when i only had around 190-200 bhp to shoot with i ran without an alternator, but to be honest i'm really not sure the hassle of constantly changing and charging batteries was worth it, now i have an alternator i use a much smaller battery, so the cars no heavier, and with 350bhp to shoot with now the losses from the alternator is now only consuming 1.5% of my engines power, which you will struggle to notice and i now know if i spin out or stall my engine WILL definately restart, i once had a DNF due to a flat battery, the sickening thing was i was leading the race and would of stayed there until a voltdrop missfire started and got gradually worse and worse
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