BBC spark plugs

Discussion in 'PSI Superchargers Tech Questions' started by KDavidson, May 22, 2006.

  1. KDavidson

    KDavidson Member

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    Looking for advice on which spark plugs for Merlin steel headed BBC, blown methanol.

    Thanks,
    Keith
     
    #1
    KDavidson, May 22, 2006
  2. smbs

    smbs New Member

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    We ran a merlin headed deal and used Champion V59C with good results. 440 cube, standard 8/71, 2300 lb, 7.18 @ 185.
     
    #2
    smbs, May 22, 2006
  3. Worms

    Worms Member

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    What spark plugs does anyone reccomend for Dart Big Chief/ PSI methanol combo?

    Thanks.
     
    #3
    Worms, May 22, 2006
  4. Dale Finch

    Dale Finch Member

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    Sparkplugs

    For BB's Champion makes N57DR's through N61DR's. the 57's are very cold and will not cause detonation. you can start cold and back up a step if you wish
     
    #4
    Dale Finch, May 22, 2006
  5. Mike Canter

    Mike Canter Top Dragster
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    Verify that the Merlin heads have a .460" reach with a tapeed seat, if so a Champion V59C is the same as a NGK R5673-8 or an Autolite AR133. I think they are all one step too warm. A Champion V57C or an NGK R5673-9 or an Autolite AR132 would be better.

    The Darts I believe use a .750" reach with a gasket and should use a NGK R5671A-9 which is the same as a Autolite AR3933

    As a note here:

    The NGK R5671A-9 is the same as a NGK B9ES except the 5671 takes a 5/8 socket and the B9ES takes a 13/16 socket

    The same goes for the NGK R5673-9 it is a 5/8 where as the B9FS is a 13/16" socket
     
    #5
    Mike Canter, May 22, 2006

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