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TOPIC: 3788 alternator output

3788 alternator output 02 Oct 2017 15:52 #1

  • jim.sumi
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Does anyone know the output of alternators on a 2001- 3788 with 330s?

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1988- 3288, 1994- 3288, now 2001- 3788

3788 alternator output 02 Oct 2017 18:13 #2

  • Uncle Bob
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My guess? 55 amps.
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1989 26' then 1994 32' now 2001 39'

3788 alternator output 03 Oct 2017 01:05 #3

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Can anyone confirm that guess?

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1988- 3288, 1994- 3288, now 2001- 3788

3788 alternator output 03 Oct 2017 01:41 #4

  • WhiteRockMike
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I believe the 330's we had in our 4788 had alternators rated at 85 amps, however, they typically only put out about initially 55-60amps and then rapidly lower as voltage came up.
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Mike
"Allante" Rayburn 75
Previous: '97 4788

3788 alternator output 03 Oct 2017 02:14 #5

  • higgins_jr
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Jim, my original 370 alternators were rated at 105, per the Cummins Delco Remy label pic (if it will load - it won't). Not sure about any subsequent falloff if any. Hope it assists! If you need the pic with part # rating etc, send me a PM with your email address and I'll flick it to you.

Cheers
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John H
Brisbane QLD Aust
"Harbor-nating"

2000 - 4788/Cummins 370's
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