| Dimensions |
Front |
Rear |
| Overall Length, Width, Height |
90.0 inches long, 52.0
inches wide, 46.5 inches high |
| Wheelbase |
64.052 inches |
| Track |
46.0 inches |
46.0 inches |
| Weight with 150lb driver |
200 lbs |
300 lbs |
| |
| Suspension Parameters |
Front |
Rear |
| Suspension Type |
Double unequal length A-Arm.
Pull rod actuated vertically oriented spring and damper with anti-roll
bar. |
Satchell linked solid rear axle. Pull rod actuated vertically oriented
spring and damper. |
| Tire Size and Compound Type |
18x6-10 R25A Hoosier |
18x6-10 R25A Hoosier |
| Wheels |
5.5 inch wide, 3-piece,
HiPer Technology |
5.5 inch wide, 3-piece, HiPer Technology |
| Design ride height (chassis to ground) |
4.5 inches |
2.5 inches |
| Center of Gravity Design Height |
12.0 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) |
100 lb/in |
125 lb/in |
| Roll rate (chassis to wheel center) |
1.3 degrees per g |
| Sprung mass natural frequency |
4.00 Hz |
3.66 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 |
1.00 / linear |
1.10 / slight progressive rate on compression (birdcage clocking) |
| Camber coefficient in bump (deg / in) |
0.82 deg / in |
0.0 deg / in (solid axle) |
| Camber coefficient in roll (deg / deg) |
0.70 deg / deg |
-1.00 deg / deg (solid axle) |
| Static Toe and adjustment method |
0.1 deg toe out via adjustment
steering arms |
0.0 inch toe no adjustment (solid axle) |
| Static camber and adjustment method |
-1.5 deg via shim plates
on upright |
0.0 deg no adjustment (solid axle) |
| Front Caster and adjustment method |
0.0 to 5.0 degrees, slots
on A-Arms |
| Front Kingpin Axis |
0.0 degrees non-adjustable |
| Kingpin offset and trail |
2.0 inches offset, 0.0
inches trail |
| Static Ackermann and adjustment method |
Static parallel steer w/
adjustable steering arms |
| Anti dive / Anti Squat |
0.0 / 0.0 |
0.0 / 4.0% |
| Roll center position static |
1.4 inches above ground |
4.5 inches above ground |
| Roll center position at 1g lateral acc |
1.44 inches above ground,
0.5 inches lateral in direction of turn |
4.5 inches above ground, 0.125 inches toward laden side |
| Steer location, Gear ratio, Steer Arm Length |
Rear steer 1.5 inches above
lower A-arm and 1.5 inches behind front wheel centerline, 12 to 1 ratio
Stiletto Rack and Pinion, 2.5 inch steering arm, 6 to 1 wheel rate |
| |
| Brake System / Hub & Axle |
Front |
Rear |
| Rotors |
Floating, Mild Steel, Hub
Mounted, 7 inch diameter, 0.25 inch thick (LF, RF) |
Floating, Mild Steel, Hub Mounted, 7 inch diameter, 0.25 inch thick (On
axle) |
| Master Cylinder |
Tilton 76 series, 0.625"
bore front wheels, 0.625" bore rear wheels, Tilton balance bar |
| Calipers |
1.25 X 4 inch pistons,
opposing piston, GP320 Wilwood (LF, RF) |
1.25 X 4 inch pistons, opposing piston, GP320 Wilwood (On axle) |
| Hub Bearings |
Single D60102RS double
row ball bearing with integral seal (one per upright) |
Single D60102RS double row ball bearing with integral seal (one per birdcage) |
| Upright Assembly |
CNC 7075-Al, integral caliper
mount |
CNC 7075-Al, integral caliper mount |
| Axle type, size, and material |
Sprint car solid axle stub,
1.75" OD x 1.00" ID, 7075-T6 Aluminum, 27-tooth splined |
Sprint car solid axle, 1.75" OD x 1.00" ID, 7075-T6 Aluminum, 27-tooth
splined |
| |
| Ergonomics |
| \
| Driver Size Adjustments |
Fixed steering wheel and
pedals. Small-medium, and large interchangeable seats. |
| Seat (materials, padding) |
6061-T6 Aluminum, shoulder,
ribcage, and hip supports. Small-medium, and large interchangeable seats,
attached to firewall by Velcro. Small-medium size consists of layer of
high-density foam, covered by booster foam for shorter drivers in specific
