Sbc Spark Plugs

Discussion in 'PSI Superchargers Tech Questions' started by RBS, May 12, 2006.

  1. RBS

    RBS Authorized Merchant

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    Looking For A Good Spark Plug To Run In A Sbc Blown Engine. Using Brodix Track 1 Heads With A 8-71 And A Vertex Mag. Looking For A Brand And Number Thanks
     
    #1
    RBS, May 12, 2006
  2. Mike Canter

    Mike Canter Top Dragster
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    If they are the gasket seal that are .750" then use a NGK R5671A-9.
     
    #2
    Mike Canter, May 12, 2006
  3. rickey

    rickey Member

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    JR we have the blown SBC wih a 14-71 and run the NGK 6061-10

    we have the -12 Brodix heads
     
    #3
    rickey, May 14, 2006
  4. pop

    pop New Member

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    u need to run ngk R5671-10
     
    #4
    pop, May 31, 2006
  5. Mike Canter

    Mike Canter Top Dragster
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    The 6061 take a 13/16 socket and the 5671 takes a 5/8 socket so that will make a difference depending on the head.

    The fact that the plug is a -9 or a -10 doesn't really make much difference since you are not reading the porcelein color when using alcohol. Which ever is easier to get.
     
    #5
    Mike Canter, Jun 1, 2006
  6. pop

    pop New Member

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    plugs

    -9 is too hot
     
    #6
    pop, Jun 5, 2006
  7. Leon

    Leon New Member

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    that depends. If it doesnt blister the porcelein,id rather have a hotter plug than 1 too cold and try to misfire because of tip temp being too low.A hotter plug doesnt control combustion chamber temp any how, it just controls tip temp.If their is a lot of cylinder pressure, a colder plug will help to keep it out of detonation,but otherwise using a 9 over a 10 wont make or break the engine.
     
    #7
    Leon, Jun 5, 2006
  8. IGO1320

    IGO1320 T/D 2268

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    Plugs

    I run R5671-11 with MSD 7-AL2 .020 gap, 11.7 to 1, 8-71 standard helix, 8% over 19-23 lbs of boost, no misfires and no problems, runs 6.70's 201-203 mph.
     
    #8
    IGO1320, Jun 6, 2006

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