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The reason I'm rebuilding my motor......
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Thread: The reason I'm rebuilding my motor......

  1. #1

    Join Date
    Jan 2004
    Location
    Minnesota
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    388

    The reason I'm rebuilding my motor......






  2. #2
    Thank you from BT Tech Master Bulltear Forum
    Join Date
    Nov 2005
    Location
    Middle of the Iron Range MN
    Posts
    1,229
    I say she been run hard for too long. Gotta put her down son. Should run a lot better with some babbit metal on the bearings

  3. #3
    Thank you from BT ULTRA TECH MASTER!!!
    Join Date
    Feb 2005
    Location
    East Bethel Mn
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    I'm guessing you're pointing at a flat spot on the cam?
    he who dies with the most toys wins!!!
    69' amx 390 4 speed best et 11.85 @ 116mph
    VOTEBUTTON

  4. #4
    Thank you from BT Master (OIIIO)
    Join Date
    Apr 2004
    Location
    Missoula MT, Now in Santa Rosa Ca
    Posts
    759
    I dont see a flat spot just see the lack of lift......



    stick a bump stick in her, set of bearings (maybe a few rings) and leave her loose. it'll supprise you
    IF washington wont quit spending money like mad men then i suggest we claim 9 deductions in 2010 and withold or taxes till the final dead line of 4/15/2011.

    CJ7 AMC401 http://www.fordification.com/images/forum/bug.gif

    "May God have mercy on my enemies, because I WON'T!!" -General George Patton
    Member #377

  5. #5
    Thank you from BT Master Mechanic
    Join Date
    Feb 2006
    Location
    Twin Falls, ID
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    332
    That used to be a camlobe?
    401cid, T18a/D300 twinsticked.
    Lifted, locked, and Swampered

    "Its flat here...real flat. And the locals smell like potatoes."

  6. #6

    Join Date
    Jan 2004
    Location
    Minnesota
    Posts
    388
    Yes, yes, that WAS a cam lobe...

    One of the sources of the problem is that whoever had built the motor had put in a high lift, high rev cam with stock valvesprings. (which the machine shop informed me had been bottoming out.)

    The motor is now happy, having been bored .030 over, line honed, iron heads ported, two new valves, new springs, rockers and a cam that'll keep all it's big torque down where a trail machine likes it.

    Assembly in progress.

    ~cory

  7. #7
    Thank you from BT ULTRA TECH MASTER!!!
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    Jun 2004
    Location
    Central City, Colorado
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    ugghhh me no seeum problem.. me see fuel pump eccentric in wrong place.. make umm linkage..
    "A man's got to know his limitation's"

    Dirty Harry.

  8. #8
    Thank you from BT ULTIMUS MAXIMUS STATUS
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    Location
    apple valley ca
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    yes, keemosabe(can't spell while i'm at work) i think you right.
    83 eagle (r.i.p.)
    85 gl1200 gold wing LTD pilot
    1999 gl1500C valkyrie(plain gold wing)
    1994 jeep grand cherokee limited pilot
    McDonnell Douglas c-17 mechanic
    corrupting people since 1962

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