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High Torque When Rebuild Starter?

Discussion in 'Early CJ5 and CJ6 Tech' started by mickeykelley, Dec 17, 2017.

  1. Dec 17, 2017
    mickeykelley

    mickeykelley Well-Known Member

    Republic of Texas
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    When getting the starter rebuilt, the guy asked if I wanted it converted to hi-torque for the same price. The engine is being rebuilt at the same time. I'm assuming it would crank the engine faster, but is that really necessary? This is on a stock F134 12 volt. Are there other pros and cons I need to consider? For those that have done it, were you happy or not really a thing?
     
  2. Dec 17, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Does that mean it would draw more amps?
    There ain't no free lunch.
     
  3. Dec 17, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Maybe. I would expect they put more turns on the field or armature to make a stronger field. Higher field means more force which means more torque. That would also raise the impedance of the windings and I'd expect the motor to then run slower.

    I'm just guessing though. I'd ask what you trade off for more torque.
     
  4. Dec 17, 2017
    Daryl

    Daryl Sponsor

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    An F head in good condition with a good set of points will fire right up. One of the easier starting engines. I wouldn't think it necessary at all.
     
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  5. Dec 17, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    x2... if only people would learn how to tune them, and do it regularly.
     
  6. Dec 17, 2017
    mickeykelley

    mickeykelley Well-Known Member

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    Before I started hearing the tick tick (which is the reason for the decision to rebuild now and get a know quantity), the engine seem to start right up for me once I installed the Pertronix, rebuilt the carb and replaced the fuel pump. The only time would be if it sat for a weekend+, it would take some more cranking. I pretty well figured out the carb either evaporated the fuel or it drained back to the tank or both. My inclination it to leave it standard, but was curious on others input. It was that way for a pretty long run and seemed to work so who am I to change it.
     
  7. Dec 18, 2017
    NCRenII

    NCRenII yellow fever

    Far Nor Cal
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    I was told high torque starters had different bendix drive ratios that spun the flywheel/ring gear slower, but with more grunt.
    Better brushes and winding's handle the generated heat, but don't spin the motor any faster. I have no way to confirm or deny, it's what a electric motor re-builder told me.
     
  8. Dec 18, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    Pretty sure you are thinking of gear reduction starters - Direct Drive Vs Gear Reduction Starters

    Seems unlikely the shop would be offering an entirely different starter for the same price, but maybe. Again, you'd need to ask.
     
  9. Dec 18, 2017
    GeoffreyL

    GeoffreyL Well-Known Member

    moorestown, nj
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    Toyota starter is a good upgrade too if your not keen on original, but you probably are since your having it rebuilt.
     
  10. Dec 18, 2017
    NCRenII

    NCRenII yellow fever

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    (y) gear reduction on Chrysler products. now they have mini starters.
     
  11. Dec 18, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Upgrade? Maybe so.
    But the OEM starter is one of the parts I've rarely had trouble with. Never felt it was inadequate.
     
  12. Dec 18, 2017
    Glenn

    Glenn Kinda grumpy old man Staff Member

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    Totally agree.
     
  13. Dec 18, 2017
    Daryl

    Daryl Sponsor

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    Just a great option for someone that can't find one or doesn't have a useable core.
     
  14. Dec 19, 2017
    GeoffreyL

    GeoffreyL Well-Known Member

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    I agree, I have the original starter on all of my f-heads as well, but it is an attractive option if one ever goes south. Much cheaper than a rebuild, at least in my area.
     
  15. Dec 19, 2017
    jeepstar

    jeepstar Well-Known Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Not even possible in my neck of the woods.
     
  16. Dec 20, 2017
    moparman1978

    moparman1978 Member

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    I had two starters rebuilt nearly eighteen years ago and was informed that it would be harder to find builders for older starters which would not only be more expensive but harder to find Wills Overland offers gear reduction starters and the Toyota Landcruiser starter option is a better investment due to needing less heat to spin better with less draw of power from the battery to spin the flywheel thus not drawing too much from battery.
     
  17. Dec 20, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    So how does it spin better AND draw less power?
     
  18. Dec 20, 2017
    timgr

    timgr We stand on the shoulders of giants. 2022 Sponsor

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    I see your point, but it is possible that starter design improved over as few decades.
     
  19. Dec 20, 2017
    PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

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    Genuinely interested to understand what changes those might be.
     
  20. Dec 21, 2017
    mickeykelley

    mickeykelley Well-Known Member

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    My guess is lower quality, less material, etc. In other words, my bet would be cheaper and not last 60 years. Just saying......
     
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