2020 Chevrolet Corvette Track Preparation Form

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akesystem (ABS). Drive for at least0.6 mi (1 km) betweenapplications. Depending onconditions, some increase inbrake pedal travel and brakepedal force may beexperienced.STEP 3STEP 4Cooldown: Drive at 60 mph(100 km/h) for approximately10 mi (15 km) without usingthe brakes.Apply the brakes 25 times,starting at 60 mph (100 km/h)to 30 mph (50 km/h), whiledecelerating at 0.4 g. This isa medium brake application.Drive for at least 0.6 mi (1 km)between applications.Note: As with all high-performance brake systems, some amount of brake squeal is normal.ALTERNATIVE CLOSED COURSE BRAKE BURNISHING PROCEDUREThis brake burnishing procedure should only be run on vehicles with the J55 Z51 factory- equippedbrake system. This procedure should only be run on a track and only on dry pavement. Brake pedalfade will occur during this track burnishing procedure, and can cause brake pedal travel and force toincrease. This could extend stopping distance until the brakes are fully burnished.STEP 1STEP 2STEP 3Start track lapping at lower speeds andlower braking efforts for 3 minutes ofdriving. Allow for increased brakingdistances due to reduced brake output.After Step 1, increase speed and brakingeffort for the next 6 minutes of lapping,gradually ending up at 90% effort.Continue to allow for increased brakingdistance due to reduced brake output.Cool the brakes by lapping with minimallight braking for 6 minutes.

2020 CORVETTETRACK PREPARATIONBRAKE COOLING KITThe dealer-installed brake cooling parts should be visually inspected prior to any track event, highspeed braking or competitive driving. Step 4 below (Rear Lower Control Arm Cooling Duct) is notdealer-installed for highway use but should be installed prior to track use. It should be removed aftertrack use. Ensure all brake cooling parts are correctly and securely installed. Inspect for blockage inthe front and rear brake cooling ducts prior to every event.STEP 1STEP 2STEP 3STEP 4Front Brake Cooling DuctFront Lower Control ArmDeflectorRear Knuckle MountedCooling DuctRear Lower Control ArmCooling Duct3. ADJUST FOUR CORNERS AND ALIGNMENTSHOCK SPRING SEAT ADJUSTMENT, TIRE PRESSURES AND ALIGNMENTThe front shocks, on vehicles without hydraulic front lift and rear shocks, have threaded spring seatsthat allow adjustment of the preload on the coil springs. The vehicle corner weights can be adjustedfor track use. If the vehicle trim height is modified, it should be returned to normal trim height beforestreet use.The spring seat can be adjusted approximately 0.8 in (20 mm) up or down from the nominal position.Each complete turn of the spring seat will change the vehicle height approximately 0.06 in (1.5 mm).When adjusting the seat to the upper limit, lift the dust boot and ensure the seat does not thread offthe center support tube. Stop adjustment when threads are no longer visible. When adjusting theseat to the lower limit, leave approximately 0.4 in (10 mm) of thread visible for the lower lock nut tohave full thread engagement.To adjust the lower spring seat:STEP 1Raise the vehicleso the tires arecompletely offthe ground.STEP 2STEP 3STEP 4STEP 5Loosen the lower springseat lock nut.Thread the lower springseat lock nut downwardoff of the threads to itsresting location on theshoulder of the centersupport tube.While holding the centersupport tube holes, turnthe spring seat upwardto increase springpreload, or downward todecrease spring preload.Thread the lower locknut back on to thecenter support tube andtorque it against thespring seat to 18.4 lb.-ft.(25 nm).LOAD LIMITLimit vehicle load to the driver only, with no other cargo. Inflate the front tires to 23 psi (159 kPa) andthe rear tires to 24 psi (165 kPa).Road Course target hot pressures of 32–35 psi (220–240 kPa). Value will vary based on driving style,track, temperature and weather.

