Preparing your Infiniti performance car for a track day in Nashville is more than a quick once‑over. The combination of high‑speed corners, heavy braking zones, and sustained engine loads demands that every system be in peak condition. Nashville offers several venues, including Music City Raceway and the road‑course‑style events at the Nashville Superspeedway, where your Infiniti’s Q50 Red Sport, Q60, or even a G37 can stretch its legs. Without meticulous preparation, you risk mechanical failure, costly repairs, and a shortened driving day. This guide walks you through every critical check, from fluids to suspension, so you can arrive confident and drive hard.

Pre‑Track Day Inspection Checklist

The following sections detail each area you must inspect before your Infiniti sees a single lap. Work through them in order, and don’t skip the small items – track conditions punish neglect.

Fluid Levels and Condition

Performance driving stresses fluids like nothing else. High engine RPMs elevate oil temperature, brake heat soars with repeated stops, and transmission fluid experiences shearing forces in aggressive shifts. Check every reservoir while the engine is cold.

  • Engine oil. Verify level on the dipstick and note color and consistency. If it smells burnt or looks gritty, change it. For track use, consider moving to a high‑viscosity synthetic, such as 5W‑50 for turbocharged Infiniti engines, and fill to the full mark but never overfill. Many enthusiasts prefer Mobil 1™ for its thermal stability.
  • Brake fluid. This is one of the most critical fluids. Standard DOT 3 fluid absorbs moisture over time, lowering its boiling point. If the fluid appears dark or has been in service more than six months, flush it with DOT 4 or DOT 5.1 fluid (check your owner’s manual). A fluid test strip can confirm moisture content.
  • Coolant. Ensure the expansion tank is full with a 50/50 mix of antifreeze and distilled water. On track, coolant temperature can spike; a properly filled system with fresh fluid prevents local boiling (cavitation) in the water pump.
  • Transmission fluid. Automatic transmissions (including the seven‑speed in many Infinitis) require clean fluid for crisp shifts. Check level per the manufacturer’s procedure – often warm, engine running, on level ground. If the fluid is dark or smells burned, consider a service before the event.
  • Power steering fluid. Maneuvering in tight paddock areas and at low speeds in the pits can stress the pump. Top off if needed, and look for leaks around the rack and hoses.
  • Differential fluid. On rear‑wheel‑drive Infinitis (like the Q60), the rear differential gets hot during track work. Check for leaks and ensure the fluid is clear. Many track‑oriented owners upgrade to a synthetic 75W‑140.

Tires and Wheels

Your tires are the only contact patch with the asphalt. Street tires and performance summer tires behave very differently on a track. Even a brand‑new all‑season tire can overheat and delaminate under sustained cornering loads.

  • Tread depth. Minimum 4/32 inch for track use. Less than that and the tire cannot evacuate heat effectively. Use a tread‑depth gauge to check the inner, center, and outer grooves.
  • Tire pressure. Factory recommended pressures are for street comfort, not track grip. Start with a baseline 35–38 psi cold, then adjust after the first session once you see hot pressures. A good tire pressure gauge with a bleeder valve is essential. Do not exceed the tire’s maximum sidewall pressure.
  • Condition and age. Inspect for cuts, bulges, or cracks. Tires older than six years, even with tread remaining, become hard and lose grip. Check the DOT date code.
  • Wheel torque. After mounting or swapping wheels, tighten lug nuts to the Infiniti specification (typically 80–90 ft‑lb). Recheck after the first lap or two.
  • Alignments. Factory alignment settings are biased toward tire longevity and straight‑line stability. For track driving, consider a more aggressive alignment: slight negative camber front and rear, zero toe. This improves cornering grip and reduces outer‑edge wear. Have a reputable shop set it before the event.

Brake System

Brakes are arguably the most important system on a track car. Overheating leads to pedal fade, longer stopping distances, and damaged components.

  • Pads and rotors. Measure pad thickness. Anything less than 3mm is too thin and will likely cause metal‑on‑metal contact mid‑session. Rotors must be free of cracks, deep scoring, or a ridge at the edge. If the rotors are warped (pedal pulsation), replace them. For serious track use, many Infiniti owners upgrade to Hawk Performance pads or similar high‑temp compounds.
  • Brake fluid. As noted, flush with fresh DOT 4 or 5.1. Air in the lines compresses under heat, causing a soft pedal. Bleed the system until you get a firm, consistent pedal feel.
  • Brake lines. Rubber lines can swell under pressure. Consider stainless steel braided lines for consistency and safety. Visually check for cracks or leaks at each fitting.
  • Calipers. Ensure caliper pistons move freely and dust boots are intact. Sticking pistons cause uneven pad wear and pull.

Suspension and Steering

A tired suspension makes a car unpredictable at speed. Loose bushings, worn ball joints, or bad shocks can turn a fast lap into a crash.

  • Shocks and struts. Look for oil weeping on the shock body. Bounce the car at each corner – if it oscillates more than once after releasing pressure, the damper is worn. Track days accelerate damper wear, so fresh shocks (or coilovers) are a worthwhile investment.
  • Bushings. Control arm bushings, sway bar end links, and subframe bushings degrade with age and heat. Cracking or torn rubber lets the suspension move in unwanted ways. Polyurethane or solid bushings are popular upgrades for track‑focused cars.
  • Ball joints and tie rods. Jack up each corner and rock the wheel top‑to‑bottom and side‑to‑side. Any play indicates a worn joint. Replace immediately – a tie‑rod failure on track is catastrophic.
  • Alignment. As mentioned, a track alignment is not the same as a street alignment. If you haven’t had one done, at least verify that no suspension components are bent or out of spec.

