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Thread: Chainsaw cylinder casting help,advice,input

  1. #11
    Quote Originally Posted by Red97 View Post
    Probably 3-5 at first. Try some different port timings to get it dialed in.Maybe cast in a iron sleeve.Goal would be to market a low volume high performance big bore kit. Don't imagine more than 10 a year.
    No doubt ambitious for a first project. Your starting point with respect to foundry and casting experience can be a factor in process choice. You'll have a lot of equipment to build and processes to master if you are starting from scratch on your foundry build......furnace, molten metal management, flasks, possibly muller, molding sand, etc. If you really think <10pc/yr and you may change the casting features a few times, you might consider lost foam, especially if you are starting from scratch. I think it's a great match for that part and am confident I could cast that as one piece cyl/head complete with ports......no cores. After furnace build and molten metal handling, which you will need for any approach, if you have wood working machinery to machine foam patterns.....away ya-go.

    Here's a link on pros/cons and also a simple cylinder head I did as just an experiment.

    http://forums.thehomefoundry.org/ind...pros-cons.120/

    http://forums.thehomefoundry.org/ind...deep-draws.13/

    http://forums.thehomefoundry.org/ind...nd-my-rig.145/

    http://forums.thehomefoundry.org/ind...m-patterns.14/

    Best,
    Kelly
    My furnace build ----- I toil and fettle then foam turns to metal!

  2. #12
    Thank you very much for the info and links.

    The lost foam looks really interesting for low volume.

    Have some experience in wood working but not a lot.

    Seems the foam could be a viable option for just a few cylinders a year.

  3. #13
    Moderator DavidF's Avatar
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    I think I would do a 2 piece design (separate the head and cylinder) and press the sleeve in. Im not a big fan of blind cylinders
    I
    A calm sea does not make a skilled sailor...
    http://thehomefoundry.org

  4. #14
    That would be the better way to go. Trying for a bolt on type. Don't want to add ththe extra variables to the saw itself.

  5. #15
    Moderator DavidF's Avatar
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    I thought I found a cad model of your cylinder on grabcad.com but its not accurate and has errors in it.
    A calm sea does not make a skilled sailor...
    http://thehomefoundry.org

  6. #16
    Well that sure would be nice.

    Think I'm going to focus on the lost foam technique. Seems the easiest way to start. When starting with nothing foundry wise.

  7. #17
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    Lost PLA would be another option. If you printed the model in two parts, split in half vertically, it could be printed. Then glued together (around your iron sleeve if desired).

  8. #18
    I'll probably end up with a 3d printer. Try that option.

    Have a member that is going to try and cast a couple for me, as I'm no where close to being setup.

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