I'm running an electric fan from a 3.8L Furd Taurus. I'm also using the Delta Current Controller Keith9291 mentioned previously. The combo works wonderfully. I can have up to 3800cfm on full controller speed or 2600cfm drawing 15 amps. The fan usually runs very quietly but if it's a hot day in stop and go traffic the fan speed ramps up to whatever is required to keep things at the perfect temp.
