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I agree .. Fans drop voltage and amperage quite a bit. I did find that my Alternator needed a GND cable added so that it performed better. I have a Powermaster 105amp (17294) alternator.. It's a 1 wire alternator which required 8gauge wire ground. The original install did not have a GND cable!
This made a huge difference under load... mine went from 14.2V at 900rpm down to 13.4V at my battery with Lights ON and Fans ON ... but still charging the battery!
May be wise to confirm you have a solid GND to chassis or block as insurance... just a thought.
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Many thanks,
Mark
Superformance: SPO2454 , Titanium w/Black Stripes
Engine: Roush 427SR w/770cfm 4-Barrel Holley
Transmission: Tremec TKO-600
Last edited by Moritz55; 07-18-2020 at 11:38 AM..
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