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Thread: cube and stroke question for f1r

  1. #1
    Junior SCH Member
    Join Date
    Dec 2009
    Location
    Millersport Ohio
    Posts
    1

    Question cube and stroke question for f1r

    What do you think would be better for an F1R with Victor jr heads @ 10-1 comp. ratio for DR competition. 4.125 bore with a 4.00" stroke or 3.75"? And why?
    Current. 420" N/A 1.26 60'-9.48 1/4 On the bumper!
    New Build- 400" Dart Iron Eagle. 4.125 bore 3.75 stroke 10-1 Comp. F-1R Procharger.

  2. #2
    Senior SCH Member vinces427bb's Avatar
    Join Date
    Jul 2011
    Location
    Los Lunas, NM
    Posts
    222
    3.75'' stroke = allows more room for the ring package compared to the compression height needed with the 4.00'' stroke.
    any chance of going with a 3.875'' stroke for a couple more cu or just crank the boost for more hp ??

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