Alt & Volts -A/C Question

[Cobra25]

I noticed the other day after my car warms up if I put my A/C on high with my car in park my Volts drop to 12.0 , If I have it in gear with my foot on the brake it's at 11.8 Volts. ( When its cold it doesnt do that ) ( When I start it up it charges at 13.8 Volts & driving down the road its normal no matter what I have on. ) MY question is what does you car due ?

[Rockettman]

It does the same.

Hot wires don't carry current as well as cold ones do. On a super hot day, you'll notice this much more. Every accessory you put on, takes away from the output of the alternator. With your foot on the gas, it speeds up the alternator, and gives it just that little extra-bit.
Nothing at all to be concerned with. NORMAL.

P.S. If it starts to stay around 8 - 10 or falls below and STAYS THERE - then you've got an issue.

[fastblackmerc]

It does the same.

Hot wires don't carry current as well as cold ones do. On a super hot day, you'll notice this much more. Every accessory you put on, takes away from the output of the alternator. With your foot on the gas, it speeds up the alternator, and gives it just that little extra-bit.
Nothing at all to be concerned with. NORMAL.

P.S. If it starts to stay around 8 - 10 or falls below and STAYS THERE - then you've got an issue.
+1.

You can also upgrade to a larger more finely stranded wire.

[Cobra25]

My concern is that this is the first time I noticed this, The Teck at Delray Ford Ford said the other day when I had a Wheel alignment done it was a little too low. The car has a Ported & polished Trilogy S/C and a built motor with large Comp cams in it. The guy who custom tuned my car said the volts at that point was too low for the tune & I noticed the car was running a little ruff that that point too.

[LANDY]

Dattalog it driving around and at wot then then read the logs thoroughly before spending money.

[Cobra25]

The Master Electricial Teck at Margate Ford said it shouldn't go below 12.8 Volts. I'm just trying to see what everyone's else's Marauder is doing so I have a better understand.