Engine and Drivetrain

Your Infiniti’s V6 or turbocharged engine needs clean air, proper fuel delivery, and robust belts to survive a day of thrashing.

  • Air filters. A dirty filter restricts airflow, reducing power and increasing fuel trims. Replace the engine air filter and cabin filter if due. For track events, a high‑flow panel filter (like K&N) can help slightly.
  • Belts and hoses. Inspect serpentine belts for cracks, fraying, or glazing. Squeeze radiator hoses – they should feel firm, not mushy or rock‑hard. A burst hose on track dumps coolant in seconds.
  • Spark plugs. For high‑mileage cars, fresh spark plugs ensure complete combustion and prevent misfires under load. Check the gap and condition of each plug.
  • Fuel system. Use premium fuel (91 octane or higher). If your Infiniti is tuned, consider adding octane booster to prevent knock. A clean fuel filter is important – replace it if you’ve never done so.

Cooling System

Overheating is the single most common cause of track day mechanical failures. Nashville’s summer heat amplifies the risk.

  • Radiator and fans. Ensure the radiator fins are free of debris (bugs, leaves) and not bent. The electric cooling fan must come on at the correct temperature. If your car tends to run hot on the street, install a higher‑capacity radiator or add an auxiliary oil cooler.
  • Thermostat. A sticking thermostat can cause slow warm‑up or overheating. Replace it if there’s any doubt.
  • Coolant composition. Use the proper Nissan/Infiniti blue or green coolant. Tap water causes corrosion. A pressure test of the cooling system can reveal small leaks.

Electrical System

Electronic nannies, data logging, and even your helmet‑mounted camera rely on a stable voltage.

  • Battery. Check the terminal connections for corrosion and tightness. If the battery is more than four years old or shows low voltage (under 12.4V at rest), consider a replacement. A lightweight lithium battery saves weight but requires a specific charger.
  • Alternator. A failing alternator can cause intermittent electrical faults. Have the charging system tested if you notice dimmed lights or slow cranking.
  • Wiring and connectors. Look for chafed wires near the intake or exhaust. Secure any loose harnesses.

Performance Upgrades Worth Considering

While not mandatory for a first track day, several upgrades dramatically improve reliability and lap times.

  • High‑temperature brake pads and rotors. Street pads fade within three hard stops. Swap to dedicated track pads (e.g., Hawk DTC‑60 or Ferodo DS2500) and drilled or slotted rotors for better heat dissipation.
  • Differential cooler. On high‑power Infinitis, the rear differential can overheat. A simple finned cover or pump‑based cooler helps extend gear life.
  • Transmission cooler. For automatic cars, an auxiliary transmission cooler prevents thermal shutdown and sluggish shifts.
  • Engine oil cooler. A thermostatically controlled oil cooler keeps oil temps below 250°F, preserving viscosity and bearing life.
  • Performance alignment kits. Adjustable camber arms and toe links let you dial in aggressive geometry without compromising tire wear on the street.

For more detailed upgrade paths, the Infiniti official maintenance portal provides model‑specific recommendations and service intervals that complement track preparation.

Track Day Preparation Tips

Beyond mechanical checks, your overall readiness affects safety and enjoyment.

  • Safety equipment. Wear a Snell‑rated helmet (SA2020 or newer) and long pants/shirt. Bring a fire extinguisher (rated for B/C) and a first‑aid kit.
  • Documentation. Print your insurance card, vehicle registration, and the track’s waiver (available on Music City Raceway’s site). Some tracks require a tech inspection form signed by you or a mechanic.
  • On‑track pressure strategy. Start with 35 psi cold in all four tires. After the first session, measure hot pressures – you want around 40–42 psi for street tires, slightly higher for track tires. Bleed down if needed. Never drive on hot tires without rechecking.
  • Fuel level. Fill the tank to three‑quarters full before the first session. Full tanks add weight; half tanks can cause fuel starvation on sweeping corners. Refuel between sessions to keep near half tank.
  • Coach or instructor. If it’s your first track day, request an in‑car instructor. They’ll help you focus on smooth inputs rather than heroics.

Post‑Track Day Maintenance

The work isn’t over when the checkered flag falls. Your Infiniti needs a cool‑down routine and inspection to catch issues before they become problems.

  • Cool‑down lap. At the end of your last session, drive a full lap at moderate speed (4/10ths) without heavy braking. Then idle in the paddock for 3–5 minutes before shutting off. This circulates coolant through the turbocharger bearings and prevents oil coking.
  • Fluid check. Once the car has cooled (30 minutes), check all fluid levels again. Top off as needed. If any fluid is low, investigate for leaks.
  • Brake inspection. Look for pad‑thickness changes, rotor cracks, and leaks at the calipers. Many track‑day veterans replace pads after every two or three events.
  • Tire inspection. Check for flat‑spotting (vibration on the drive home), cuts, and sidewall bulges. Rotate tires front to back if you notice uneven wear.
  • Wheel torque. Recheck lug nut torque after the car has cooled – heat cycles can loosen them.
  • Wash and wax. Brake dust is acidic and can etch paint. Wash thoroughly and apply wax to protect the clear coat.

Final Thoughts

Track days are the ultimate test of your Infiniti’s engineering and your preparation. By following this comprehensive maintenance checklist, you minimize surprises and maximize seat time. Nashville’s track community is welcoming, and with proper prep, your Infiniti will deliver thrilling, reliable performance lap after lap. Remember: preventive maintenance is cheaper than a tow truck and a repair bill. Get your car ready, show up early, and enjoy the driving experience that your Infiniti was built for.