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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Engine » Big Mechanicals: Head, Cyl, Piston, Rod, Crank, Flywheel, Cases, Bearings » Archive through October 22, 2006 » Crank location question... « Previous Next »

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M1combat
Posted on Tuesday, June 07, 2005 - 02:19 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What are the benefits and drawbacks of moving a crank fore/aft or up/down in the cases?
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Mikej
Posted on Tuesday, June 07, 2005 - 07:58 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The first question would be: why?
Forward or backward might unbalance the V,
Up or down and you'd better be checking your throw clearances very well.
You'll basically be re-engineering the engine.
Could be fun, just ask S&S. ; )
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M1combat
Posted on Tuesday, June 07, 2005 - 01:07 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Yeah, I figure forward/backward would be a bad idea on a V-anything but figured I'd ask.

What about up/down? My assumption is that you would want con-rods as short as possible w/o causing too much side loading which would kill your ability to use slipper pistons. I suppose that making sure that your side loading ratio is well above 1.7:1 would be more important than short con-rods though...
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Panic
Posted on Monday, June 20, 2005 - 08:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Up or down is going to change the V angle.
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