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Thread: Ford 300 I six engine (working scale model)

  1. #1
    Join Date
    May 2003
    Location
    Strongsville, Ohio
    Posts
    484

    Default Ford 300 I six engine (working scale model)

    Gentlemen,
    It's been awhile since I posted anything so I'll update you on my current project. I won't post the whole build as it's on another forum but I will give you the highlights of the build so far.
    For this winter's project I wanted to build another engine but this time in a configuration (cylinder count) that I don't have. I decided on an inline six based somewhat on my 4 cylinder engine. While drawing up the plans for it I decided to detail it more so than the 4 cylinder engine. This brought me to the venerable Ford 300 I six.
    Working from just pictures I started creating the drawings. The engine will have a .750 bore and an .875 stroke. It will be water cooled, this time through the block and head. It will have a splash oil system as it has proven itself with the 4 cylinder engine.
    Before cutting any metal I had to see if I could make the required helical gears to drive the distributor from the camshaft. Trying to make this engine more prototypical I would need the distributor mid block. A fellow on one of the other forums came up with a fixture and method to cut these gears. His name is Chuck Fellows. Along with Chuck another gentleman, produced a spread sheet to spit out the required numbers for P.D., tooth counts, etc.
    gbritnell
    http://smg.photobucket.com/user/gbri...b8dc1.jpg.html



  2. #2
    Join Date
    Nov 2009
    Location
    Winchendon MA
    Posts
    767

    Default

    What is the other site I'd like to look at what you've done.

  3. #3
    Join Date
    May 2003
    Location
    Strongsville, Ohio
    Posts
    484

  4. #4
    Join Date
    May 2003
    Location
    Strongsville, Ohio
    Posts
    484

    Default

    Here's a video link to cutting the helical gears.
    gbritnell
    http://youtu.be/blaZ5tz0_6E

  5. #5

    Default

    I demand proof that this is a metal shop and not some artistic rendition of one(not a chip seen!)
    Great work, I thought I was just a wood butcher, add metal to that now
    "Good judgment comes from experience, and often experience comes from bad judgment" R.M.Brown

    My shop tour www.plastikosmd.com

  6. #6
    Join Date
    May 2003
    Location
    Strongsville, Ohio
    Posts
    484

    Default

    ok, so here's the start of the engine machining. First up is the block. It's made from 6061 aluminum. It will have pressed in iron sleeves which will form the water jackets. It started from a block and was whittled away using angle plates and rotary table on the mill. For this engine I have come up with a much easier way to mount the crank. Rather than line boring, which is a royal pain in these smaller sizes, I have machined the bearing areas rectangular and will make the bronze inserts to fit. Naturally the center ones will be split to mount on the crank but the end bearings will be one piece, the rear also being cut for an -O- ring seal. The cam hole was put through when the block was solid thus providing support for the long tools. I have an Autocad drawing program that I use for my drawings and for making step-off charts for a lot of the radiused shapes and features.
    gbritnell




  7. #7
    Join Date
    May 2003
    Location
    Strongsville, Ohio
    Posts
    484

    Default

    The distributor side of the block took the most time. It has all the bosses for the oil filter, fuel pump, motor mounts, dipstick etc. With careful layout and machining all of the shapes were developed and finished. The distributor boss was left for last as it would take a special setup to put the hole in at the proper position and angle for the gears to mesh properly.
    gbritnell




  8. #8
    Join Date
    Sep 2013
    Location
    Jungle-Costa Rica
    Posts
    145

    Default

    2.391 cu.in. ___if my 35 year old formulas in my hard head aren't corrupted.
    .7854 x B x B x S x # of cylinders.
    If your good it'll dyno 3 HP.

    All these years I only THOUGHT I was an engine builder.
    Last edited by Tilaran; 11-04-2013 at 01:37 PM.

  9. #9
    Join Date
    Oct 2013
    Location
    Upstate NY
    Posts
    536

    Default

    Looks nice- I had a 1996 F-150 with the 300 and a stick. Great engine.

    A question: the prototype has a nearly square (slightly oversquare) 4.00 to 3.980 bore/stroke ratio. Why are you going for an undersquare .750 bore and .875 stroke?
    Last edited by CarlByrns; 11-04-2013 at 01:10 PM.

  10. #10
    Join Date
    Oct 2012
    Location
    Walla Walla WA, USA
    Posts
    587

    Default

    that is simply beautiful, what an amazing job! Can't wait to see it finished.

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