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Stock JK TechBulletin board forum regarding issues with OE (original equipment) components of the Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) such as factory suspension parts, engine, transmission, body parts, interior fixtures and the on-board computer.
Mechanical fans rob hp. I have seen some people wire electric fans with a toggle switch and manually control them. That may be an option for you but you obviously would need to make sure it is turned on, and that just adds one more thing to worry about.
You could also keep the electric setup and just add an additional fan that is manually operated when you need it.
Mechanical fans rob hp. I have seen some people wire electric fans with a toggle switch and manually control them. That may be an option for you but you obviously would need to make sure it is turned on, and that just adds one more thing to worry about.
You could also keep the electric setup and just add an additional fan that is manually operated when you need it.
Anything belt driven by the motor creates resistance and takes power to turn. This is why many drag racers use electric fans. Although it is likely only a few hp.
...at the top of the graph. Normal driving, it's not noticeable; in my experience, anyway.
I totally agree. He asked pros and cons and that is about all I can think of besides taking up more room under the hood. I think I have read it is likely 3-5 hp. But definitely nice to have the constant airflow a mechanical fan especially off road.
If you setup an aftermarket fan controller and run a PWM fan it will run based on temperature rise not at one setpoint to come on. I wheel in 95F temps going slow and I have the Chev Camaro SS PWM fan. First time after the Chev conversion out wheeling I stopped and opened the hood on a hot day and the fan was spinning about 10% and just moving the air. Then on the downhills and cooler days it hardly runs at all. Then climbing low speed and crawling it gets to a pretty high rate as I can hear it. So best of both worlds here. And the V8 uses to stock 3.8 rad as well. Hope this helps in your decision. If you decide on something like this you can buy an inline tee that taps into the top hose and gives you a temperature port to sense from. See attached
Mechanical Fan vs. Electric Fan
