copyright kaz technologies 2012 · to make car move at sprung mass resonance observe visually...
TRANSCRIPT
![Page 1: Copyright Kaz Technologies 2012 · To make car move at Sprung Mass Resonance Observe visually Analyze data Fix pitch, then heave May have to adjust spring rates ... Race Car Vehicle](https://reader034.vdocuments.site/reader034/viewer/2022042121/5e9abc5b937d8c7c047cb3ee/html5/thumbnails/1.jpg)
Copyright Kaz Technologies 2012
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• Jim Kasprzak • 36 years racing experience
• Developed 7-post testing for GM Racing
• Currently Race Engineer for SRT Viper
• Expertise includes:
– Race Engineering
– 7 post testing
– Suspension Engineering
– Shock design, development, & tuning
– Vehicle Tuning
• 31 years automotive experience
– Arvin Ride Control
• Director, Original Equipment Engineering
• Director, New Product Development
– Monroe Auto Equipment
• Chief Engineer, Electronic Systems
• Manager, Suspension System Programs
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Copyright Kaz Technologies 2012
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Copyright Kaz Technologies 2012
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• Vehicle Setup
• Damper fit check
• Suspension Setup
• Setup Sheet
• Checklists
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Make sure shocks fit correctly!
– Correct travels
• Shock and spring
– Check jounce bumper engagement
– No binding or interferences
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Must properly position shock at ride height
• Typically mid stroke at ride height
• Determine shock travel on track
– Use data acquisition
• Check for bottoming/topping
– Use travel indicator on shock rod
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Copyright Kaz Technologies 2012
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Event Information
Chassis Information
Gearbox Information
Aero Information
Session Tabs
Packer Gap
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Copyright Kaz Technologies 2012
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Speed
Throttle & Brake
Understeer
VyDot
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Steering
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Steering
Throttle
Damper
Displacement
Damper
Velocity
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Rear Shocks
Steering
Throttle Brake
Understeer
Jounce Bumper Engagement
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Front Roll Gradient (1.34) Rear Roll Gradient (1.4)
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• Vehicle Setup
• Run Log
• Basic handling
• Damper tuning
• More advanced tuning
• Test summary
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Event Information
Chassis Information
Gearbox Information
Aero Information
Session Tabs
Packer Gap
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Session Information
Tire Data
Driver Comments
Changes
Tire Info
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Session
Information
Tire Data Driver
Comments
Changes
Setup Info
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Lap Times
Data
Analysis
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Copyright Kaz Technologies 2012
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Copyright Kaz Technologies 2012
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To make car move at Sprung Mass Resonance
Observe visually Analyze data
Fix pitch, then heave May have to adjust spring rates
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Steering
Throttle
Left Damper
Right Damper
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Steering
Throttle
Left Damper
Right Damper
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Rear Shocks
Steering
Throttle Brake
Understeer
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Copyright Kaz Technologies 2012
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To make wheels resonate or bounce
Observe visually Analyze data
More AND less compression More AND less rebound
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Copyright Kaz Technologies 2012
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Copyright Kaz Technologies 2012
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Copyright Kaz Technologies 2012
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Stable? Yes, No
Neutral, Understeer or Oversteer?
Neutral, Understeer or Oversteer?
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Bleed brakes Toes even side to side?
Rear bumpsteer Rear toe
More rear toe for increased stability
Front bumpsteer Front toe
Front toe-in for stability
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Too much front spring? Too much front compression? Front toe out
Less front spring Softer front anti-roll bar
More rear toe Softer rear anti-roll bar Less rear spring
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Softer rear anti-roll bar Less rear spring Less rear damping Rear camber
Less front spring Softer front anti-roll bar More caster More front camber
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http://www.facebook.com/Kaz.Technologies
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Engineer In Your Pocket Tune to Win Drive to Win Prepare to Win Engineer to Win Nuts, Bolts, Fasteners & Plumbing Handbook
Race Car Vehicle Dynamics William F. Milliken and Douglas L. Milliken
Fundamentals of Vehicle Dynamics
Thomas D. Gillespie Shock Absorber Handbook
John C. Dixon
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