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Thread: need help understanding scr and dcr and with what fuel

  1. #1

    need help understanding scr and dcr and with what fuel

    I am building a 509 bbc for truck pulls. I have 14 to 1 static comp. now.
    How high can I go with the dynamic comp with say a 114 octane ( say Sonoco HCR Plus). Also at what piont will the dynamic get to high. I am trying to gian as much torque as I can in this motor. The block is a Dart Big M and I have the heads set up with the extra lifter valley bolts to help with any extra pressure that a higher dynamic comp. could cause.
    Thanks Swany

  2. #2
    Join Date
    May 2007
    San Dog
    I'm no expert but I understand that a full tilt race engine wants DC ratios of 9.5-10:1.
    "Good people sleep peacefully in their beds at night, only because rough men stand ready to do violence on their behalf."

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