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ANATOMY OF AN INDYCAR SERIES DALLARA
Front Wing:
The front wing works in conjunction with the rear wing to create aerodynamic downforce and balance between the front and the rear of the car. There are two different front wing configurations: speedway and short oval/road course. The front wing can be adjusted during a race to improve handling.
Rear Wing:
The rear wing works in conjunction with the front wing to create aerodynamic downforce and balance between the front and the rear of the car. There are three different rear wing configurations: superspeedway, intermediate tracks and short ovals/road courses.
Chassis:
The central part of the car, including the driver’s compartment. The chassis is constructed of carbon fiber with an aluminum honeycomb core. As the frame of the car, the chassis houses the center spine, anti-roll bar adjusters, the refueling adaptor, headrest structure, fuel vent, roll hoop, air jack fitting, air inlet, brake master cylinder, front spring/damper unit, front air jack, molded seat and impact lights.
Side Pod:
Also included in the chassis is the side pod, the bodywork on the side of the car covering the oil cooler, engine control unit and water radiator. The side pod and its components aid in engine cooling, car aerodynamics and driver protection in case of a side impact.
Fuel Cell:
The fuel cell is made of rubber and is covered with a Kevlar-fitted blanket for extra protection in side impacts. It holds 22 gallons of 100% fuel grade ethanol.
Gearbox/Bellhousing:
An IndyCar Series car features a manual six speed (no reverse) sequential shift gearbox. The gearshift is located on the right side of the cockpit and the driver pushes forward to downshift and pulls back to upshift. The bellhousing connects the gearbox to the engine. Key components of the gear box/bellhousing include the oil scavenger tower, rear anti-roll bar assembly, rear damper/spring assembly, transmission and rear attenuator.
Engine:
The IndyCar Series utilizes the normally-aspirated, 3.5-liter Honda Indy V-8 engine has 670 horsepower. It has four valves per cylinder. The 3.5 liter provides longer engine life between rebuilds and additional mid-range torque for the varied IndyCar Series schedule – from street/road courses to short ovals to superspeedways. The engine houses the exhaust system and the air box.
Tires:
Firestone Firehawk racing radials are mounted on 15-inch rims with front tires approximately 11 inches wide and rear tires approximately15 inches wide. The weight of an IndyCar Series car at is speed is approximately four times the static weight, so the tire sidewalls have to strong enough to handle the stress, yet thin enough to dissipate heat.
Front/Rear Suspension:
The front and rear suspension attach the wheels to the chassis. It is designed to withstand all the braking and acceleration loads in addition to vertical loads. The suspension includes the front brake disc and rear brake disc.
ANATOMY OF AN INDYCAR SERIES DALLARA CHASISS
Type:
Open-wheel, single-seat, open-cockpit and ground-effect underbody; outboard wings front and rear
Construction:
Monocoque contains cockpit, fuel cell and front suspension; engine is stressed (integral) member of chassis; rear assembly contains bellhousing, gearbox and rear suspension members
Materials:
Carbon fiber, kevlar and other composites
Weight:
1,530 pounds minimum for ovals and 1,600 pounds minimum for road courses, including all lubricants and coolants used during the event, but not including fuel or driver
Length:
192 inches minimum
Width:
78.5 inches maximum, 77.5 inches minimum (measured outside rim to rim)
Height:
Approximately 38 inches
Wheelbase:
120 inches, plus or minus 2 inches (118 inches to 122 inches)
Wheel Size:
Front: 15 inches diameter, 10 inches wide
Minimum weight: 13.48 pounds
Rear: 15 inches diameter, 14 inches wide
Minimum weight: 14.7 pounds
Tires:
Firestone Firehawk
Front diameter: 26 inches maximum, 25 inches minimum @ 35 psi
Rear diameter: 27.5 inches maximum, 26.5 inches minimum @ 35 psi
Gearbox:
XTRAC #295 gearbox (gears forward of rear axle)
Six forward gears, sequential shifter
Fuel Cell:
Single, rupture-proof cell, 22 U.S. gallons (standard)
Manufacturer:
Dallara Automobili, Italy
HONDA ENGINE
Type:
3.5-liter (183.07 cubic inches) V-8, 32-valve dual-overhead cam (DOHC), Normally aspirated (no turbocharger)
Max. bore diameter 93 millimeters
Four camshafts, four valves per cylinder
Weight:
Minimum weight is 280 pounds. Dry weight - no headers, clutch, ECU, spark box or filters
RPM:
10,300 maximum (IRL-supplied rev limiter)
Power:
Estimated 670 horsepower
Fuel:
100 percent fuel-grade ethanol
Injector:
Electronic
Models:
Honda Racing HI7R Indy V-8
Manufacturers:
American Honda Motor Co., Inc.
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