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Thread: 120 Volt varible Speed Motor for new EFI test/build bench?

  1. #16
    Super Moderator dave w's Avatar
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    The AC sine wave from the Pickup Coil is about 15 volts (peak to peak). The ignition module converts the AC sine wave from the Pickup Coil to a square wave for the ECM to "see" RPM's. An AC signal generator could be used on a test bench, instead of spinning the distributor to supply the ignition module an AC sine wave. A signal generator that can produce an AC sine wave of about 15 volts peak to peak and capable of changing the AC sine wave frequency from 0 Hertz to 500 Hertz will "Trick" the ignition module into providing the ECM with RPM's from 0 to 14,000 RPM's.

    dave w

  2. #17
    Fuel Injected! JeepsAndGuns's Avatar
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    Now all yall need to do is connect the dimmer switch to the throttle/tps, so as you open the throttle, it will make the motor speed up and simulate the rpm's rising as you open the throttle.
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

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    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  3. #18
    RIP EagleMark's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    Now all yall need to do is connect the dimmer switch to the throttle/tps, so as you open the throttle, it will make the motor speed up and simulate the rpm's rising as you open the throttle.
    Need the sewing machine foot pedal to operrate the servo to open throttle!

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
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  4. #19
    Super Moderator Six_Shooter's Avatar
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    Quote Originally Posted by EagleMark View Post
    Need the sewing machine foot pedal to operrate the servo to open throttle!
    Don't even need to get that complicated, could just attach the TPS to the pedal.
    The man who says something is impossible, is usually interrupted by the man doing it.

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