
Thread: Electric fans drop engine rpm
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07-13-2022 02:41 PM #1
Electric fans drop engine rpm
I just installed a new radiator with 2 14" fans. I used a relay to power up the fans. When the fans turn on, the motor rpm at idle drops like 150+ rpms. It appears to be a stock OEM alternator, brackets, and pulley. I'm guessing it was the stock 55 amp alternator. It's a slightly pumped up 350 and it idles a little lumpy but gets real rough when the fans turn on. It's got a pretty fresh Optima battery. Can the fans pull so much that the alternator struggles so much that it drags down the motor? Would a bigger alternator solve this?
thanks for any suggestions....
Ditto on the model kits! My best were lost when the Hobby Shop burned under suspicious circumstances....
How did you get hooked on cars?