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  1. #21
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    Got the Acc program loaded on my new computer...
    Yippy, can load more numbers onto the chart now ..

    And the numbers are ....



    Now to go a step further with matching the recips of both Pistons/Rods ... Here's how that's done ...

    See the recip weight number for the front rod in the chart ..
    It's 232 grams, the rear recip is 238 that's 6 grams diff. ... Weighed the front piston and the rear, got 1.5 grams diff. on them ..
    That's a total of 7.5 grams ... By removing 7.5 grams from the rear piston and/or recip part of the rear rod, we will have attain a match on the recip weights of both Pistons/Rods combo ...



    Pulled all 7.5 grams from the piston ...




    New chart reflecting the 7.5 grams that has been removed ..



    Time for some holes to be drilled ..
    ___________________________________

    That's one ...



    When I first seen the drop on the balance stand, had the thought of adding a slug of Mallory metal to the light side ... But those slugs are not cheap by no means ...
    Last edited by Dragstews; 07-21-2021 at 12:01 PM.

  2. #22
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    Been very busy on this motor job .. Ready to build up the crank ..

    Sprocket shaft nut will see 400 ft pounds of torque on it ..



    Over the years of wrenching on these oldies, I would wager to say that I seen over 25 sprocket shafts that have spun in the wheel..

    Guessing that's why the Mo-Co in 73 started using a larger taper on the sprocket shaft ..
    The Big Twin was gaining some ponies in the late 50's and 60's ..
    Harley knew that they had an issue with the old design and was time to step up to the plate with a hardier design capable of staying together under hard usage ...

    Had a well known "Drag Racer" tell me in order to help keep the shafts from spinning he would use battery acid on the tapers .... Think I'll stick to using 609 Loctite .. !!


  3. #23
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    What kind of software are you using there?

    Is it the same one that does your dyno calculations?

  4. #24
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    Quote Originally Posted by confab View Post
    What kind of software are you using there?

    Is it the same one that does your dyno calculations?
    It is ....
    Does come in super handy with having the flywheel balance, camshaft, gearing and cylinder heads programs at your fingertips ...

    ... /// https://www.hotbikeweb.com/desktop-d...windows#page-5 \\\ ...
    Last edited by Dragstews; 07-23-2021 at 4:18 PM.

  5. #25
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    Crank is all in one piece now ...



    Torque numbers;
    Sprocket Shaft 400 ft-lbs
    Pinion Shaft 180 ft-lbs
    Crankpin 250 ft-lbs

    Side play on female rod .020", Runout less than .001"
    ____________________________________________

    Getting around to prepping the motor case for laying on the powder ..



    Be on it for awhile .. Powder is on the way from Eastwood ...

  6. #26
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    Just about done with the roughing in ...
    Had a few welds to do .. But it's downhill now ..

    Got the case vent done .. Wanted no problems venting 92 cubies so I choose to use a 1/2" barbed hose fitting ...


    ________________________________________

    The Eastwood powder showed up today ..

    Not anywhere close to being ready to shoot it ..
    Case prep will take some time to accomplish ...
    Last edited by Dragstews; 07-29-2021 at 1:21 PM.

  7. #27
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    Loving the thread and man that's a lot of hard work for someone else to enjoy, great job.

  8. #28
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    Glad you're finding the thread entertaining ...

    The owner said to make it super slick and ......



    I said .....

    "OK" ... How bad do ya want it to be .. ??

    Not at all sure what the motor will find a home in, but however, I got a feeling it will be super nice ..

    Last edited by Dragstews; 07-29-2021 at 6:12 PM.

  9. #29
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    Been so busy with the trannys that I kinda put this build on the back burner for a while ..



    Got a new tool for the work table that will allow for a bit more comfort with handling the motor while building it ...

    Soon will get around to powder-coating the lower end, it's almost done with the prepping part of the job ..
    Last edited by Dragstews; 6 Days Ago at 8:20 PM.

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