After a car is jumped when the battery won't start the car, what is actually running the car? Is it the alternator or the battery? This is also when the jumper cables have just been taken off, and the car is running under it's own power.
Just need to settle a debate with my friend.

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1984 Trans Am, Goodwrench 350, TES Headers, Performer RPM Intake, Flowmaster 80 Series, Holley 600 cfm & vacuum advance, and T5 with short shift

 

It's the alternator.
But be carefull although Ive never had a problem, if you jump a car or have a dead battery the alternator could go into wide open charge and burn out. Like I said Ive never had this problem but it could occur.
SSC

PS, you could remove one of the battery terminals and the car will run proving that the alternator is keeping it juiced up.


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85 Camaro, 355/400 "drag car" in moth ***** 13.1@ 101mph on its last season run.
Plans: Possibly add N20 for next season.
82 Firebird, 305/350 currently moth balled.
Current plans: Rebuild 305 with flat tops instead of the dished "cups" for pistons or slightly built 327 with the 58cc heads from the LG4, Upgrade the 2:73 to 3:73 or 3:42 and replace the turbo 350 with 700r4.


"Web site under construction"

G0D Bless.