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  1. #1
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    Default 4 5/8 s&s flywheels

    ok I just recently picked up a set of late shovelhead 4 5/8 s&s flywheel assembly and haven't decided to just stroke out one of my shovelheads to a 86 ci or go big and make a 96 ci shovelhead just see what people have done, what works best and what other parts like cams, roller rockers , and duel plug heads, ignition works well together

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    I'm doing a 96" Pan ....

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    Got a thread here on CC on the build...

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    Quote Originally Posted by Munchie View Post
    ok I just recently picked up a set of late shovelhead 4 5/8 s&s flywheel assembly and haven't decided to just stroke out one of my shovelheads to a 86 ci or go big and make a 96 ci shovelhead just see what people have done, what works best and what other parts like cams, roller rockers , and duel plug heads, ignition works well together
    It really depends on how much money you have to through at it...

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    Well I don't have new motor money but if certain parts are worth the money I can save for it

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    To do the 96" you will be needing the jugs and pistons ...
    S&S offers a kit that come with all parts to pull that off.
    Might also need a longer intake too ...

    You said that the crank is together, be a grand idea to re-balance for the difference in the weights of the larger pistons..

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    I plan on checking it all over, I know s&s makes a kit but was wondering if anybody had a better different combination out there that might work better (because there is more than one way to skin a cat)

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    Big Bore jugs are also made by a few difference company's
    Could call Axtell and see what he offers, pretty sure the pistons that he sells will be J&E ...

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    I'm in the middle of building a 4 5/8 stroker.
    What I'm going for is 3 1/2" bore, that brings it to 89". That still keeps it fairly simple. Just the s&s stock bore stroker pistons and standard cylinders and heads.
    So if you are keeping it on a budget that saves having the heads modded, the cases bored out and heads modded as well.
    What I'm going to run in it is a Leineweber L3S cam, Jims roller rockers, Morris magneto and just for good measure I'll be running dual plugged heads s&s heads, that also flow slightly more than the old HD ones.
    In a light bike that should be a fun engine.
    Going for the big bore will surely give it some more oomph, but I guess it all depends on how much you can throw at it.
    Last edited by andri; 02-21-2018 at 4:53 PM.

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    andri.... I'm pretty sure 4 5/8 stroke with 3.5" pistons = 93 cubes
    That's what I have been running for the last 15 years on my pan.
    I am running the L51 Lienweber. Jims powerglide tappets, morris mag. baisley rollers. dual plug std
    heads, 9.5:1 comp. & modified S&S E (bored out to 42 mm, So the venturi is sized
    between an E & a G) & a thunderjet.

    The LS3 is a Boss cam... great choice!

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    Got a brand new one for sale ...
    $200 and the ride it will be yours ...

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    Last edited by Dragstews; 02-22-2018 at 12:36 PM.

  11. #11
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    Quote Originally Posted by Revelator View Post
    andri.... I'm pretty sure 4 5/8 stroke with 3.5" pistons = 93 cubes
    That's what I have been running for the last 15 years on my pan.
    I am running the L51 Lienweber. Jims powerglide tappets, morris mag. baisley rollers. dual plug std
    heads, 9.5:1 comp. & modified S&S E (bored out to 42 mm, So the venturi is sized
    between an E & a G) & a thunderjet.

    The LS3 is a Boss cam... great choice!
    no. it is 89" like he said.

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