Fixed Setup Challenge · Night One

Stagger

How much bigger the right rear tire rolls out than the left rear.

LR Wheel Spacing

Measured left rear spacing. Bigger numbers move the left rear out; 14.0 in is the standard position.

RR Wheel Spacing

Measured right rear spacing. Sets leverage on the loaded corner; 18.5 in is the standard position.

RR Tire

Which of tonight's three game compounds goes on the right rear.

Front Block

Front ride-height block. Smaller block = higher chassis. Bigger block drops the nose and plants it.

Rear Block

Rear ride-height block. Smaller block = higher chassis. 5.50 is a slammed, low-CG rear end.

LF Torsion Bar

Left front torsion bar diameter. Bigger bar holds the left front up under load.

RF Torsion Bar

Right front torsion bar diameter. Controls how hard the car leans on the right front.

LR Torsion Bar

Left rear torsion bar diameter. Sets how much the left rear picks up on exit.

RR Torsion Bar

Right rear torsion bar diameter. Sets how hard the right rear plants on exit.

LF Compression

Left front damping. Compression resists the corner loading, rebound holds it down. Higher number = more compression damping.

LF Rebound

Left front damping. Compression resists the corner loading, rebound holds it down. Higher number = more rebound damping.

RF Compression

Right front damping. Governs how quickly the car rolls over on the right front. Higher number = more compression damping.

RF Rebound

Right front damping. Governs how quickly the car rolls over on the right front. Higher number = more rebound damping.

LR Compression

Left rear damping. Controls how the left rear lifts and returns on throttle. Higher number = more compression damping.

LR Rebound

Left rear damping. Controls how the left rear lifts and returns on throttle. Higher number = more rebound damping.

RR Compression

Right rear damping. Controls how the loaded corner takes the hit and drives off. Higher number = more compression damping.

RR Rebound

Right rear damping. Controls how the loaded corner takes the hit and drives off. Higher number = more rebound damping.

Wing Angle

How steep the top wing is set on the deck.

Injector Stacks

Stack height shapes where in the rev range the motor makes its power.

Nozzle Config

Which nozzles are feeding the motor. Lower only is the standard package; all 16 feeds the lowers and the upper/longs together and wants materially more fuel.

Lower Nozzles

Lower nozzle size. Smaller is leaner and hotter; bigger is richer and safer.

Upper / Long Nozzles

Upper/long nozzle size. A separate family from the lowers — only in play with upper-only or all 16.

Ignition Timing

Ignition advance for the feature. More timing is a harder hit and more heat; pulling timing is safer and can drive better on a slick racetrack.

Rear Gear

Final-drive ratio. Numerically lower is taller — lower RPM at a given wheel speed. Numerically higher is deeper — higher RPM and more pickup.

Fuel Load

Methanol in the tank at the green. Fuel is weight — and running out is a crew-chief failure, not bad luck.