Kingpin degree for a dragster and funnycar

Discussion in 'PSI Superchargers Tech Questions' started by willy200, May 1, 2015.

  1. willy200

    willy200 Member

    Joined:
    May 26, 2008
    Messages:
    318
    Likes Received:
    0
    What would be a typical kingpin degree angle for a TAD Dragster and a TAFC Funnycar
     
    #1
    willy200, May 1, 2015
  2. afueldigger

    afueldigger tire wiper

    Joined:
    Mar 14, 2004
    Messages:
    198
    Likes Received:
    0
    are you asking for king pin angle ( built into the spindle) or caster angle?
    Gary
     
    #2
    afueldigger, May 1, 2015
  3. willy200

    willy200 Member

    Joined:
    May 26, 2008
    Messages:
    318
    Likes Received:
    0
    Sorry the Caster angle is what i was enquiring about
     
    #3
    willy200, May 1, 2015
  4. OwnBlock

    OwnBlock Member

    Joined:
    Jun 12, 2006
    Messages:
    238
    Likes Received:
    3
    10 to 15* works fine, the more degrees you use the greater the risk of a wheel "locking" rocking over whilst turning too tightly when pushing the car around, added to the fact if too much, easy to lose control while driver is backing up after the burnout.
    See the clip on youtube of the injected nitro FED with far too much - backed up - car just turned then driver hit the forward selector then the gas pedal, it is very nasty.

    Check out the caster angle its layed way back.

    Personally I like 12 - 14* ( Dragster ) Every and all cars regardless of what it is, I also use the "akerman" principal.

    :cool::)
     
    #4
    Last edited: May 5, 2015
    OwnBlock, May 5, 2015
  5. comp altered 632

    comp altered 632 New Member

    Joined:
    Jan 8, 2016
    Messages:
    20
    Likes Received:
    2
    I use 12 degree caster .and 1/8 inch toe in measured at widest part of tyre,this makes toe zero as wind stresses a-arms on run. akerman you don't want as you are trying to go straight you want to keep front wheels parallel
    And they stay pointing down track as the back end steps out
     
    #5
    comp altered 632, Jan 8, 2016
  6. OwnBlock

    OwnBlock Member

    Joined:
    Jun 12, 2006
    Messages:
    238
    Likes Received:
    3
    ackerman has been my friend on all my drag race cars since 1972, short or long wheel base, and Ive built a lot, when they step out easy to control
     
    #6
    OwnBlock, Jan 8, 2016
  7. No Limit

    No Limit New Member

    Joined:
    Mar 18, 2008
    Messages:
    5
    Likes Received:
    0
    On a funny car, reducing the angle to 5 or 7 degrees will make it much easier to steer, and less likely to get the wheel wobble when you are backing up.
     
    #7
    No Limit, Feb 25, 2016
  8. NITROBANDIT1

    NITROBANDIT1 LOST IN SPACE

    Joined:
    Apr 18, 2005
    Messages:
    653
    Likes Received:
    2
    the car I just picked up had 10degrees of caster, 8.5 degrees of kingpin using strange adjustable height spindles . funny car
     
    #8
    NITROBANDIT1, Feb 25, 2016
  9. comp altered 632

    comp altered 632 New Member

    Joined:
    Jan 8, 2016
    Messages:
    20
    Likes Received:
    2
    Akerman is dangerous on a drag racing vehicle.
    I use no akerman therefore as the back of the car steps out and you put steering in the front wheels will always be parallel and both pointing the same way ( hopefully straight down track )
     
    #9
    comp altered 632, Jan 22, 2020
  10. Bob Meyer

    Bob Meyer Comp Eliminator

    Joined:
    May 13, 2003
    Messages:
    766
    Likes Received:
    39
    Greg; every dragster I built in the last 40 years were 24 caster (must twist the steering arms to level with 3/16" toe in)
    F/C 9 degree, also twist arms, but not as necessary as the rod ends won't bottom out and bend the male end.
     
    #10
    Bob Meyer, Jan 28, 2020
    aafa760, Will Hanna and Fuel Cars like this.
  11. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
    Staff Member

    Joined:
    May 6, 2003
    Messages:
    6,706
    Likes Received:
    133
    I have had two very experienced TAD pilots (one with multiple championships) tell me the cars with more caster angle drive much better. this was based on driving two different cars in the same year, one with lower angle and one with higher.
     
    #11
    Will Hanna, Jan 28, 2020

Share This Page





XenPorta 2 PRO © Jason Axelrod from 8WAYRUN.COM