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battery cutoff question

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  • zbrownZ Offline
    zbrownZ Offline
    zbrown
    wrote on last edited by
    #1

    Ok question

    I am wiring my cutoff but need to know what will be legal....

    per NHRA rules it says it "must kill all electrical functions"

    this is how my car is wired right now.....

    legacy image

    Is this legal since the large gauge wire to the starter and alt. are not on the switch?? It kills all my functions on the car as is and kills the car.....

    I mean do i need to bring the alternator wire all the way back to the battery and then have the large wire to the starter on the switch??

    ALL I NEED TO KNOW IS IF THE PICTURE I POSTED IS NHRA LEGAL WITHOUT ANY DOUBT!!

    ha thanks guys

    rx7-8.89@157mph
    12v dodge, twins

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    • 63vette6 Offline
      63vette6 Offline
      63vette
      wrote on last edited by
      #2

      Is not NHRA legal.

      1 Reply Last reply
      0
      • zbrownZ Offline
        zbrownZ Offline
        zbrown
        wrote on last edited by
        #3

        alright, thanks

        you would know

        rx7-8.89@157mph
        12v dodge, twins

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        • XJHEADX Offline
          XJHEADX Offline
          XJHEAD
          wrote on last edited by
          #4

          But it will pass their test.

          7.64 @ 187 3400 lbs. on KORN
          TTSBF
          RTCTTFMF PTOSITW

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          • K Offline
            K Offline
            KA-T_240
            wrote on last edited by
            #5

            Anyone got a pic of what is legal? One of these days I'll have to do this.

            PM me for:
            Sandblasting(I use glass beads)
            Diesel repairs or performance products.

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            • DaveHD Offline
              DaveHD Offline
              DaveH
              wrote on last edited by
              #6

              KA-T_240;310296 wrote:
              Anyone got a pic of what is legal? One of these days I'll have to do this.

              legacy image

              DaveH
              '94 Supra- 7.77 @ 176mph

              legacy image

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              • 63vette6 Offline
                63vette6 Offline
                63vette
                wrote on last edited by
                #7

                The alternator must be isolated as well. All Power must be cutoff to the entire car to be legal. Your diagram will also kill the battery even with the kill switch turned off if a single wire alternator is used.

                Here is a PDF with pretty good wiring for a race car.

                http://myweb.cableone.net/jburrow//wiring.pdf

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                • zbrownZ Offline
                  zbrownZ Offline
                  zbrown
                  wrote on last edited by
                  #8

                  DaveH;310301 wrote:
                  legacy image

                  yeah i redid mine today and did like so^^

                  63vette;310314 wrote:
                  The alternator must be isolated as well. All Power must be cutoff to the entire car to be legal. Your diagram will also kill the battery even with the kill switch turned off if a single wire alternator is used.

                  Here is a PDF with pretty good wiring for a race car.

                  http://myweb.cableone.net/jburrow//wiring.pdf

                  I guess if they give me a hard time i will either have to change to a duel circuit switch or add a alternator kill solenoid

                  easy to do now since i have the alt wire at the rear now

                  this is what i ended up with, it is a flaming river switch.... I ran short of 6 ga. by 2ft for the alternator lead :mad:

                  legacy image

                  legacy image

                  rx7-8.89@157mph
                  12v dodge, twins

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                  • 63vette6 Offline
                    63vette6 Offline
                    63vette
                    wrote on last edited by
                    #9

                    Like Bill said... it will pass 99.5% of the time the way you did it.

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