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Projects Toymaker's Twin Engine Dragster Build

Discussion in 'The Hokey Ass Message Board' started by Toymaker, Nov 22, 2010.

  1. Toymaker
    Joined: Mar 26, 2006
    Posts: 3,920

    Toymaker
    Member
    from Fresno,CA

    With a HAMB Dragster under our belt http://www.jalopyjournal.com/forum/showthread.php?t=246970 and our on going Eagle Field C/Gas Dragster build close to completion http://www.jalopyjournal.com/forum/showthread.php?t=430809 I'm gonna dive into a project I've wanted to do for a while.

    As far back as talking to Eddie Hill in the early 90's I've had this build in the back of my head.

    [​IMG]
    [​IMG]
    [​IMG]

    My original plan was to try to be NHRA Legal by using 2 approved bellhousings, but with Eagle Field happening I'm going the more economical route.

    [​IMG]

    The build is going to use 2 small block Chevy's side by side with the flywheels (having 2 ring gears installed and pinned on each) will be mated directly together much like this but with both my engines facing forward.

    [​IMG]

    One engine will be reverse rotation which is a hurdle I solved by aquiring an old Chris Craft Cam and drive......

    [​IMG]

    I positioned 2 engines side by side on the ground.........

    [​IMG]

    And determined that I'll use 168t flywheels with one covered by a Mercruiser bellhousing and the standard rotation engine which will carry the clutch (direct drive) using a scattershield.

    [​IMG]

    The car will use a narrow pair of Hurst Hot Rod Rubber to get the direct drive car off the line in a plume of smoke I hope:D

    [​IMG]

    I have visions of this wheel and tire combo on the rear but with finances being what they are I'll probably use some Chrome reverse wheels I have.

    [​IMG]

    Up front I'll use my Harley Davidson 16" wheels that currently reside on the front of our HA/GR.

    [​IMG]
    All of this will have a basic 3x2 frame design
    With a Large Radius 5 point cage simular to the old Dragmaster chassis'
    [​IMG]
    More to come as I'd like to to have the car on display if not running by May 21st! Rocky

     
    Last edited: Mar 4, 2013
  2. 94hoghead
    Joined: Jun 1, 2007
    Posts: 1,290

    94hoghead
    Member

    Awesome idea! Going to be great!
     
  3. lippy
    Joined: Sep 27, 2006
    Posts: 4,033

    lippy
    Member
    from Ks

    Double trouble. :D You are going to use stickshift flywheels right?:) Hey how about two 6cyl chevy's? Cool build anyway.
     
  4. Wow Roc, I'm kinda iffy on the ring gear setup, how about a four row chain or something more substantial? into an in an out box..............but like the thinking......
     
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  5. This is going to be good!
     
  6. KING CHASSIS
    Joined: Aug 28, 2005
    Posts: 1,864

    KING CHASSIS
    Member

    Cool stuff you have going on there!!

    The twin is something I would like to do someday too. Bill Bierman (Suciede King AWB Stude) talks about it all the time. I wish he would pull the trigger.

    Good luck on your project. From the looks of your other projects I believe your May 21st goal will be obtained no problem. Now back in the shop, for both of us. ha,ha
     
  7. doctorZ
    Joined: Apr 10, 2006
    Posts: 1,243

    doctorZ
    Member

    aaaaaand i'm subscribed.
     
  8. twin blowers?

    What sort of wheelbase?

    fun,

    fun,

    fun.....

    Cheers,

    Drewfus:D
     
  9. Ron Mayes
    Joined: Mar 24, 2006
    Posts: 696

    Ron Mayes
    Member

    About 15 years ago i bought a dragster with the same setup.. twin chevys and injectors, welded cans ....Awesome work on the motors and clutch cans ...but the chassis was a shit box :D
     
  10. LeadSledMerc
    Joined: Nov 29, 2003
    Posts: 4,105

    LeadSledMerc
    Member

    Awesome ideas going...don't stop sharing them now!!! :D
     
  11. Royalshifter
    Joined: May 29, 2005
    Posts: 15,335

    Royalshifter
    Moderator
    from California

    Ha ha this will be good.....glad you are going for it.
     
  12. lawman
    Joined: Sep 19, 2006
    Posts: 2,667

    lawman
    Member

    Thats very nice. Please post more as you go !!!!! Tom (Tired Old Man)
     
  13. Sounds really cool. I have a question though....don't the cam specs have to be pretty close and the tunes have to be close for each engine? Since the flywheel will be acting as a link between both engines, what if one engine is stronger than the other? Could them being 'off-balance' mess things up?

