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Discussion Starter #1
I seen a car the other day that had the orange wire hooked to the + side of the coil and the black from the 7531 to the - side of the coil and another wire on top of the black wire going to the motor as a ground. My question is why and also what would this do?
 

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PROUD AMERICAN WORKER!
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matty box
 

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I do it also! By connecting negative coil to head eliminates the path of ground going to battery first. I have battery grounded direct to block and both heads looped into ground also.
 

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you mean to tell me there is someone on the bullet that doesn't know about a Matty Box? Say it isn't so.:rolleyes:

BTW, not making fun of you. I'm just surprised that everyone hasn't heard the story of the "Dirty Dozen". Look it up, its interesting.
 

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Matty Box...An apparatus for automatically and continuously projecting an elapsed time in which a vehicle traveling over a racecourse will complete the course, wherein a difference between the projected elapsed time and a predicted time is continuously displayed to a driver of the vehicle, so that the driver can adjust the speed of the vehicle as needed during a race to approximate the predicted time. A plurality of magnets are mounted on a drive shaft of the vehicle in a circumferentially spaced relationship. A pickup coil is mounted adjacent to the magnets to detect movement of the magnets past the coil for measuring the distance traveled by the vehicle. A computer is electrically connected to the pickup coil and collects data from the coil for continuously calculating a difference between the projected elapsed time and the predicted time during a race. A motion switch is electrically connected to the computer and detects forward movement of the vehicle at the start of a race for automatically actuating the computer. A light gage is electrically connected to the computer and includes a set of red lights and a set of green lights which, when illuminated, indicate that the projected elapsed time is faster or slower, respectively, than the predicted time in 0.01 second increments. When one or more of the red or green lights are illuminated, the driver can decrease or increase the speed of the vehicle, respectively, so that the elapsed time approximates the predicted time at the end of a race.
Inventors: Matty; Richard D. (xxxxx Xxxxxx Rd., Marshallville, OH xxxxx)
Appl. No.: 356845 Filed: May 25, 1989
 

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Huh, how about that.
 

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Discussion Starter #9
THANKS
 

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Back in the '70s I was working on someting similar with a couple EEs at Learjet, using a magneton the front right wheel and pickup to count the revolutions and time after releasing the trans brake to guound out either the first or second set of points, advancing or retarding the timing. Then I went sailing for twenty-five years and the ignition technology was completely different before I came back.
 
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