Thermostat in a 604

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  • mqdirtracer57
    Senior Member
    • Mar 2008
    • 493

    #1

    Thermostat in a 604

    Do I need to keep it in there or use a restrictor?
  • Egoracing
    Senior Member
    • May 2007
    • 4852

    #2
    A restrictor is a 30+ year old crutch for bad water pumps. If you are using a good pump do not put anything in the neck. If you need it to get the car warm replace the stock T stat with a fail open racing unit.

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    • mqdirtracer57
      Senior Member
      • Mar 2008
      • 493

      #3
      I am using and Edlebrock circle track pump #8817 with a restrictor...i guess i will take the restrictor out and put a t-stat in its place

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      • CC57
        Member
        • Feb 2008
        • 67

        #4
        Hopefully a reply that will give you a bit of confidence and comfort that you're not about to have an issue with a thermostat...

        In my Dirt Mod, I was running on Alky/Methanol, which is notoriously hard to warm up.

        So I ran a 165 degree fail safe in it. The stat helped tremendously in bringing the engine's operating termperature up to a good range.

        And I never, in the 3 seasons I had the car, experienced a thermostat or cooling related problem

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