Plug Suggestion

Discussion in 'PSI Superchargers Tech Questions' started by axeltwister, Apr 29, 2007.

  1. axeltwister

    axeltwister New Member

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    Switching from gas to Alcohol, What plug is suggested: I run an altered w/Madcap 439 850hp, hilborn stacks with an 80-a, ingition is a supermag III
     
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    axeltwister, Apr 29, 2007
  2. Mike Canter

    Mike Canter Top Dragster
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    You never said what heads you are using. It would be easier to tell us what plugs you are using for gas now so we can get the size correct.
     
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    Mike Canter, Apr 29, 2007
  3. axeltwister

    axeltwister New Member

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    Plug question

    Thanks for the response Mike, Using Steel HP Chev heads square port, Manley valves, no porting or polishing, nothing fancy :D , was using the champion V63 plugs with gas....
     
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    axeltwister, May 1, 2007
  4. Mike Canter

    Mike Canter Top Dragster
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    A Champion V63C is the same as a NGK R5673-8 which is a14mm, Taper Seat, 3/8 reach with a 13/16" hex. If you want to stay with a Champion then use a V57C or a NGK R5673-9. Most every one in that application would use a -9 heat range but if you want one step colder then go to a V55C or a NGK R5673-10. I would gap them at .019"
     
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    Mike Canter, May 1, 2007
  5. axeltwister

    axeltwister New Member

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    Again thanks for the tech help Mike, I think I'll do as suggested and start with the colder plug, the NGK R5673-10 and see how she responds... Tony
     
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    axeltwister, May 1, 2007

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