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Technical Drilling Lifter Bores- but where???

Discussion in 'Traditional Hot Rods' started by ruppi1932, Jun 11, 2021.

  1. ruppi1932
    Joined: Jan 16, 2018
    Posts: 38

    ruppi1932
    Member
    from Germany

    Hello
    i bought a set of lifter for my flathead at schneider cams. There was a note on it that I should make any holes in my block - but not where exactly. When asked, the people at Schneider said that they didn't know - they are probably red-headers lifters that they haven't installed themselves yet- really great service ....
    I also asked red-headers but didn't get an answer from there - a shame.
    can someone explain to me or send a picture where I have to make the holes ?!

    Thanks in advance
    Matthias
     

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  2. leon bee
    Joined: Mar 15, 2017
    Posts: 798

    leon bee
    Member

    kidcampbell71 likes this.
  3. ruppi1932
    Joined: Jan 16, 2018
    Posts: 38

    ruppi1932
    Member
    from Germany

    thanks for the quick feedback. but i still don't know exactly whether i should drill the hole in the block or the lifter ??
    the lifters have blind holes on the top where I can use a tool to counterhold. so i can hold the lifter while adjusting it.
     
  4. blowby
    Joined: Dec 27, 2012
    Posts: 8,661

    blowby
    Member
    from Nicasio Ca

    I measured the height of the hole in the lifter when installed and on the base circle of the cam, and drilled the holes to line up so I could insert a rod to hold them from spinning while adjusting.
     
    irishsteve likes this.

  5. birdman1
    Joined: Dec 6, 2012
    Posts: 1,591

    birdman1
    Member

  6. alchemy
    Joined: Sep 27, 2002
    Posts: 20,405

    alchemy
    Member

    Drill the holes as low on the boss of the block as you can. Then make sure to remove any snagging warf from the inside of the bore as well.

    Many cams we use are regrinds, reducing the height of the lobe, which will be lowering the lifter in the block. Getting the hole drilled as low as possible should hopefully let the pin hit the lifter in the middle of its body, right in that slot.

    Don't rely on those four holes in the top of the lifters to hold a tool when you are cranking on them. The adjustable tip should be really firm and seems to make the stock Johnson-style tool slip out of the lifter holes.
     
    sidevalve8ba likes this.
  7. The “tool” used to hold the lifters stationary is at best very hard to use. Drill the holes as low as you can get the drill motor in a low position. It’s not that critical to be precise with your new holes/much easier than using the “tool” that slips off the lifter too easily!! Flatheads Forever! 6E8D339B-4502-40F1-9464-7C11D930ABA6.jpeg 47EBF12A-2773-4BD0-AC23-1CFA502140FC.jpeg 24E93E2C-34CD-4B88-A408-BAF5413955F8.jpeg
     
    stillrunners and kidcampbell71 like this.
  8. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 12,602

    Johnny Gee
    Member
    from Downey, Ca

  9. ruppi1932
    Joined: Jan 16, 2018
    Posts: 38

    ruppi1932
    Member
    from Germany

    Ok - thanks for all the answers! Now I understand!
    @ flatheadjohn47: nice intake manifolds! I also milled one for the 4-71 blower.
    regards
    matthias
     

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  10. banjorear
    Joined: Jul 30, 2004
    Posts: 4,479

    banjorear
    Member

    This.
     
  11. GordonC
    Joined: Mar 6, 2006
    Posts: 3,141

    GordonC
    ALLIANCE MEMBER

    Here's a pic of where I drilled mine. No specific measurement really, just where they will work ok and make it easy to get at.

    20180222_162256.jpg
     
    28hiboy, dwollam, guitarguy and 2 others like this.

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