Quote:
Originally Posted by tpatodd
Hi all-
First off... Happy New Year!
Car is running great. Even the battery when day driving.
This note is more-so out of curiosity. I rarely drive at night but recently I noticed that when I drive with my lights on the voltmeter drops quite significantly. Normal is 13-14v. Lights on drops it to 10v or less.
Even worse, lights on, fans on, drops it to 8-9v. 
Is this normal?
Battery is ~12months old (Duralast 26R-DL). Even when the voltmeter drops all seems well. The lights are not fading or flickering.
Again, not doing much night driving so was interested it what others experience.
Thanks!!
tpatodd |
Your Alternator may be undersized for the loads, also Roush uses underdrive pulley's so this maybe it as well.