2020 CORVETTETRACK PREPARATIONWHEEL ALIGNMENTThe racing and competitive driving wheel alignment settings should be set as described here.To achieve the track alignment specified settings:1. The upper control arm to body washers on all four corners will need to be moved from between thebody and the control arm and relocated between the head of the bolt and the control arm.2. Adjust the lower control arm cam bolt position to achieve the following specifications.FRONT (PER CORNER)/ Caster: 8.0 degrees/ Camber: -3.0 degrees/ Toe (total): 0.1 degrees toe inREAR (PER CORNER)/ Caster: 0 degrees/ Camber: -2.5 degrees/ Toe (total): 0.1 degrees toe in/ Thrust Angle: 0 degreesNote: After track use, reinstall washers between the body and the control arms. Reset to factory alignment.4. FLUID LEVELSCHECK ENGINE OIL LEVELIf the vehicle is used for track events and competitive driving, the engine may use more oil than itwould with normal use. Low oil levels can damage the engine. Check the oil level often and maintainthe proper level.0W-40 dexos2 engine oil is approved for both track and street use. 15W-50 full synthetic engineoil may also be used for track use, but after track use must be changed back to 0W-40 dexos2 forstreet use. If 0W-40 dexos2 oil is not available, 5W-30 dexos1 full synthetic engine oil may be usedfor street use. If 5W-30 dexos1 is used, it must be changed to 0W-40 dexos2 or 15W-50 full syntheticengine oil for track use.DUAL CLUTCH TRANSMISSION FLUIDTransmission fluid and external filter should be changed after every 24 hours of track usage. Ifprompted by the transmission fluid life monitor that remaining fluid life is low, the fluid and filtershould be changed as soon as possible.Add an additional 2 qt (2 L) of DCT transmission fluid prior to track usage. It is not required to removethe additional 2 qt (2 L) of DCT fluid.Any transmission level set or change should be performed at your dealer. The transmission fluid usedin the dual clutch transmission is a specific transmission fluid. Use of unapproved fluid may causedamage to the transmission. See your dealer for the proper transmission fluid.

2020 CORVETTETRACK PREPARATION5. DRIVER MODE AND PTM SETTINGS (if equipped)DRIVER MODE SELECTORTrack mode should be selected for track use or competitive driving. The outer ring of the Driver ModeSelector is located on the console under the wrist pad. It rotates to change the modes, which displayin the instrument cluster. You can also set desired track settings for the steering wheel-mountedZ-mode button.COMPETITIVE DRIVING MODECompetitive Driving mode allows full engine power, while StabiliTrak/ESC helps maintain directionalcontrol of the vehicle by selective brake application. In this mode, the TCS is off and Launch Control isavailable.Adjust your driving style to account for the available engine power. In order to select this optionalhandling mode, the vehicle mode must be set to Sport or Track. If equipped with PerformanceTraction Management (PTM), then Competitive Driving mode is only available in Sport. Then, quicklypress the traction control button on the center console two times. ESC COMPETITIVE MODE displaysin the Driver Information Center (DIC).PERFORMANCE TRACTION MANAGEMENTCorvette models that are equipped with Z51 Performance Package and Magnetic Selective RideControl incorporate Performance Traction Management (PTM), which integrates the TractionControl, StabiliTrak and Selective Ride Control systems to provide consistent performance whencornering in track situations.TO UTILIZE PTM/ The vehicle must be in Track mode./ Quickly press the TCS/StabiliTrak button on the center console two times./ To select a mode, turn the Selective Ride Control/Performance Traction Management MODE SELECT knob./ PTM contains five modes. Mode 5 is Race with Active Handling off. It is for use by experienced drivers who are familiarwith the track, requires the most driving skill and should be used in dry conditions only. StabiliTrak is off and enginepower is available for maximum cornering speed.Note: For full details and information, see the vehicle Owner’s Manual.

2020 CORVETTETRACK PREPARATIONAFTER THE TRACKAfter driving your Stingray with Z51 Performance Package on the track, it is important to return thevehicle back to the original factory settings with the proper fluids before normal street driving.STEP 1Return the tirepressuresettings to factory(see the Tire andLoading Informationlabel located belowthe door latch withthe door open).STEP 2STEP 3STEP 4STEP 5STEP 6Return the wheelalignmentsettings to factory.Replace oil (use onlyengine oil licensedto the dexos1 specification of theproper SAEviscosity grade).Replace brakefluid (DOT-4HydraulicBrake Fluid).Rotate the DriverMode Selector outof Track mode.Return toproductiontrim height.Note: For full details and information, see the vehicle Owner’s Manual.

2020 CORVETTE TRACK PREPARATION Corvette Stingray with the Z51 Performance Package has been designed and engineered to be a world-class sports car for the track. But before unleashing its acceleration, cornering and braking . 2020 Chevrolet Corvette Track Prepara

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