Pavegeno928

I just purchased the alternator/battery monitor below. (http://equus.com/Product/3721). I leave it plugged in while driving to keep an eye on things.

I have an '88 911 with a one year old Paris alternator.

Trying to figure out what normal voltage readings I should be getting.

I get the following:

Key to on before starting - about 12.2V

Immediately after starting - about 13.95V

Loading up with headlights, a/c fans, and radio - about 12.8 V

Am I in the ballpark for a properly operating system?

Any help with what the specs are would be appreciated!

Thanks,

Gene

tbanasiak

Looks fine to me.

theiceman

That sounds right on the money. Mine sometimes run a at above 13 while running but sounds like you are in great shape

theiceman

P's you are nuts if you run our cars without using some real time voltage monitor. Just too many stories of cooking electrical systems.

Pavegeno928

Thanks everyone! Have thought about getting the tach modified by North Hollywood to include a voltmeter...

SiberianDVM

I just found out by playing with my new JVC KD-NX5000 NAV/radio/DVD that it has a nice voltage monitor built into it; 1 screen shows voltage, speed, compass, and time. On the way to work this morning, in the dark with headlamps on the voltage was reading 13.3v. NAV speedometer was showing 60mph while analog speedometer was showing 64mph.

theiceman

hey Pav if you do that let me know .. i have a spare tach i bought exactly for that reason . Curious as to how much they want.