Originally Posted by
ny5speed Do you have the alternator underdriven at all? How high are you revving the motor?
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Not sure what you mean by 'underdriven'. We're basically always between the 3K and 6.5K RPM range, constantly.
Originally Posted by
nismo_star loose belt ... doubtful
too tight of belt ? excessive heat ? poor ground ?... possible
battery dead cell ? try different battery ? output is 8.5v ? what are you using to determine VDC ? Gauge or multimeter ?
alternator not providing enough amps for system, overload regulator til it burnt ?
Not a loose belt, checked that. Not too tight, checked that too.
Poor ground is possible, we noticed the ground wire has been making contact with the fan blade. Also, our clip that plugs into the alternator is somewhat melted and doesn't properly clip in, although we had that issue when we built the car.
Not a battery issue, because when we killed ours, we borrow other teams' batteries, and it ran those out of charge as well.
Yes, output drops to 8.5v, checked by multimeter.... actually checked by two multimeters.
How does one check the voltage regulator to see if it's functional?
Also, should mention that all three alternators were Duralast (Autozone), albeit their more expensive 'heavy duty' ones. Still rated for 80 amps though. I know their re-manufactured stuff is crap, but I don't think all three would be bad and go so fast.