Long Stroke? Or Long Rod?

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    NorthernJordan
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    Long Stroke? Or Long Rod?

    Post by NorthernJordan on Wed Nov 07, 2012 5:31 am

    Im not on about the activities of many 70's TV stars with minors.... Shocked I am on about further tuning my jet?

    What would be the better option to get a torque motor? I guess a 60mm crank would be best, or would having a longer rod on the crank make ,much of a difference?

    If so what rod, and would it be worth finding a cheap SIL crank (good webs) and having it rebuilt with a longer jap rod and quality bearings. Rather than do that to a good MECeur crank?

    Or is that more effort than its worth and should i just fork out for a 60mm crank?




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    ttscshaggy

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    Re: Long Stroke? Or Long Rod?

    Post by ttscshaggy on Thu Nov 08, 2012 3:32 am

    Stroking the top end is a Torque helper. The longer rod helps too.
    You have to remember a higher stroke lowers port timing by a fraction. So you will have a bit of a gruntier motor but loose a bit off the top end. unless you correct these things of course to where you want it.

    I dont really know the qualities of SIL cranks but if rebuilding for a yam rod...Take it to Mr Edmonds ! He will make you a big end pin to a super decent tolerance.
    He's a bit rushed off his feet though at the moment from what I hear.
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    NorthernJordan
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    Re: Long Stroke? Or Long Rod?

    Post by NorthernJordan on Fri Nov 09, 2012 6:00 am

    If i were to go for a long stroke crank, i would combine that with porting work to suit. The aim would be to pull taller gearing, so i can gain hight top speed.


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