I need to replace the 5 year old 12volt 40lb 800cca 115RC AC Delco battery group 34. My alternator outputs about 80 amps and won't charge the system at equilibrium with full accessories until about 1800rpm and that isnt fixable. I almost feel like I had a working system going, just the battery isnt deep cycle and its age. I'm looking for a good 12V battery for this application. And I'll bring a jump box to the track JIC. Not really considering 16v at this time. Besides needing a new charger, I HAVE READ that 16V should reduce voltage to the fuel pump (mines overkill now), Oxygen sensors, and possibly the Holley data dash. People I know charge the 16V between rounds anyway.