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Thread: Doing a little Tri-Z head milling!

  1. #1
    Join Date
    Jun 2010
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    House Springs MO
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    Doing a little Tri-Z head milling!

    Yeagerb came over last night and needed .020 taken off a Tri-z head. This is the first head shaving I've done. The plug hole is 90 degrees to the deck surface so it can be easily chucked up in the lathe and checked with the indicator. We had .001 runout prior to turning. I think it turned out pretty good.

    Next experiment will be with squish bands and piston dome profiles. I'm not re-inventing the wheel here, but it just goes to show what can be accomplished in a home garage.
    Last edited by bkm; 02-10-2018 at 09:26 AM.

  2. #2
    brandonlowe2's Avatar
    brandonlowe2 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    May 2016
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    Georgia
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    hey that looks great! :-)
    1983 Selvy 300R - Check out the Build Thread
    1985/86 Tri-Z - Build Thread Coming Soon
    1985 Tri-Z
    1986 250sx
    1985 ATC70
    1985 ATC 200M

    Youtube Channel "Lowe Off Road"

    - Brandon

  3. #3
    Join Date
    Jun 2010
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    House Springs MO
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    Quote Originally Posted by brandonlowe2 View Post
    hey that looks great! :-)
    Thanks buddy. Your head popped my cherry. Lol

  4. #4
    Join Date
    Apr 2011
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    There's no such thing as bad heads, only good heads and great heads.
    It sucks to get old

  5. #5
    brandonlowe2's Avatar
    brandonlowe2 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    Good! Looks like you been doing it for years :-)
    1983 Selvy 300R - Check out the Build Thread
    1985/86 Tri-Z - Build Thread Coming Soon
    1985 Tri-Z
    1986 250sx
    1985 ATC70
    1985 ATC 200M

    Youtube Channel "Lowe Off Road"

    - Brandon

  6. #6
    Join Date
    Jul 2012
    Location
    Seattle, Washington
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    I had my z head milled down yearz ago, it runs pretty nice. I never bothered to use my billet cool head because it runs so good.

    http://www.quadpit.com/mags/1985/3-4...-report-02.htm
    Last edited by 3 Wheel Drive; 02-08-2018 at 01:53 PM. Reason: phase too

  7. #7
    Join Date
    Apr 2011
    Location
    Mexico
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    Now do me and my OCD a favor, roll your sleeves up past your elbows (safety first) and spin that chamber against some 600 grit sandpaper to make it shine
    It sucks to get old

  8. #8
    Join Date
    Jun 2010
    Location
    House Springs MO
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    Quote Originally Posted by El Camexican View Post
    Now do me and my OCD a favor, roll your sleeves up past your elbows (safety first) and spin that chamber against some 600 grit sandpaper to make it shine
    It was 25 degrees in the garage. Chicks dig scars.

  9. #9
    Join Date
    Apr 2011
    Location
    Mexico
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    Quote Originally Posted by bkm View Post
    Chicks dig scars.
    Maybe not that unit, but most lathes don't leave scars, they leave widows.
    It sucks to get old

  10. #10
    Join Date
    Jan 2009
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    ohio
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    Anybody have any idea how to mount a head with out a 90deg plug hole? I have some that need done
    If its on the internet its got to be true they can't put any lie's on the internet

  11. #11
    Join Date
    Apr 2011
    Location
    Mexico
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    Quote Originally Posted by big specht View Post
    Anybody have any idea how to mount a head with out a 90deg plug hole? I have some that need done
    I'm not aware of one. I think they have to be done on a milling machine.
    It sucks to get old

  12. #12
    Join Date
    Jun 2010
    Location
    House Springs MO
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    Quote Originally Posted by big specht View Post
    Anybody have any idea how to mount a head with out a 90deg plug hole? I have some that need done
    Faceplate with spacers that mount on top of the flats for the stud holes is what I was drawing up in my head.

  13. #13
    Join Date
    Jun 2010
    Location
    House Springs MO
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    Quote Originally Posted by El Camexican View Post
    Maybe not that unit, but most lathes don't leave scars, they leave widows.
    Yes they will and even a little guy like this will break a finger. I know better, just like taking a bike for a quick spin without a helmet on, nothing could ever happen to me.

  14. #14
    Join Date
    Jun 2010
    Location
    House Springs MO
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    Quote Originally Posted by 3 Wheel Drive View Post
    I had my z head milled down yearz ago, it runs pretty nice. I never bothered to use my billet cool head because it runs so good.

    http://www.quadpit.com/mags/1985/3-4...-report-02.htm
    We went .020 on this one, but it looks like the wrench report suggests .030.

  15. #15
    Join Date
    Apr 2011
    Location
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    Quote Originally Posted by bkm View Post
    We went .020 on this one, but it looks like the wrench report suggests .030.
    You won't regret that.
    It sucks to get old

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