1. Enhancement of a Vintage Muscle Car’s Suspension Jonathan Hoffman Advisor: Professor Bucinell http://www.globalwest.net/

2. Background  ‘Muscle’ car era- 1960’s to early 1970’s Produced heavy cars with significant power Other car characteristics were overlooked http://www.matchboxcars.com/

3. 1969 Chevrolet Camaro  Legendary champion in SCCA Trans-Am Series Won 10 of 12 1968 races and championship Won 6 of 12 1969 races and championship http://www.penske.com/ http://www.superchevy.com/

4. Project Objective  Bring the suspension system up to modern standards 35 years of technology  Enhanced Suspension Improved handling capabilities Without sacrificing ride quality http://www.chrysler.com/

5. Sources of improvement  Poor A-arm geometry Excessive positive camber gain  Small front sway bar Minimal roll resistance  Tall springs High center of gravity  Antiquated shocks Poor ride quality http://www.globalwest.net/

6. Suspension Alternatives  MacPherson strut Pros: Inexpensive, compact Cons: High mounting height required, moderate handling  Double A-arm (Wishbone) Pros: Rigid, greatest handling performance Cons: Costly, space engaging http://www.autozine.com/

7. Excessive Positive Camber Gain  Outside tire loses contact with ground during cornering  Caused by poor A-arm geometry http://www.chevyhiperformance.com/

8. Decision Matrix Option 1Option 2Option 3Option 4Option 5Option 6Option 7 Design Criteria Redesigned Upper A-arm Redesigned Upper A-arm w/ remounting Option 1 with Shocks, sway Option 3 with lowered springs Option 2 with Shocks, sway Option 5 with lowered springs New shocks, springs, sway 10 Performance Enhancement77.5898.59.55 weighted score70758090859550 9 Required Modification95874210 weighted score81457263361890 8Ride Quality7787.58 8 weighted score56 6460646064 7Cost108765.557 weighted score7056494238.53549 Totals: 277232265255223.5208253

9. Suspension Modeling Software  WinGeo3  Effects of changes in camber, toe, scrub, roll center, etc. http://www.mitchellsoftware.com/

10. Remaining Tasks  Analyze alternatives with software  Define final design  Manufacture final design  Before / after performance testing http://www.hotrod.com

11. Questions / Acknowledgements ?  Professor Bucinell  William C. Mitchell