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Author Topic:   ALTERNATORS (yes,no,why)
posted September 23, 2003 12:21 PM
Why use alternators?

posted September 23, 2003 12:42 PM
I run without one w/ 355sbc & Hei. One less think to spin. Charged batt. before each race and no problems. Mud

posted September 23, 2003 01:47 PM
always ran with one.Like 15a says hei likes constant voltage.

posted September 23, 2003 03:09 PM
For an HEI to work properly above 5500rpm it needs at least 13v. A standard 12v battery is marginal even fully charged. Not saying it won't work, but I've heard to many people in the past complain of a miss above 5000 rpm. An alternator will maintain 14-14.3v.

That said, I just run a 16v battery. It can run up to 200 laps and still put out more voltage than a fully charged 12v battery. We've accidentally run ours for 3 weeks with only 20 minutes of charging. Never had any problems at all.

posted September 23, 2003 03:50 PM
I ran one last year and everyone tried to talk me out of it, gave in this year and had the batt. go flat twice, next year there will be an alt. on my car again

posted September 23, 2003 06:43 PM
I run one to put 2 belts to the water pump and fan. And one wire chevy alternators make life nice.

posted September 24, 2003 03:51 PM
When jump starting another car have you ever noticed an rpm drop on the jumping car when it started? Yes, that is a large current draw when it starts. However, there has to be some loss when it is charging. Not to mention the possibility of something else going wrong. I dont plan on ever using one. Instead, I will opt to the 16 volt bat or use 2 12 volt bats wired paralell and use the bats as weight ballasts.There are many pro's and con's. I would not advise using one just for the fact that it is something else that can go wrong during a race. It may be unlikely, but it is a possiblility.

posted September 25, 2003 01:54 AM
Ran a 1-wire my first year racin, none since then(12 years). Keep your battery charged, and use a good one. I run a locked distributor, a kick-azz starter, and maintain the electrical system constantly. In my opinion, the electrical system is the most overlooked of all racing systems. It's as important as your fuel system. Don't over-gap, either. Run 2 batteries if rules allow. One for ignition, one for starting.

posted September 25, 2003 01:19 PM
alternators are a no glory item because they come stock on every car. If no factory car had an alterntor and MSD sold it as a "belt driven ignition intensifier" it would be the hottest thing going. It is only a problem waiting to happen for someone who has it poorly installed, maintained or both!

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