peugeot 307sw modding thread