Need a Huge alternator - Dodge Cummins Diesel Forum

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post #1 of 4 (permalink) Old 02-12-2011, 09:12 AM Thread Starter
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Need a Huge alternator

Alternator is dying. Last night in the middle of the night the alternator gauge dropped to 11V. Since we use a truck camper that has another 2 batteries that need to charged by the alternator while driving we will like to upgrade the 136amps stock alternator with a may be 200 amps?
Where can we get one? How good are the warranties? Or should we just go with the 136amps Bosch from Napa Lifetime Warranty?
We are in NC and we need it to make it home (FL about 600miles away) . Will we make it running during the day not using any power than driving?
PLEASE HELP FROM ALL THE GURUS!!


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post #2 of 4 (permalink) Old 02-12-2011, 09:40 AM
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Quote:
Originally Posted by Quest View Post
Alternator is dying. Last night in the middle of the night the alternator gauge dropped to 11V. Since we use a truck camper that has another 2 batteries that need to charged by the alternator while driving we will like to upgrade the 136amps stock alternator with a may be 200 amps?
Where can we get one? How good are the warranties? Or should we just go with the 136amps Bosch from Napa Lifetime Warranty?
We are in NC and we need it to make it home (FL about 600miles away) . Will we make it running during the day not using any power than driving?
PLEASE HELP FROM ALL THE GURUS!!
https://www.dcpowerinc.com/fit/2007~...35-270-xp.html
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post #3 of 4 (permalink) Old 02-12-2011, 11:54 AM
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Get a 220 Amp off a 45/5500. Denso #421000-7001; Dodge# 4801313AC. Direct bolt in from what I understand, and cheaper than aftermarket.

As far as making it home goes, sounds like you're deep cycling the camper batts, the alternator is going to full output (or close to it) and running that way long enough to get it hot hot hot while it's trying to recharge them. If you do replace the stocker with another 136A, you should be fine just driving home, I'd estimate the max amperage needed by just the truck to be about 70-75% of the stock alt.'s output.

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Last edited by lmeyer9916; 02-12-2011 at 12:02 PM.
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post #4 of 4 (permalink) Old 02-12-2011, 06:58 PM
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You may also consider running a heavier wire back to the trailer connection. A thicker gauge will transfer electricity much more efficiently. The stock wire is a pretty small gauge. on another forum I saw suggestions to use weld cable from the front of the truck to the trailer wire connector to minimize electrical losses.

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Last edited by Kokalit; 02-12-2011 at 06:59 PM. Reason: corrected some grammer.
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