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IndustryArena Forum > Hobby Projects > I.C. Engines > Blower for The Demon V8
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  1. #41
    Join Date
    Dec 2006
    Posts
    603
    Well I got it done. Tomorrow I will fill the radiator and give the water pump a test run. If all goes well I will finish building the second one for the blower motor.


  2. #42
    Join Date
    Oct 2006
    Posts
    708
    Marvelous miracle of micro machinery!

  3. #43
    Join Date
    Jun 2011
    Posts
    695
    WOW! Great progress. Seems so simple when your doing it.
    Hurco KMB1 Build
    Wholesale Tool 3in1 conversion
    C-Constant
    N-Nonworking
    C-Contraption

  4. #44
    Join Date
    Aug 2013
    Posts
    8
    Well I got it done. Tomorrow I will fill the radiator and give the water pump a test run.

  5. #45
    Join Date
    Dec 2006
    Posts
    603
    Now that the other engines are running good I had time to make some new stuff. I made new carb levers and bolted them to the drums on the carb. The ball screwed into the lever but not flush like I expected. That I can fix. The socket did not pop onto the ball as far as I thought it would. That I cannot fix so I will shorten the lever up to make the adjustment. 5 minute fix, I can handle that. I also have the threaded links made to connect the throttle levers to the pivot dohickeys. I plan to make the base bracket wider so the ball wont hit the blower case. I'm only talking a .050 inch change. Not a big deal. The threaded linkage rods wont screw into the socket real far. That I expected so I cut about half of the length off that piece and it went exactly as I was hoping. The carbs are linked to the main shaft and working together so its progress.


  6. #46
    Join Date
    Dec 2006
    Posts
    603
    Well!, i have made the base bracket that holds the swivel gizmo. This is the thing that will turn horizontal motion into vertical motion. I have one more bracket to make and a few rods and I will have the linkage done.






  7. #47
    Join Date
    Dec 2006
    Posts
    603
    Well that's it for the blower. The linkage is done and working very nice. The plans have 2 changes to them
    so the latest update will be out today with those 2 changes on them. The engine won't be running for a
    while as I still need a crankshaft and all the fixins. I will start on all that early next week if all goes well. I
    have another project that I want to finish and I'll be back.








  8. #48
    Join Date
    Mar 2006
    Posts
    6
    So I am dying to know if you had it running yet?

  9. #49
    Join Date
    Dec 2006
    Posts
    603
    Quote Originally Posted by domino11 View Post
    So I am dying to know if you had it running yet?
    No not yet. I will soon make the crankshaft, rods and pistons. I have all the pieces done to build the heads complete. The base is complete. I still need to make a radiator and fuel tank. There will be some more updates soon.

  10. #50
    Join Date
    Dec 2006
    Posts
    603
    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.


  11. #51
    Join Date
    Dec 2006
    Posts
    603
    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.

  12. #52
    Join Date
    Dec 2006
    Posts
    603

  13. #53
    Join Date
    Mar 2006
    Posts
    6
    Steve,
    That is one nice crankshaft!

  14. #54
    Join Date
    Dec 2006
    Posts
    603
    Thanks Domino. I keep chipping away at it so hopefully it will run for the show in april.

  15. #55
    Join Date
    Dec 2006
    Posts
    603

    Re: Blower for The Demon V8






  16. #56
    Join Date
    Dec 2004
    Posts
    1865

    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.

  17. #57
    Join Date
    Jun 2004
    Posts
    6618

    Re: Blower for The Demon V8

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

  18. #58
    Join Date
    Nov 2007
    Posts
    2151

    Re: Blower for The Demon V8

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

  19. #59
    Join Date
    Dec 2006
    Posts
    603

    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.


  20. #60
    Join Date
    Dec 2006
    Posts
    603

    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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