One of the many “tips” floating around for track vehicles is to rig a switch to activate the extra fan while the heater boxes bypass is open & flapper valve is closed. This provides additional air flow over, around & through the cylinders for hot days at the track.
Actually, most cars heater control lever should activate the fan before the heater box flappers open anyway. But not Carreras or cars equipped w/the auto temp control. So I got to ask; what price fashion, or better access to (?) or just because?
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