| Dimensions |
Front |
Rear |
| Overall Length, Width, Height |
87.8 inches long, 54.0
inches wide, 39.5 inches high |
| Wheelbase |
65.504 inches |
| Track |
46.0 inches |
44.0 inches |
| Weight with 150lb driver |
250 lbs |
300 lbs |
| |
| Suspension Parameters |
Front |
Rear |
| Suspension Type |
Double unequal length non-parallel A-arm. Directly actuated. |
Satchell Linked Solid Rear Axle, Pull Rod Actuated Spring and Damper |
| Tire Size and Compound Type |
18x6-10 R25B Hoosier |
18x6-10 R25B Hoosier |
| Wheels |
6 in contact patch, Bias Ply |
6 in contact patch, Bias Ply |
| Center of Gravity Design Height |
11.5 inches above ground |
| Suspension design travel |
1.25 inches jounce / 1.25
inch rebound |
1.25 inches jounce / 1.25 inch rebound |
| Wheel rate (chassis to wheel center) |
125 lb/in |
135 lb/in |
| Roll rate (chassis to wheel center) |
0.8 degrees per g |
| Sprung mass natural frequency |
2.75 Hz |
2.50 Hz |
| Jounce Damping |
Not tested as of February |
Not tested as of February |
| Rebound Damping |
Not tested as of February |
Not tested as of February |
| Motion ratio / type |
0.75:1 Linear |
1.1:1 Linear |
| Camber coefficient in bump (deg / in) |
1.60 deg / in. |
0 deg / in. (solid axle) |
| Camber coefficient in roll (deg / deg) |
0.55 deg / deg |
0 deg / deg (solid axle) |
| Static Toe |
0 deg. |
0 deg. |
| Static camber and adjustment method |
Toothed uprights |
0.0 deg no adjustment (solid axle) |
| Front Caster and adjustment method |
Toothed A-arms |
|
| Front Kingpin Axis |
0 deg. |
|
| Kingpin offset and trail |
1.9 in. lateral offset, 1.0 in. Mechanical Trail |
|
| Static Ackermann and adjustment method |
Replaceable steering arms for adjustment |
|
| Anti dive / Anti Squat |
0% / 0% |
0% / 4% |
| Roll center position static |
1.0 inches above ground |
4.5 inches above ground |
| Roll center position at 1g lateral acc |
0.91 inches above ground |
4.49 inches above ground |
| Steer location, Gear ratio, Steer Arm Length |
Front Steer, 1.0 in. forward of kingpin axis, 3.5 in. steer arm |
| |
| Brake System / Hub & Axle |
Front |
Rear |
| Rotors |
7.76 in. |
7.76 in. |
| Master Cylinder |
Tilton 75 Series 5/8" |
| Calipers |
Wilwood PS1 |
Wilwood PS1 |
| Hub Bearings |
Double Row Angular Contact 80x50x32 |
Single Row Deep Groove 80x50x16 |
| Upright Assembly |
CNC 6061 T6 |
CNC 6061 T6 |
| Axle type, size, and material |
Custom Splined 1.75" OD, 7075-T6 Aluminum |
Sprint car solid axle, 1.75" OD, 7075-T6 Aluminum |
| |
| Ergonomics |
|
| Driver Size Adjustments |
Interchangaeble lateral support |
| Seat (materials, padding) |
One-piece compostie seat pan |
| Driver Visibility (angle of side view, mirrors?) |
180 degree side visibility |
| Shift Actuator (type, location) |
None because of CVT drivetrain. |
| Clutch Actuator (type, location) |
None because of CVT drivetrain. |
| Instrumentation |
Wideband O2, Oil Temperature, Oil Pressure |
| |
| Frame |
|
| Frame Construction |
Tubular space frame |
| Material |
4130 chromoly |
| Joining method and material |
GTAW Welding ER80S-D2 filler |
| Targets (Torsional Stiffness or other) |
1500 ft-lb / deg |
| Torsional stiffness and validation method |
1600 lb-ft/deg |
