Originally Posted by AndyF
Originally Posted by ChrgrCuda


Following this thread as I also have a Holley Sniper and dual electric fans and I'm dropping below 12 volts at idle when the fans kick in with a 100 amp 1 wire alternator.


That doesn't surprise me. Check your alternator output with a clamp on ammeter and see what it is putting out at idle. I bet it isn't producing anything close to 100 amps at idle. Maybe only 20 or 30 amps. It isn't uncommon for one wire alternators to struggle at idle.

I have to get it up to about 1800 RPM's to get it back up 12.3 volts when the fans are running.

68 Cuda Notchback [Email]10.86@120[/Email] 69 Charger R/T 440/505 2009 Challenger SRT8