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Whiteline Flatout Tech Training May 2009
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Whiteline Flatout Tech Training May 2009

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Whiteline Flatout talks about performance suspension tech and setup. Covers the major topics including grip amd more grip and how to get it. Using WALK, ROCK and roll control systems to improve …

Whiteline Flatout talks about performance suspension tech and setup. Covers the major topics including grip amd more grip and how to get it. Using WALK, ROCK and roll control systems to improve performance. Prepared by Whiteline Jim to help customers understand the important relationship between grip and handling.


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  • 1. Give me the facts. May 2009
  • 2. BASICALLY WE ARE DEALING WITH GRIP AND BETTER GRIP , MEANS BETTER HANDLING AND BETTER HANDLING, MEANS BETTER PERFORMANCE
  • 3. The aim of a suspension system is to keep as much of the tyre in contact with the road when turning, braking and even driving in a straight line. It is both the beginning and end of all that happens in suspension and chassis design.
  • 4. “R” Spec Tyre And High Performance Street Radial Whiteline products will typically achieve a 0.02 to 0.10 lateral G increase
  • 5. SWAYBARS
  • 6. PROVEN „GRIP‟ DATA 0.025g gain = 18% increase in max. sustainable corner speed
  • 7. HOW MANY SPRINGS DO EVERYDAY VEHICLES USE?
  • 8. SWAY BARS A sway bar is a torsion spring that resists body roll motions.
  • 9. SWAY BARS HAVE 2 MAIN FUNCTIONS: TO REDUCE VEHICLE BODY LEAN TO LIMIT AND TUNE UNDERSTEER & OVERSTEER
  • 10. SWAY BARS & DESIGN Motion ratio changes the leverage and effective rate/ stiffness of the sway bar at the wheel This rate/ stiffness of an anti-roll bar is based on • its diameter, • the stiffness of the material, • the inverse of the length of the lever arms (i.e., the shorter the lever arm, the stiffer the bar). • the geometry of the mounting points, • and the rigidity of the bar's mounting points.
  • 11. SWAY BARS Adjustable sway bars allow their stiffness to be altered by increasing or reducing the length of the lever arms. This permits the roll stiffness to be tuned for different situations without replacing the entire bar. The stiffer the bar, the more force required to move the left and right wheels relative to each other. This increases the amount of force required to make the body roll. WHITELINE OFFERS A WIDE RANGE OF ADJUSTABLE SWAY BARS
  • 12. SWAY BARS ADJUSTABLE SWAY BARS Basically the centre setting represents the published sway bar diameter size Each change in setting represents a „rule of thumb‟ diameter change of +/- 1mm IMPORTANT Initially set the link at the centre or softest setting to allow driver to become accustom to the larger sway bar and then tune to preferred setting and also set front and rear bars similarly.
  • 13. UNDERSTEER FRONT & ALL WHEEL DRIVE
  • 14. OVERSTEER understeer REAR WHEEL DRIVE
  • 15. BARS on CARS The simple swaybar guide to better handling: FWD – increase the rear sway bar size RWD – increase the front sway bar size 4WD – increase rear then front bar size AWD – increase rear then front bar size
  • 16. Before and after…. YouTube - Whiteline swaybar slalom test using 4x4
  • 17. BRACING No such thing as too much chassis stiffness, as it: 85 part # Reduces body flex Maintains camber settings Maintains spring rate Maintains ride quality Looks good!!!!
  • 18. STRUT TOWER BRACING KSB790 – Quick release clamps
  • 19. UNDERCAR BRACING KBR15 – Mount support brace
  • 20. ALIGNMENT KITS
  • 21. ALIGNMENT SETTINGS WHAT ARE THE BEST ONES? The simple answer is that there is no such thing! It is a dynamic process with the quot;correct valuequot; varying from: driver to driver, car to car, driving environment.
  • 22. CAMBER, CASTER & TOE KITS Designed to provide drivers with tune ability Adjustable control arms Adjustable bush kits Adjustable toe arms Camber bolts Offset bush kits
  • 23. ANTI GEOMETRY • “Anti” features in suspension systems are a characteristic that can be used to influence the stiffness of the front or rear suspension under traction forces (under braking or accelerating). • In the front suspension there may be levels of anti-dive during braking and anti-lift during accelerating (assuming traction to the front wheels is present), similarly in the rear there could be anti lift during braking and anti-squat during acceleration.
  • 24. ANTI LIFT KITS Whiteline created this category globally: Also known as a WALK Adds positive caster Minimise lift under acceleration Steering precision gains See a WALK in action on YouTube Whiteline Anti Lift Kit KCA316 VAG Mk5 platform
  • 25. ROLL CENTRE The roll center of a vehicle is the notional point at which the cornering forces in the suspension are reacted to the vehicle body.
  • 26. STANDARD
  • 27. LOWERED 30mm
  • 28. ROCK FITTED
  • 29. KCA313 ROCK suits most popular Impreza, WRX, Sti and Legacy
  • 30. BUMP STEER • Bump Steer is when your wheels steer themselves without input from the steering wheel. • This undesirable toe change is caused by normal suspension movement. • The end result is compromised steering precision
  • 31. KCA313 ROCK suits most popular Impreza, WRX, Sti and Legacy
  • 32. ROLL CENTRE KIT Most vehicles front roll geometry actually encourages roll the lower you go Also known as a ROCK Reduces understeer Maintains optimum camber angles Induces better front end grip
  • 33. ROLL CENTRE KIT KCA395 ROCK suits Lancer EVO VII-VIII-IX-X See a KCA395 ROCK in action on YouTube Whiteline KCA395 ROCK on the EVOX
  • 34. TRACTION CONTROL Voiding in the rear bushes allows the rear cradle to change the suspension alignment dynamically allowing toe angle changes to the rear suspension during cornering. Large cross member misalignment and movement can be noticed and observed during hard constant cornering, giving a sensation of the rear end squirming around. By fitting inserts into the voiding, dramatically reduces the effect of this and allows a more positive feel from the rear end during cornering.
  • 35. TRACTION CONTROL KDT902 Positive Traction Kit suits MY08 WRX and STi See a KDT902 in action on YouTube Whiteline KDT902 (W0598) WRX STi MY08 positive traction kit
  • 36. AGAIN, WE”RE DEALING WITH GRIP AND BETTER GRIP , MEANS BETTER HANDLING AND BETTER HANDLING, MEANS BETTER PERFORMANCE
  • 37. WHITELINE CATALOGUE EDITION 4.1 CURRENTLY AVAILABLE
  • 38. NEW WHITELINE WEBSITE LAUNCED MAY 2009
  • 39. TUNING GUIDE
  • 40. TECH INFO Press releases Regular updates via email New product bulletins FAQ support section on website Extensive suspension technical papers online Whiteline product & vehicle media on YouTube Outcome focus and direct marketing
  • 41. WE LIKE TO HELP Hear what he has to say and ask for help http://www.whiteline.com.au/whiteline_jim.php Follow him on Twitter http://twitter.com/WHITELINEJIM
  • 42. ... AND INFORM
  • 43. TALKED ABOUT
  • 44. TESTING TRACK DAYS– WAKEFIELD RACEWAY - GOULBURN
  • 45. ALWAYS DEALING WITH GRIP AND BETTER GRIP , MEANS BETTER HANDLING AND BETTER HANDLING, MEANS BETTER PERFORMANCE