Blower for The Demon V8 - Page 5

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Thread: Blower for The Demon V8

  1. #49
    Member stevehuckss396's Avatar
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    Well I have the easy part done. The throws are the worst part and I am not looking forward to it.




    I am going to try the George Britnell method so I started making a fixture to hold the crank for milling operations. Once complete I can pre-mill the throws so there will be alot less to remove on the lathe. The fixture looks big but I made it work for a future project.





  2. #50
    Member stevehuckss396's Avatar
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    I started making a new crankshaft. I have made 2 changes to my process to try to get better results. I was getting some major chatter. The crankshaft has a front shaft a little over an inch long and a tail shaft more than 2 inches long. Those diameters are at there largest .250 inches. To increase rigidity I made some blocks for the ends with the centers drilled in them that those shafts can slide into and take out the flex. I also changed my tooling. The accepted way to grind tools is to grind a small relief in the center of a parting tool to create a forked tongue in the end. I took a .094 wide parting blade and ground a right hand tool on one end and a left hand tool on the other. I machined the mains and both ends to spec between centers. Then the blocks were installed and the throws were cut in the mill and finished in the lathe one at a time. Absolutely no chatter at all and super nice finish on everything. I suppose I had about 10 hours in the shaft when I went out this morning to finish the last throw. I put the shaft in the vise in the wrong orientation and cut about half way thru the last throw before I realized what I did. Everything was working perfectly except my brain. Tomorrow I start my third!!! I think this is karmas punishment for not taking pictures to post.



  3. #51
    Member stevehuckss396's Avatar
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    Steve,
    That is one nice crankshaft!



  5. #53
    Member stevehuckss396's Avatar
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    Thanks Domino. I keep chipping away at it so hopefully it will run for the show in april.



  6. #54
    Member stevehuckss396's Avatar
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    Default Re: Blower for The Demon V8









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    Default Re: Blower for The Demon V8

    Awesome work Steve.
    Mike

    Warning: DIY CNC may cause extreme hair loss due to you pulling your hair out.


  8. #56
    Gold Member LeeWay's Avatar
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    Default Re: Blower for The Demon V8

    Okay. Front engine mount? How do you bend your tube?
    Very cool project.

    Lee


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    Default Re: Blower for The Demon V8

    Extraordinary work!
    I have followed this hoping for more updates
    Thanks for posting
    md



  10. #58
    Member stevehuckss396's Avatar
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    Default Re: Blower for The Demon V8

    I hit the first milestone of the project today. All of the tubing work is done on the chassis. I have put 53 feet of material into it. 43 foot 5/16, 9 foot of 1/4, 1 foot of 3/16, and one foot of 7/32 tubing so far. I still need to attach brackets and stuff like shock mounts and A-arm mounts, stuff like that.









    Here is what we call at work the bone pile. there are a million little 1/4 inch pieces laying around that I didn't gather up but not a whole lot wasted i thought.





  11. #59
    Member stevehuckss396's Avatar
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    Default Re: Blower for The Demon V8

    Quote Originally Posted by LeeWay View Post
    Okay. Front engine mount? How do you bend your tube?
    Very cool project.
    The tubing is heated to red hot and quenched to soften it. Then it can be bent in a standard tubing bender. I don't use the hobby store tubing because the walls are too thin (.014). I order from McMaster Carr. They have heavy wall (.032) tubing that works well and is also heavy enough to handle the end being machined with an endmill to mate it to another tube.

    Front motor mount?




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    Default Re: Blower for The Demon V8

    Work of art. Just Awesome. Thanks for sharing



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