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Mount alternator on differential???

Discussion in 'The Hokey Ass Message Board' started by bibb86, Mar 31, 2009.

  1. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    i was thinking of mounting my alternator like this. what do ya'll think
     

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  2. EnglishBob
    Joined: Jan 19, 2008
    Posts: 1,029

    EnglishBob
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    Does the alternator going backwards when you reverse not affect anything electrically?
     
  3. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    shouldnt be a problem with direction. i only worry about high rpm.
     
  4. Tman
    Joined: Mar 2, 2001
    Posts: 34,154

    Tman
    ALLIANCE MEMBER

    I think we have about 6 threads about this already. Search
     

  5. How would the rearend see any higher RPMs than the motor?
     
  6. Tman
    Joined: Mar 2, 2001
    Posts: 34,154

    Tman
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  7. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    i did the search and cant find anything what do i search for. it would create higher rpms cause of the gears in the tranny.
     
  8. 4dFord/SC
    Joined: Sep 12, 2004
    Posts: 837

    4dFord/SC
    Member

    Maybe not a big problem, but it wouldn't charge at idle.
     
  9. I guess they work, because I've seen setups like that before. If the pulley is about the same size as a crank pulley, the rpms will be about right when it's in high gear cruising, but spinning pretty slow in lower gears.

    The big problem is that it's not charging when you're sitting there stuck in traffic. Better have a good battery and turn off all the accessories, because everything will be running off the battery whenever you're not moving along.
     
  10. AnimalAin
    Joined: Jul 20, 2002
    Posts: 3,417

    AnimalAin
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    Certainly possible, but can't imagine how it is better than driving it off of the crankshaft.
     
  11. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
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  12. Mr48chev
    Joined: Dec 28, 2007
    Posts: 29,180

    Mr48chev
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    No charge when the wheels aren't turning and very low charge at anything short of highway speeds.

    As someone else said there are several threads on this but I think it would still be better to tuck it down out of sight on the engine (maybe paint the case engine block color) and have a charging system that would keep the battery up. There are small case high output alternators around that should be easy to keep pretty well out of sight from the casual looker.
     
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  13. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    i would be doing it to get a clean look up front no other reason
     
  14. Pir8Darryl
    Joined: Jan 9, 2008
    Posts: 2,488

    Pir8Darryl
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    You didn't just really say that did you? :confused:
     
    LWEL9226 likes this.
  15. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    Overdrive gears- but I wouldn't worry about it unless you plan on running 6000 rpm in you overdrive gear
    the biggest problem is going to be if you get stuck in traffic at night. Also, if it's like my alternator, that doesn't energize until 2000 rpm, it may be a problem in stop and go traffic as well. It's been done, and there are threads on it already. go for a search!
     
    Last edited: Mar 31, 2009
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  16. Psychographic
    Joined: Mar 31, 2009
    Posts: 4

    Psychographic
    Member

    I have an 83 S-10 with hydraulic suspension, I used a setup like this to help keep my batteries charged. It worked fairly well, but I would'nt use it as the exclusive way to keep a charge for the car itself.
     
  17. Da Tinman
    Joined: Dec 29, 2005
    Posts: 4,226

    Da Tinman
    Member

    I'm going to do the same thing on the shoebox, no way I'm putting an alternator on the flatty.

    I cruised the car for 4 hours with the headlights on (in heavy traffic) before the battery gave up with no charging system at all. Genny failed and no time to fix it before the cruise started.

    Had a spare bat with us for when it quit.
     
  18. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    i was also thinking about running a stator off a motorcycle off of my water pump anyone had any experience on this
     
  19. oilslinger53
    Joined: Apr 17, 2007
    Posts: 2,500

    oilslinger53
    Member
    from covina CA

    Now that I haven't seen. That's an excellent idea.
     
  20. Doc.
    Joined: Jul 16, 2005
    Posts: 3,558

    Doc.
    Member Emeritus

    I run a setup like that on my '33. I run a second battery with an isolator in case I get stuck for a while in traffic. I've had no trouble with mine. It's not a daily driver though.

    Doc.
     
  21. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    i figure i will be running a few lights ignition and an electric fan and thats about it. and now days a new harley will even run HID headlights which use a ton on power so they should run my few electronics
     
  22. dalesnyder
    Joined: Feb 6, 2008
    Posts: 443

    dalesnyder
    Member

    HID headlitghts have a large draw to start the arc but after they light up they actually draw a lot less than regular lites.
     
  23. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    ohh ok i didnt know that.
     
  24. bibb86
    Joined: Mar 23, 2009
    Posts: 65

    bibb86
    Member

    any comments about the stator idea???
     
  25. ...
     
    Last edited: Apr 2, 2009
  26. stuart in mn
    Joined: Nov 22, 2007
    Posts: 1,941

    stuart in mn
    Member

    I recall seeing an ad in Street Rodder some years ago for an alternator that was built into the water pump pulley, it looked pretty similar to what you're proposing. I don't remember the name of the manufacturer, and for whatever reason it seemed like it disappeared from the market pretty quickly.
     
  27. Pir8Darryl
    Joined: Jan 9, 2008
    Posts: 2,488

    Pir8Darryl
    Member

    I'v owned a few motorcycles over the years, and hooking them up to the battery charger every weekend is SOP.

    I just cant imagine a [bike] system that's designed to run one headlight, one tail-light, and a starter smaller than an china-man's pecker on a 350cc motor is even going to begin to keep up with a car with A/C, electric fan, 500 watt stereo, 4 headlights, etc, etc, etc, etc.....
     
    chryslerfan55 likes this.
  28. Paulz
    Joined: Dec 30, 2018
    Posts: 58

    Paulz
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  29. gnichols
    Joined: Mar 6, 2008
    Posts: 10,974

    gnichols
    Member
    from Tampa, FL

    chryslerfan55 likes this.

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