From src/game/sim/upgrades.ts. Percentages are normalised so all upHP add up to 150%.
R- and H-class cars get 80% of every upgrade (sim/specs.ts). Drag tires, suspension, drivetrain and the
turbo parts do not use their HP, torque and weight columns: they change grip, weight transfer,
gearbox and boost instead (tuning).
Stages
Every non-single part is bought in stages. Its effect is stage factor × part percentage, its price cost × stage price.
| # | Stage | HP | TQ | Weight | Price × |
|---|
| 0 | Stock | 0 | 0 | 0 | 0 |
| 1 | Stage 1 | 0.4 | 0.4 | 0.2 | 0.5 |
| 2 | Stage 2 | 0.5 | 0.5 | 0.3 | 1 |
| 3 | Stage 3 | 0.65 | 0.65 | 0.4 | 2 |
| 4 | Stage 4 | 0.8 | 0.8 | 0.5 | 4 |
| 5 | Stage 5 | 1 | 1 | 0.6 | 8 |
Drivetrain
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Drivetrain
drivetrain | 2,000 | 6.3 | 6.3 | 6.3 | |
Computer
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
ECU Chip Upgrade
ecu | 500 | 6.3 | 6.3 | 3.2 | |
Ignition
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Ignition Upgrade
ignition | 320 | 6.3 | 6.3 | 0.0 | |
Hot Wires
hotwires | 120 | 3.2 | 3.2 | 0.0 | |
Racing Spark Plugs
plugs | 50 | 1.3 | 1.3 | 0.0 | |
Engine
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Cam Gears
camgears | 120 | 3.2 | 3.2 | 0.0 | |
Head Work
headwork | 220 | 4.4 | 4.4 | 0.0 | |
High-Comp Pistons
pistons | 1,500 | 9.5 | 9.5 | 6.3 | |
Fuel
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
High-Flow Fuel Injectors
injectors | 240 | 6.3 | 6.3 | 6.3 | |
Oil Cooler
oilcooler | 750 | 9.5 | 9.5 | 9.5 | |
Fuel Pump
fuelpump | 500 | 9.5 | 9.5 | 9.5 | |
Exhaust
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Exhaust Kit
exhaustkit | 50 | 0.0 | 3.2 | 1.3 | |
Catalytic Convertor
catalytic | 300 | 6.3 | 0.0 | 1.3 | |
Exhaust Header Upgrade
header | 100 | 3.2 | 0.0 | 1.3 | |
Racing Exhaust Tip
exhausttip | 50 | 0.0 | 6.3 | 1.3 | |
Induction
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
High-Boost Pulley
pulley | 305 | 9.5 | 9.5 | 3.2 | |
Sequential Blow-Off Valves
blowoff | 600 | 9.5 | 9.5 | 6.3 | requires turbo |
Intercooler
intercooler | 1,000 | 7.6 | 7.6 | 7.6 | |
Supercharger
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Turbo/Supercharger
turbo | 4,000 | 25.2 | 31.5 | 25.2 | |
Turbo Upgrade
turboup | 1,000 | 6.3 | 6.3 | 6.3 | requires turbo |
Intake
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Air Filter
airfilter | 35 | 4.4 | 4.4 | 6.3 | |
Cold-Air Intake
coldair | 180 | 3.2 | 3.2 | 3.2 | |
Suspension
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Coilovers Upgrade
coilovers | 350 | 6.3 | 6.3 | 6.3 | |
Performance Springs
springs | 180 | 3.2 | 3.2 | 3.2 | |
Tires
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Optimized Drag Tires
dragtires | 100 | 0.0 | 0.0 | -3.2 | |
Nitrous
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Nitrous Kit
nitrouskit | 1,000 | 0.0 | 0.0 | 0.0 | single |
Dual-Port Nitrous Kit
dualport | 2,000 | 0.0 | 0.0 | 0.0 | single, requires nitrouskit |
Nitrous Reserve (1 bottle)
reserve1 | 2,000 | 0.0 | 0.0 | 3.2 | single, requires nitrouskit |
Nitrous Reserve (2 bottles)
reserve5 | 4,000 | 0.0 | 0.0 | 3.2 | single, requires reserve1 |
Nitrous Reserve (3 bottles)
reserve7 | 6,000 | 0.0 | 0.0 | 4.4 | single, requires reserve5 |
Weight
| Part | Cost | HP % | TQ % | Weight % | Notes |
|---|
Weight Stage 1
weight1 | 1,000 | 0.0 | 0.0 | -3.2 | single |
Weight Stage 2
weight2 | 2,000 | 0.0 | 0.0 | -6.3 | single, requires weight1 |
Weight Stage 3
weight3 | 4,000 | 0.0 | 0.0 | -12.6 | single, requires weight2 |
Weight Stage 4
weight4 | 8,000 | 0.0 | 0.0 | -18.9 | single, requires weight3 |
Weight Stage 5
weight5 | 16,000 | 0.0 | 0.0 | -25.2 | single, requires weight4 |