Register now to get rid of these ads!

Technical Carb--Level with engine --or the World

Discussion in 'Traditional Hot Rods' started by bangerbob, Dec 5, 2014.

  1. bangerbob
    Joined: Jul 2, 2014
    Posts: 161

    bangerbob

    I am building a "Banger"- powered 30 Roadtster making my own intake manifold. Do I need the chassis on the wheels before installing the carb base? Not until then will I know angle of the carb base due to wheels sizes, front axle drop, lowered springs ect. Need to wait?
     
  2. mgtstumpy
    Joined: Jul 20, 2006
    Posts: 9,253

    mgtstumpy
    Member

    I would have it rolling, general rule of thumb is 3 degrees down however OEM banger with transmission and torque tube may be different, 100's of HAMB threads on this subject.
     
  3. cheepsk8
    Joined: Sep 5, 2011
    Posts: 655

    cheepsk8
    Member
    from west ky

    I would wait until I had as much together as possible. Especially ride height and rake. The sheet metal should be fairly balanced and settle everything straight down.
     
  4. F-6Garagerat
    Joined: Apr 12, 2008
    Posts: 2,652

    F-6Garagerat
    Member

    Most intakes are machined at a 3° rake, low in front, high in rear. That way, when the engine/trans are tilted down at the rear for driveline angle the carbs sit level.

    I say most because I had an Edelbrock C355 3x2 that was factory machined at 8° for marine applications. That one was a head scratcher until I saw a really old Edelbrock ad that said "available 8° for marine installations" or something to that affect.
     
    lothiandon1940 likes this.
  5. Mike51Merc
    Joined: Dec 5, 2008
    Posts: 3,855

    Mike51Merc
    Member

    Carb should be level with the world. Engine angle determined by necessary driveline angle. Torque tube setups don't have driveline angles, so engine is level with the world, too.
    Open driveline generally places engine at a 3 degree angle, so carb flange is at 3 degree opposite angle.
     
    lothiandon1940 likes this.
  6. aaggie
    Joined: Nov 21, 2009
    Posts: 2,530

    aaggie
    Member

    You're probably not going to start it until it's a roller so put it all together then see where you are with the carb angle. Even with big and little rubber rake it will probably be OK, if not a few angle shims under the carb and you're good to go.
     
  7. F-6Garagerat
    Joined: Apr 12, 2008
    Posts: 2,652

    F-6Garagerat
    Member

    "Probably be OK"? "Angle shims?? Why not set it up right, from the start, instead of adding a "bandaid" after the fact?
     
  8. Fogger
    Joined: Aug 18, 2007
    Posts: 1,918

    Fogger
    Member

    For your torque tube application make it level with the cylinder head, any angle in the carb base will look weird. Consider that vehicles are seldom level during operation, up and down inclines continually. As others have stated, if you are building a open driveshaft project the transmission down 3 degrees and axle pinion up the same amount is necessary for u-joint operation and not required with the single front u-joint solid mounted rear attachment of a torque tube. IMO it's not necessary for the intake carburetor base to be level to earth, it works just fine if level to the cylinder heads.
     
  9. joseph.peter.carter@us.ar
    Joined: Sep 27, 2008
    Posts: 83

    joseph.peter.carter@us.ar
    Member
    from USA

    I would start with having the carb base at least 3 degrees pointed down toward the rear of the car. I think that should be good enought, I mean how many time are you driving on a 0 degree level road. You are always going up and down hills. With that being said, go with the 3 degrees pointed down toward the rear of the car.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.