spark plug indexing?

Discussion in 'Other Service and Maintenance' started by rydahog, Jul 2, 2009.

  1. rydahog

    rydahog Active Member

    228
    26
    0
    Anyone check their spark plug indexing when changing plugs?
    What index washers used? any other alternative. thanks ryd :D
     
  2. Bud White

    Bud White Well-Known Member Retired Moderators

    3,270
    48
    2
    on a stock bike and even semi modded .. waste of time
     
  3. glider

    glider Veteran Member

    25,464
    108
    44
    Waste of time and money on a street bike, very marginal even on a drag bike.
     
  4. dangerdan

    dangerdan Junior Member

    922
    26
    0
    I was curious about this , so I looked it up.

    The idea of indexing is to position the spark plug so that its gap is facing the center of the cylinder, angled slightly toward the exhaust valve. This is important because, as the piston approaches TDC, the air/fuel charge is being compressed. The charge or "mixture" is being forced toward the area of the spark plug—and normally, the exhaust valve. The speed of this force inside the combustion chamber may surpasses supersonic speeds.

    When 1/4 mile times are measured in 1/1000 of a second, every bit helps and that includes marginal ones. This could make the differnce between winning and loosing.
     
    Last edited: Jul 2, 2009
  5. rydahog

    rydahog Active Member

    228
    26
    0
    ok thanks for the info..:) i won't be doing any 1/4 mile runs in the near future. so leave well enough alone and be happy with my 44-47 mi per gallon and sweet sound that my bike makes now!! :)
     
  6. dangerdan

    dangerdan Junior Member

    922
    26
    0
    Ok I missunderstood this. I thought a new pug hole was drilled into the heads to get at the sweet spot.

    I missed the part about only using a washer underneath the plug.

    Smitty I agree with you, total waste of time.
     
  7. glider

    glider Veteran Member

    25,464
    108
    44
    They say if you do the plug indexing and use one of those magnetic collars around the fuel line to align the molecules in the fuel that you can dilute the fuel with 50% water and get over 74 MPG on any V Twin.:D
     
  8. dangerdan

    dangerdan Junior Member

    922
    26
    0
    You got the link for that magnetic collar.

    :bigsmiley22::bigsmiley22::bigsmiley22:

    Ok, point made.
     
  9. Bud White

    Bud White Well-Known Member Retired Moderators

    3,270
    48
    2

    I think using a sperated water injector would bump ya to 100 MPG

    Ask and you will receive

    - Harbor Freight Tools - Quality Tools at the Lowest Prices :D:bigsmiley22:
     
    Last edited: Jul 3, 2009
  10. HarleyHarry

    HarleyHarry Banned

    548
    0
    0

    What type of snorkle would I have to use for that?
    When running your bike with the injector as you suggested would you not measure in knots (KPG)?:small3d004: