Normal battery voltage?
Thread Starter
Racer
Joined: Oct 2012
Posts: 458
Likes: 22
From: OK
Just took the vette out for a spin. Before the engine was started, the DIC read 11.3. Pushed the clutch, hit the button, and she cranked up as strong as usual. Voltage shot up from 11.3 to 14.5 instantly. I took a drive for about 10 miles. I shut it down for a few minutes, then went back out and shot this.
Melting Slicks
Joined: Oct 2008
Posts: 2,098
Likes: 8
From: Dayton Ohio
Thanks for posting that video. 
That pretty much confirms what I found. By the time you power up a C6 to read the DIC voltage, there is a significant draw on the battery from all the modules, lights, etc powering up. The battery voltage displayed when the car is not running is not really a static (no-load) voltage reading of the battery.
No doubt that if you left the car alone for an hour and came back and measured the voltage across the battery terminals (like this), you would probably see close to 12.6 volts.
That pretty much confirms what I found. By the time you power up a C6 to read the DIC voltage, there is a significant draw on the battery from all the modules, lights, etc powering up. The battery voltage displayed when the car is not running is not really a static (no-load) voltage reading of the battery.
No doubt that if you left the car alone for an hour and came back and measured the voltage across the battery terminals (like this), you would probably see close to 12.6 volts.
Team Owner
Joined: Sep 2000
Posts: 25,019
Likes: 2,714
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Well, the good news is that testing the battery under load is better than testing static.
If you learn what your normal voltage is in "run but don't start", especially after sitting overnight, then future comparisons should tell you when the battery is losing it's Wheaties.
If you learn what your normal voltage is in "run but don't start", especially after sitting overnight, then future comparisons should tell you when the battery is losing it's Wheaties.
Drifting
Joined: Jan 2003
Posts: 1,817
Likes: 5
From: Nevada
Walmart Everstart MAXX. Their Selection Number 16 (aka Group 47 or H5). Made by Johnson Controls. No hassle returns. No car dealer stories. No car dealer arithmetic. Open 24/7. Make sure that it fits you tray and venting requirements - GM used more than one style in the C6.
Burning Brakes
Joined: Mar 2008
Posts: 815
Likes: 1
From: Mesa "highlands" AZ
Good suggestion ^^^^^^
Unless it has changed, Consumer Reports rates the WalMart EVERSTART MAX as one of the best and a best buy.
Remember, the EverStart MAXX, because WalMart has 2 grades of batteries. The Maxx is the top model.
Unless it has changed, Consumer Reports rates the WalMart EVERSTART MAX as one of the best and a best buy.
Remember, the EverStart MAXX, because WalMart has 2 grades of batteries. The Maxx is the top model.
Advanced
Joined: Jun 2012
Posts: 52
Likes: 1
From: Castle Rock Wa
I plan on putting a Gel cell (optima type) in My C6 just in case.
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