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Thread: Please help

  1. #1
    Join Date
    May 2003
    Location
    Maine
    Posts
    1,549

    Please help

    what is the best compression for a 440 kit 11:1? or 12:5???
    Help quick
    05' 450R
    07' 50
    05' crf450x

  2. #2
    Guest
    do u want to run race gas. 11:1 u may be able to get away with 93 depending if its a wiseco or JE but 12.5:1 ur gunna need race gas

  3. #3
    Join Date
    May 2003
    Location
    Maine
    Posts
    1,549
    It is wiseco i was thinkin 11:1 is that a good idea im abotu tp order it
    i dont do major racing but i do ride it hard like it was being raced
    so 11:1?
    05' 450R
    07' 50
    05' crf450x

  4. #4
    Guest
    get a JE 10.8:1 and run 93 octane. Much better than wiseco and you wont need race gas

  5. #5
    Join Date
    May 2003
    Location
    Maine
    Posts
    1,549

    ..

    so if i do go with W than ill need race gas?\
    05' 450R
    07' 50
    05' crf450x

  6. #6
    Guest
    if you get a wiseco 11:1 you wont need race gas. if you get a JE 10.8:1 you wont need race gas. Any higher on either and you may have to start mixing in some race gas. The reason it is different between the two is because wisecos compression ratios are lower then the advertised. JEs is more accurate

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