Fan speed

[Atommik]

Hey all,

I'm using a Mercedes Benz electric cooling fan on my 51, S-10 swap. I've got a 327 SBC for power. The fan is on a thermostat type switch, on at 185 degrees off at 180. My trucks runs at about 185-190 degrees most of the time so the fan runs most of the time. It works great, but it is loud. I'm thinking about putting a resistor in line to the fan motor to slow it down and hopefully quiet it down. I'm electronically challenged, what type/ size resistor do I need. How many OHMS/ WATTS etc. Thanks for any help!