locations, with added lumbar support. Large size consists of layer of
high-density foam, with added lumbar support. Knee supports. 3" foam adjustable
head support. |
| Driver Visibility (angle of side view, mirrors?) |
220 degree side visibility,
2"x4" side mirrors mounted to front roll hoop |
| Shift Actuator (type, location) |
None because of CVT drivetrain. |
| Clutch Actuator (type, location) |
None because of CVT drivetrain. |
| Instrumentation |
Dash mounted, main power
and ignition power switches and indicator lights, engine start button,
"return to pits" light (yellow), "master alarm" light (red) |
| |
| Frame |
| \
| Frame Construction |
Tubular space frame |
| Material |
4130-N chromoly (alloy
steel) |
| Joining method and material |
GTAW Welding ER80S-D2 filler |
| Targets (Torsional Stiffness or other) |
3500+ ft-lb / deg |
| Torsional stiffness and validation method |
Not tested as of February |
| Bare frame weight with brackets and paint |
65 lbs |
| Crush zone material |
Alcore Dura-Cell 5056 Aluminum Honeycomb, 5.2 lb per cubic ft, 0.25 inch cell, 0.0025 inch wall thickness |
| Crush zone length |
6.5 inches |
| Crush zone energy capacity |
104,000 in-lb (11,750 Joules) |
| |
| Powertrain |
| \
| Manufacture / Model |
2005 Briggs & Stratton
Vanguard |
| Bore / Stroke / Cylinders / Displacement |
75.4mm bore / 66.0mm stroke
/ 2 cylinders / 590 cc | \
| Compression ratio |
10:1 |
| Induction |
Naturally aspirated, acoustically
tuned |
| Throttle Body / Mechanism |
35mm, butterfly throttle
actuation, Bosch TPS |
| Fuel Type |
94 Octane |
| Max Power design RPM |
5000 |
| Max Torque design RPM |
3500 |
| Min RPM for 80% max torque |
2800 |
| Fuel System (manf'r, and type) |
Walbro return less fuel injection, individual injector per cylinder (student designed) |
| Fuel System Sensors (used in fuel mapping) |
Air Temp, TPS, MAP and
Baro sensors (speed density fuel injection system) |
| Fuel Pressure |
43.5 psi, pump flange assembly
regulated |
| Injector location |
4.0 inches before intake port and pointing into intake stream |
| Intake Plenum volume and runner length(s) |
1180 cc / 29 inches |
| Exhaust header design |
Stepped primary tube design, 321 stainless steel, 2 into 1 collector, O2 sensor mounted in collector |
| Effective Exhaust runner length |
31 inches, 15.5 inches of 1.25"x0.065", 15.5 inches of 1.375"x0.065" |
| Ignition System |
Student designed, 2x Denso 580 ignition coils w/ integral igniters, Denso spark plugs |
| Ignition Timing |
MoTec M4, adjustable ignition advance and retard |
| Oiling System (wet/dry sump, mods) |
Stock wet sump, gerotor oil pump, stock forced-air oil cooler and filter assembly |
| 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 |
| Muffler |
Perforated core, stainless scrubble packing, 38 cubic inch |
| Other significant engine modifications |
628 cc de-stroked to 590
cc using 16hp crankshaft, billet aluminum connecting rods, forged aluminum
pistons, titanium valves, high-duration solid lifter cam, aluminum roller
rockers, aluminum push rods, dual ring type CHT sensors, oil pressure
and temperature sensors, Cam and Crank VR sensor, Swain Tech coatings,
ARP fasteners, Cometic steel head gaskets, lightened flywheel, relocated
oil dipstick, utilized flywheel stator as starting mechanism |
| |
| Drivetrain |
|
| Drive Type |
DID 428VM X-ring roller
chain |
| Differential Type |
Solid Axle |
| Final Drive Ratio |
4:1 |
| Vehicle Speed @ max power (design) rpm |
60 mph, 12:1 low gear, 4:1 high gear |
| 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 |
Vacuum-formed 1/8 inch
polyethanol panels, attached with Dzus self-ejecting buttons |
| Special Bit A? |
N/A |
| Special Bit B? |
N/A |
