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  1. #1
    Norwegian Wiking Trond's Avatar
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    How many amps is the alternator putting out?

    How many amps is the alternator putting out?
    I want to ventilate the engine compartment with a SPAL-fan... But dont know how big fan I can use.
    Will a constant 8-9amps "choke" the alternator?


  2. #2
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    I vaguely remember reading the charge is about 400-600 watts, I can't remember to be sure though! Hopefully someone will know!

  3. #3
    Quote Originally Posted by lolzer View Post
    I vaguely remember reading the charge is about 400-600 watts, I can't remember to be sure though! Hopefully someone will know!
    360 watts

  4. #4

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    Quote Originally Posted by Trond View Post
    How many amps is the alternator putting out?
    I want to ventilate the engine compartment with a SPAL-fan... But dont know how big fan I can use.
    Will a constant 8-9amps "choke" the alternator?
    Crap Trond, the big 4" Attwood #1749 I'm putting in draws only 2.9A... might be something to think about. 230CFM, water resistant, and only $25!
    I think you want to suck the hot air out, not just blow it around in there with a SPAL.

  5. #5
    Norwegian Wiking Trond's Avatar
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    The SPAL pushes 970cfm but draws 9-11amps.
    The fan will push air straight at the air-intake and keep the area around the intake cold.
    There is a lot of places the hot air will be pushed out, I just need to get the air moving.
    I mainly need this fan when I'm driving slowly, because at speed I have two ram-air intakes who takes care of the circulation. But if there is power enough to let the fan run all the time, why not let it run?
    The fan is $95 on ebay...

    So do you guys think there's enough power left in the alternator to run the fan constantly?

  6. #6
    dduck dduck1628's Avatar
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    360Watts / 13.5 volts = 26.6 amps

  7. #7
    Keep in mind that 26.6 amps is at 8K RPM. At slower speeds these things don't put out very much, and what is produced just keeps up with the current draw of the ski.

    So it depends on your riding profile. If you are running WFO all the time, you have enough spare power to run that fan. But if you only do WFO in small bursts, the ski doesn't have enough power to run that fan and keep the battery up.

    You could put a switch on it and only run it when really need it...

  8. #8
    Norwegian Wiking Trond's Avatar
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    It will be controlled by a switch on the steering-wheel... will use the fan only when I need it.

  9. #9
    Quote Originally Posted by Trond View Post
    It will be controlled by a switch on the steering-wheel... will use the fan only when I need it.
    Then I wouldn't worry about it. It should work fine.

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