[FED 387]

If you use 2 12 volt batteries you can wire the car so that the starter gets hit with 24 volts and the rest of the electrical system is ONLY 12 volts------Ever listen to Greg Andersons Pro car when he hits the starter ??? Cranks probably at 500 RPM(LOL)- It starts RIGHT NOW !!!!Most pick up truck diesels use 24 Volts to start while the rest of the electrical system remains 12 volts ---- You don't need the weight of 2 big 16 volt batteries or even 2 "large" 12 volt batteries to accomplish this if you do it this way---FED 387