What's your volt meter reading when cruising around town? Options

[raynekat]

Just curious what the typical volt meter reading is:

1) when you're sitting at the stoplight

2) cruising down the boulevard at 3-4000 rpm

Trying to see if I'm seeing typical or low readings
Thanks

I just recently noted a low charging issue that I believe came down to an alternator/voltage regulator mismatch.
I was using a Bosch VR with my Motorola alternator.
Now I've switched to a Marchal VR and the charging voltages look better.
About 13.75 volts while cruising.

[raynekat]

Here's what the "offending" battery looks like for those curious.
It's made by a company called Antigravity.
And this particular model, RS-30 with Restart, is no longer manufactured by them.
It's light weight....about 11.5 lbs and has a battery hold bracket available.
The bracket was slightly too wide to fit in the stock 914 battery tray, so I took it down to a local water jet company and had them carefully trim it to fit.
The bracket is aluminum.



A pic of the battery/bracket installed in the 914.



Unfortunately it will likely not be a great choice for more of a "daily" driver type of car.
For only the occasional Sunday drive (in nice weather), auto crossing or track days, I think this is a great option. It definitely starts up the car without any issues.

Scary part of the the Antigravity battery line-up is that the battery I had purchased was by far the battery with the largest amp-hr rating.
Most are much smaller than the 30 amp-hr the above battery has.
So they are indeed only "starter" batteries....for starting up your car and not much more.