Rush slip on spark plugs

Discussion in 'Touring Models' started by FLIPBEL, Aug 22, 2010.

  1. FLIPBEL

    FLIPBEL Member

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    I installed rush slip on 1.75 on my 2009 egc about 200 miles ago and I wanted to show the difference in the color of the plugs. Well I am happy to find out that there is no difference in the color. I added before and after pics.
     

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  2. Hoople

    Hoople Account Removed

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    Flip,
    Were you expecting to see the plugs go even leaner in color?. Trust me, you won't. I have made Dramatic changes in my A/F ratio and the plugs go unchanged due to the E10 fuels today. It drove me crazy until I learned what was going on.
    I have ran 12.5:1 air fuel ratios and the plugs looked near white.
     
  3. FLIPBEL

    FLIPBEL Member

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    After all the posts I had read about Rush 1.75 I was more + then - in regards to the color. I just wanted to make sure.
     
  4. Hoople

    Hoople Account Removed

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    It can't be checked by plug color. Everything else being equal, E10 alone is .3 A/F ratio leaner than non-alky. Meaning if you A/F ratio was adjusted and measured at say 13.8 with Non-alky fuel, just filling your tank with E10 will result in your A/F ratio now being 14.1

    You need to pump more fuel in with the same amount of air to have the same A/F ratio at the pipe.