| Bare frame weight with brackets and paint |
67 lbs |
| Crush zone material |
Composite shell; Carbon Fiber, Kevlar |
| Crush zone length |
7.0 inches |
| Crush zone energy capacity |
5590.9 ft-lb |
| |
| Powertrain |
|
| Manufacture / Model |
2005 Briggs & Stratton Vanguard 90° V-Twin |
| Bore / Stroke / Cylinders / Displacement |
75.4mm bore / 66.0mm stroke
/ 2 cylinders / 590 cc |
| Compression ratio |
11.99:1 |
| Induction |
Naturally Aspirated, Acoustically Tuned |
| Throttle Body / Mechanism |
35mm Butterfly Throttle Body with Bosch TPS |
| Fuel Type |
100 Octane |
| Max Power design RPM |
6000 |
| Max Torque design RPM |
4500 |
| Min RPM for 80% max torque |
1750 |
| Fuel System (manf'r, and type) |
Student Designed: Walbro Return-less Fuel Injection, Individual Injector per Cylinder |
| Fuel System Sensors (used in fuel mapping) |
Air Temp, TPS, MAP and Baro Sensors (Speed Density Fuel Injection System) |
| Fuel Pressure |
43.5 psi |
| Injector location |
76.2mm before port, 30 Degrees Off Fluid Stream |
| Intake Plenum volume and runner length(s) |
904 cc / 14.1 inches |
| Exhaust header design |
2 into 1 Merge Collector |
| Effective Exhaust runner length |
52 in. |
| Ignition System |
Student designed: 2x Denso 580 ignition coils w/ integral igniters, Denso spark plugs |
| Ignition Timing |
MegaSquirt II with Adjustable Ignition Advance and Retard |
| Oiling System (wet/dry sump, mods) |
Stock Wet Sump, Gerotor Oil Pump, Stock Forced-Air Oil Cooler, Aftermarket Oil Filter Adapter |
| Coolant System and Radiator location |
Forced air cooled w/ squirrel cage blower and ducting shrouds |
| Fuel Tank Location, Type |
Chassis Mounted between Firewall and Engine, Centerline of Car, Aluminum Tank, 1 Gallon Capacity |
| Muffler |
Supertrapp IDS2 16" Muffler with Quiet Core |
| Other significant engine modifications |
628 cc De-stroked to 590 cc Using 16hp Crankshaft, Eagle Billet Aluminum Connecting Rods, Eagle Forged Aluminum Pistons, Big Bore Heads with Titanium Valves, Eagle V-280 High-Duration Solid Lifter Cam, Eagle Aluminum Roller Rockers, Eagle Aluminum Push Rods, Oil Pressure and Temperature Sensors, Crank VR Sensor, Cometic Steel Head Gaskets, ARC Racing Aluminum Flywheel, Relocated Oil Dipstick |
| |
| Drivetrain |
|
| Drive Type |
428 Sealed O-Ring Chain |
| Differential Type |
Solid Axle |
| Final Drive Ratio |
3.92:1 |
| Vehicle Speed @ max power (design) rpm |
83 mph, High Gear: 13.2:1, Low Gear: 3.3:1 |
| 1st gear |
None because of CVT driverain. |
| 2nd gear |
None because of CVT drivetrain. |
| 3rd gear |
None because of CVT drivetrain. |
| 4th gear |
None because of CVT drivetrain. |
| 5th gear |
None because of CVT drivetrain. |
| 6th gear |
None because of CVT drivetrain. |
| Half shaft size and material |
Sprint car solid axle, 1.75" OD x 1.00" ID, 7075-T6 Aluminum |
| Joint type |
N/A |
| |
| Aerodynamics (if applicable) |
|
| Front Wing (lift/drag coef., material, weight) |
N/A |
| Rear Wing (lift/drag coef., material, weight) |
N/A |
| Undertray (downforce/speed) |
N/A |
| Wing mounting |
N/A |
| |
| Optional Information |
|
| Body Work |
3 Piece Carbon Fiber Bodywork |
| Special Bit A? |
Integrated Launch Control System |
| Special Bit B? |
N/A |
