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Alternator question

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Lunchbox5k

Alternator question
« on: September 19, 2007, 02:56:22 PM »
I just wired up three sets of off road lights with a max 20 amps apiece. This is fine and dandy till somebody pointed out that I could over draw my alternator if it has too small of an output. Well turns out my 90 kick 2dr has a 55 amp alternator. Anybody got a clue on a conversion or changing out the guts of the factory unit to make it put out more power?
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Offline Mikerpm4x4

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Re: Alternator question
« Reply #1 on: September 19, 2007, 04:36:58 PM »
Planning on lighting up a football stadium? Why do you need so many lights? How long of a duty cycle are you planning and how many do you need to run at once? You may be able to just put a quality battery in like an optima if you only need to run full power for 1/2 hour or so. if your talking long term you could do a GM swap. I know there are kits out there but I dont know if they are much more amps.
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Offline ROSS

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Re: Alternator question
« Reply #2 on: September 19, 2007, 05:25:11 PM »
I run a 105 amp gm altand two optima batts
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Lunchbox5k

Re: Alternator question
« Reply #3 on: September 19, 2007, 09:46:57 PM »
heck ya  I'm going to light up a football field, if there is one thing I have learned is you can never have enough light when driving a trail at night, and dead batteries are not fun. Just would rather have too much than too little.
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MUD CHILD

Re: Alternator question
« Reply #4 on: September 19, 2007, 10:08:16 PM »
Quote from: ROSS on September 19, 2007, 05:25:11 PM
I run a 105 amp gm altand two optima batts

What is that alternator originally out of?
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Offline bentparts

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Re: Alternator question
« Reply #5 on: September 20, 2007, 03:56:13 AM »
Trail Tough sells a lower bracket that allows swapping to a larger GM alt. I don't have the part#, but mine is a 105 amp out of an older Suburban. You'll have to modify the top bracket to fit. I believe there is also a write up here on the forum somewhere about this, try the search.
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Offline geeeeoooo

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Re: Alternator question
« Reply #6 on: September 20, 2007, 05:07:41 AM »
i just upgraded my battery, thats all i needed to run 2 sets of foglights, and power my 1200 watt amp
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Offline ROSS

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Re: Alternator question
« Reply #7 on: September 20, 2007, 07:22:17 AM »
mine is out of a 97 to 02 buick
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ace69247no13

Re: Alternator question
« Reply #8 on: October 06, 2007, 01:54:47 AM »
Quote from: ROSS on September 20, 2007, 07:22:17 AM
mine is out of a 97 to 02 buick
how'd ya get that to work i was just gonna get the 78 to 85 gm and pick up a rebuild kit and take it up to 130amps.  but if i can get a newer alt to work. i have 2 that run 110amps from my camaro that has no motor at the moment.
« Last Edit: October 06, 2007, 01:56:20 AM by ace69247no13 »
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Offline ROSS

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Re: Alternator question
« Reply #9 on: October 06, 2007, 07:16:38 AM »
also got the plug from NAPA auto . made my new bottom bracket. wired in the new plug and modified the top bracket.  running all serpintine belts now.  works great
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87 SAMI 1600 FUEL INJ. , TORQUER CAM, 6.5 TO 1T-CASE, 5"SPRINGS SHACKLE REVERSE ,2 BODY LIFT, LOCK-RITES FRONT W/ HEAVY-DUTY AXLES & ARB'S REAR  BFG 31 X10.50 X 16",  EXO SKELLETON,
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ace69247no13

Re: Alternator question
« Reply #10 on: October 08, 2007, 08:57:00 PM »
wow cool i wonder if the only difference is the pulley.  If so i will get one of the alternators i have from my camaro if i need to i can change the pulley.  if not how hard was it to get pulleys to change over to serpantine???
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