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clutch fan

  1. Originality
    Trying to get the biggest volume of air through my big block radiator, I'm trying to figure out which FAN would be better to run. The 7 blade and the 5 blade, both seem to have been available back in 1970 so determining which is best for the big block has me wondering. Would you go with a 18"...
  2. Drivetrain & Performance
    I'm using the old school clutch fan for cooling, want to switch to electric. Any idea the CFM my 7-blade clutch fan puts out?