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Last Post 26 Nov 2018 09:03 PM by  Der Wankel
SEB did you mean to leave loophole for motorcycle powered cars in SM?
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Der Wankel
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26 Nov 2018 09:03 PM

    Did the SEB mean to leave a loophole for motorcycle powered cars in Street Modified classes?


    The new rules state-

    Engine block (or housings of rotary engines) must be a production unit that can be sourced from a production automobile. Any block that is not sourced from a car of the same brand will be assessed a 150-lb. weight adjustment in addition to all weight calculations in Appendix A.


    Radical holds many production car track records and the SR3 is powered by a Suzuki Hayabusa 1.3L motorcycle engine.

    Radical SR3 is a production car.


    Because whatever chassis you will be using in Street Modified won't be a Radical you will have to use the 150lb penalty with a SR3/Hayabusa engine.


    So, for my Honda N600 (stock weight 1,300lbs) it could run with -

    Honda B16b at 1,350lbs (if the engine/trans isn't too wide to fit)

    Suzuki Hayabusa 1.3L with the Quafe adapter at 1,465lbs


    I like the idea of the Hayabusa swap because it won't cost $30k to get the high revs from the engine and close gear set sequential dog engaged transmission.


    As far as "spirit of the rules" the Hayabusa swap is by far the most prevalent motorcycle engine swap for "street" cars in the US.


    So, did SEB mean to allow Hayabusa swaps in Street Modified or not?

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