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How much HP does an average starter put out?

Discussion in 'The Hokey Ass Message Board' started by Pir8Darryl, Jun 2, 2008.

  1. Pir8Darryl
    Joined: Jan 9, 2008
    Posts: 2,495


    I know you guys could answer this question for me.

    Aproximately, how much HP/TQ does an average starter produce?
  2. Pir8Darryl
    Joined: Jan 9, 2008
    Posts: 2,495





  3. Magnus
    Joined: Apr 30, 2006
    Posts: 886

    from Sweden

    0.8-1.2 as i recall.
  4. Enough to move the car a ways. How much torque does it take to overcome the typical rolling resistance?
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  5. Topless Ford
    Joined: Feb 10, 2007
    Posts: 560

    Topless Ford

    I don't know but it was enough to pull my jeep out of the big puddle that killed the ignition.
  6. sliderule67
    Joined: Nov 4, 2005
    Posts: 367

    from Houston


    HP= (Volts x Amps)/746.

    I'm sure the amps (guess #1; 150??) required depend on the temp of the motor/oil, and I would derate the volts to 10 or less (guess #2) because of drop during high load. Gives you a number around 2 HP if the amps guess is close; otherwise adjust accordingly.


    HP= (Torque X RPM)/63000. So Torque = (HP x 63000)/RPM.

    ........Torque is in inch-pounds for these equations, and RPM is the starter RPM. Hafta (guess #3) that one, too.

    But I ain't no 'lectrical injuneer. Just a simple old gear head trying to make his way in an electronic world.
  7. I had worked for a well known aftermarket motorcycle starter company a while back. We actually modified Nippondenso forklift truck starters for Harley applications. Our starters were rated by kilowatts.We offered 1.4 to 2.0kw., which translates to approx. 1.3-1.9 horsepower. Frank

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