Spark Plugs to suit B.B.C - Dart 14 degree

Discussion in 'PSI Superchargers Tech Questions' started by Worms, Jul 11, 2006.

  1. Worms

    Worms Member

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    What spark plugs would be best to suit Dart 14 degree big chief heads, blown alcohol, approx. 10.2:1 compression, super mag iv, hoping for around 30 psi boost? Would prefer ngk. I think they have to be .750" reach, 14mm and 5/8 hex. Any help greatly appreciated.

    Thanks.
     
    #1
    Worms, Jul 11, 2006
  2. Mike Canter

    Mike Canter Top Dragster
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    NGK R5671A-9 or a NGK R5671A-10. Those are.750" reach with gasket, 5/8 hex
     
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    Mike Canter, Jul 11, 2006
  3. Worms

    Worms Member

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    Thanks for the info.
     
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    Worms, Jul 12, 2006

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