    Are the flywheel teeth really meant to handle 5-6,000 RPMs or will the teeth break off?

    I'm not speaking from any experience...just wondering how the physics of two engines being linked together works out.
     
  14. guitar man
    Joined: Sep 13, 2010
    Posts: 210

    guitar man
    Member
    from Tulsa OK

    Woot!!! Subscribed :D

    Am I seeing that right, one engine driving each rear wheel? In that case I understand meshing the engines together, because if they were each running free and one engine crapped out while the other was running wfo it seems like that would not be good at all :eek:
     
  15. Katuna
    Joined: Feb 25, 2005
    Posts: 1,809

    Katuna
    Member
    from Clovis,Ca.

    That's crazy insane Rocky! I gotta agree though, that flywheel setup looks like shakey puddin'. I agree with Carl on the chain drive. However you do it you will be freakin' awesome.

    Is that going to be the t-shirt art for Dragway Reunion II?
     
    Last edited: Nov 23, 2010
  16. Dude... I so want to build a dual engine digger some day...

    You're livin' the dream!

    Sam
     
  17. INJUNTOM
    Joined: Jun 11, 2006
    Posts: 548

    INJUNTOM
    Member

    Looks dangerous :D
     
  18. K and K
    Joined: Sep 17, 2010
    Posts: 127

    K and K
    Member

  19. Toymaker
    Joined: Mar 26, 2006
    Posts: 3,920

    Toymaker
    Member
    from Fresno,CA

    Cars were built using this method in the day (Flywheel to Flywheel) and the Dragmaster Two Thing uses this method also, although they are using flexplates I believe. My plan is to use Certified Flywheels for strength and as far as "Engine Balance" there have been different engines tied together with success. The twin pumkin idea would have had the 2 carriers tied together using the axles. One axle into one side of one spool and the other axle would go thru its spool and into the the remainig side of the other. The long axle would have splines at the end and in the middle, axles would be pretty costly and with 2 of everything pretty heavy. So I'm going with the one pumkin idea, If nothing else we'll find out together:D
    As far as the chassis goes it's going to be a short car, a Kieth Tardel chassis would be the ticket but I have the material to build a 120" wheelbase and with the engines set way back (no trans) it should look really cool, plus I'm not trying to do a tribute car. The intake system is a biggy, ultimately (2 sets of) tubes is what I want, that will be a hold up.
    All I know is I can't wait to see what happens when I drop the hammer on this beast:D
     
  20. Ga55er
    Joined: Aug 6, 2010
    Posts: 73

    Ga55er
    Member
    from Texas

    I'm thinking a little more homework is required. Twin engine helicopters input to one transmission through a differential.
     
  21. Toymaker
    Joined: Mar 26, 2006
    Posts: 3,920

    Toymaker
    Member
    from Fresno,CA

    Last edited: Nov 23, 2010
  22. Ron Mayes
    Joined: Mar 24, 2006
    Posts: 696

    Ron Mayes
    Member

  23. rooman
    Joined: Sep 20, 2006
    Posts: 3,698

    rooman
    Member

    The Odd Couple AA/GD used a small block Chevy and a hemi Chrysler linked together (in line) and that worked out OK as the car won a number of races. I presume that it was linked with a double row chain like the Freight Train and that set up is probably no stronger than the ring gear connection.
    If the ring gear teeth can take the shock of the starter trying to crank over a big inch high compression motor with a bunch of ignition lead they should be OK in this situation.

    Roo
     
  24. rooman
    Joined: Sep 20, 2006
    Posts: 3,698

    rooman
    Member

    Pay attention, this is not new technology and has been done before numerous times (Ivo, Dragmaster etc)

    Roo
     
  25. Jimv
    Joined: Dec 5, 2001
    Posts: 2,927

    Jimv
    Member

    How are you going to change the center spark plugs?!lol
    JimV
     
  26. paintcan54
    Joined: Oct 27, 2007
    Posts: 1,100

    paintcan54
    Member

    Looks like a good project. I'll be watching.
     
  27. Racrdad
    Joined: Jul 27, 2007
    Posts: 1,208

    Racrdad
    Member

    On man, this sounds good! You gotta have a build thread going on this one.
     
  28. kma4444
    Joined: Sep 24, 2008
    Posts: 197

    kma4444
    Member

    Too cool, love the basic engineering. Not enough of that around in racing anymore. Subscribed
     
  29. fab32
    Joined: May 14, 2002
    Posts: 13,988

    fab32
    Member Emeritus

    Disassemble the car silly.:D

    Frank
     

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